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John Andrew Marco Mahugija

Associate Professor

College of Natural and Applied Sciences

Chemisty

Biography

Summary

Prof. Mahugija is an Associate Professor in Chemistry Department, University of Dar es Salaam. He holds a PhD and MSc in Analytical and Environmental Chemistry obtained from the University of Dar es Salaam & German Research Centre for Environmental Health, Munich-Germany in 2011 and 2004, respectively. He also holds a BSc (Ed) (First Class Honours) (Biology, Chemistry and Education) obtained from the University of Dar es Salaam in 2001. He has held many administrative and technical posts at the University of Dar es Salaam and other national and international institutions. He actively conducts, organizes and participates in teaching, research, consultancies, public services, leadership, conferences, workshops, courses, and special duties in national and international organizations, institutions and communities. He has visited many countries, including Austria, Bangladesh, Benin, Egypt, Ethiopia, Germany, Ghana, Kenya, Malawi, Netherlands, Nigeria, South Africa, Sudan, Sweden, Scotland-United Kingdom, Uganda, United Arab Emirates, and Zambia.

Work Experience

Prof. Mahugija has extensive work experience at the University of Dar es Salaam (since 2005) and other various national and international institutions/organizations. He has held various posts at the University of Dar es Salaam (UDSM) including the following: Assistant Lecturer 2005–2009, Lecturer 2009–2015, Senior Lecturer 2015–2019, Associate Professor 2019 to date; Member of UDSM Council 2023–2025, Chairperson of the University of Dar es Salaam Academic Staff Assembly (UDASA) 2023–2025; Member & Representative of theUDSM Council in the Appointments Committee (2024–2025); UDASA Representative in Appointments Committee 2023–2025; Member of UDSM Workers’ Council 2023–2025; UDASA Representative to the Senate  November 2024; Member of Awards Committee 2024/2025 to date; Chief Editor, Tanzania Journal of Science 2018 to 2023; Chairperson, College of Natural and Applied Sciences Publications Committee 2018–2023; Chairman, Delegated Tender Board of the University of Dar es Salaam Computing Centre (UCC) 2019–2022; Chairperson of many PhD and MSc viva voce examinations; Coordinator of PhD (Environmental Sciences) Programme & Coordinator and Member of the Steering Committee of the Master of Science in Integrated Environmental Management programme, 2015–2018; In-charge of Pesticides Analysis Laboratory 2005 to date; Member of several committees in Chemistry Department 2010 to date; Internal Examiner of MSc and PhD Theses and Dissertations 2013 to date;  Independent Internal Examiner of Chemistry Department 2018–2020; Independent Internal Examiner of Chemistry, Mkwawa University College of Education 2016–2018.

He has held other posts at various national and international institutions including the following: Commissioner/Board Member, Board of Directors (Commissioners) of the UNESCO National Commission 2021 to 2024; Board Member, Faculty of Science, Technology and Environmental Studies Board, Open University of Tanzania  2019 to 2025; Part-time Lecturer at five (5) universities/Colleges (Ardhi University, Dar es Salaam University College of Education, Mkwawa University College of Education, St. Joseph University in Tanzania, College of Engineering-Dar es Salaam, and University of Bagamoyo), and Teacher at various Secondary Schools 1994–2005; Treasurer and Coordinating Board Member of the African Network for the Chemical Analysis of Pesticides and Other Pollutants (ANCAP) 2012 to date; Assistant Executive Secretary of ANCAP (2012–2018); Chairperson of the Science and Technology Panel, Tanzania Institute of Education (TIE) 2019–2025; Chairperson of the Chemistry Panel, TIE 2018–2024; Editor and Evaluator of textbooks and other educational materials for the TIE 2016 to date; External Examiner/Reviewer and special duties of various institutions including the National Examinations Council of Tanzania (NECTA) 2015–2018, Technical University of Kenya 2022, Sokoine University of Agriculture 2018, Open University of Tanzania 2014, Nelson Mandela African Institution of Science and Technology 2024, and The State University of Zanzibar 2025; Chairperson of Interview Panels, Open University of Tanzania 2022–2025, Chairperson of Disciplinary Committees, Open University of Tanzania 2023–2024. Technical Committee Member at Tanzania Bureau of Standards (TBS) (Contaminants Technical Committee 2019 to date & Packaging Technical Committee 2020 to date); Member, Technical Expert Meetings for Approval and Registration of Pesticides, Tanzania Plant Health and Pesticides Authority (TPHPA) March 2023 to date; Chairperson, Shekilango Primary School, Dar es Salaam 2012–2016; Chairperson, St. Don Bosco School, Dar es Salaam 2016–2020; Education Officer, Ministry of Education and Culture HQ 2004–2005; Advisory Member, Editorial Board of the Journal of Maritime Science and Technology, Dar es Salaam Maritime Institute (DMI) 2023–2026; Chairperson, Parents-Teachers Association (PTA), Hermon Boys' Secondary School, Dar es Salaam 2026–2028;  President, Sengerema Secondary School Alumni Society 2016 to date.

He has supervised many MSc and PhD theses and dissertations and published many articles in reputable international journals as well as conference proceedings.  He actively organizes and participates in conferences, workshops, symposia and training courses. He is the editor of many primary and secondary schools’ textbooks. He undertakes many special duties, consultancy and public services in government and community institutions including being Guest of honour at various events.

Professional Affiliations/Membership

His membership include the following: Founder Member of African Network for the Chemical Analysis of Pesticides and Other Pollutants (ANCAP) 2002 to date; Member, Western Indian Ocean Marine Science Association (WIOMSA) 2005 to date; Member, Society of Environmental Toxicology and Chemistry (SETAC) 2006 to date; Member, World Academy of Young Scientists (WAYS) 2007 to 2017; Member, Tanzania Chemical Society (TCS) 2017 to date, and Reviewer of International Journals.

Academic Prizes/Awards and Distinctions

He is a winner of many prizes/awards including First Winner Award for the best outreach project of the year at University of Dar es Salaam 2021/2022; Best winner in publications in the College of Natural and Applied Sciences in 2018/2019; Winner in the best public service delivery/consultancy in the College of Natural and Applied Sciences in 2018/2019; University Prize-best final year student in the Faculty of Science, University of Dar es Salaam (UDSM) in 2000-2001; Thermodynamics Prize-best 2nd year student in Thermodynamics in 1998-1999; Chemistry Prize-best 2nd year student in Chemistry in 1998/1999; Tanzania Breweries Limited (TBL) Prize-best final year student in the Faculty of Science in 2000/2001; Double Cola Cash Prize-best final year student in the Faculty of Science in 2000–2001; Coca Cola Kwanza Prize-overall best final year student in B.Sc. (Ed) in 2001; Ministry of Science, Technology and Higher Education Prize-overall best student in the Faculty of Science, University of Dar es Salaam 1997–2001; and German Academic Exchange Service (DAAD) & University of Dar es Salaam Scholarships for conducting MSc & PhD studies at the University of Dar es Salaam and  Munich-Germany in 2001–2010.

Research Interest

Current Research/Consultancy Fields/Research Interests

  1. Analytical Chemistry and Environmental Chemistry: Analysis of organic and inorganic chemicals and contaminants such as pesticides, hydrocarbons, Polychlorinated Biphenyls (PCBs), aldehydes, drugs of abuse, proteins, pharmaceuticals and metals in environmental samples, foods, human samples, biological samples, industrial products and others.
  2. Instrumental analytical techniques such as Gas Chromatography (GC-MS, GC-ECD, GC-NPD), Liquid Chromatography (LC-MS, LC-MS/MS, HPLC), Atomic Absorption Spectrometry (AAS), and others.
  3. Pesticide Chemistry
  4. Chemical Waste Management
  5. Toxicology (Analytical/Chemical toxicology, Forensic toxicology, Environmental toxicology, Occupational toxicology)
  6. Development and applications of analytical methods for chemical substances and study the environmental chemodynamics, effects and remediation of xenobiotics.

Contacts

Email:

Projects

  1. Africa Stockpile Programme (ASP), Analysis of soil contamination by obsolete pesticides in Tanzania 2009. Co-Principal Investigator; Research and Consultancy for the National Environment Management Council (NEMC).
  2. The Food Security Programme 2009–2014: Principal investigator, Analysis of pesticides and persistent organic pollutants in the environment and edible biota in Tanzania, funded by SIDA.
  3. The African Network for the Chemical Analysis of Pesticides and Other Pollutants (ANCAP) programmes 2002 to date; Principal Investigator and Administrator of the project; with members in Ethiopia, Kenya, Nigeria, Rwanda, Sudan, Tanzania, Uganda and Zimbabwe; funded by the International Science Programme (ISP), Uppsala, Sweden.
  4. Evaluation of plastic bag industries and possibility of producing alternative bags in Tanzania–A consultancy for the NEMC, Vice President’s Office, 1st June to August 2018. The findings of this project were used for the ban of the production, importation and use of plastic bags in Tanzania through enactment of Environmental Management ACT (CAP 191, Government Notice No. 394), which came into force on 1st June, 2019.
  5. Study on non-woven carrier bags to determine the required physical and chemical characteristics to degrade–Phase 1: A consultancy for the NEMC, Lead Consultant/Chairperson of the project; March 2020.
  6. A study of non-woven carrier bags manufactured and/or marketed in Tanzania to determine the required physical and chemical characteristics to degrade–Phase 2: A research for the NEMC funded by the Tanzania Commission for Science and Technology (COSTECH) T; Co-PI/Lead Researcher.
  7. IPICS TAN:02 Analytical and Environmental Chemistry Research Project (Reg. No. CoNAS-CH21064), Project Leader/PI; supported by the International Science Programme (ISP), Uppsala University, Sweden from January 2021–December 2024.
  8. Combating Environmental Mercury Pollution: Environmental Impacts Assessments, Climate Change Interrelationships, and Remediation Studies in Tanzania–A research project funded by the Tanzania Commission for Science and Technology (COSTECH) for 2025/2026–2027/2028; Co-Principal Investigator (Co-PI).

Publications

Publications in Refereed Journals

  1. Mahugija-Marco, J.A. and Kishimba, M.A., 2005. Concentrations of pesticide residues in grasses and sedges due to point source contamination and the indications for public health risks, Vikuge, Tanzania. Chemosphere61, 1293–1298. https://doi.org/10.1016/j.chemosphere.2005.03.059
  2. Mahugija-Marco, J.A. and Kishimba, M.A., 2006. Pesticides and metabolites in cassava, eucalyptus, plum and cashew leaves and roots in relation to a point source in Kibaha, Tanzania. Chemosphere 64, 542–548. https://doi.org/10.1016/j.chemosphere.2005.11.016
  3. Mahugija-Marco, J.A. and Kishimba, M.A., 2007. Organochlorine pesticides and metabolites in young leaves of Mangifera indica from sites near a point source in Coast Region, Tanzania. Chemosphere 68, 832–837. https://doi.org/10.1016/j.chemosphere.2007.02.026
  4. Mahugija-Marco, J.A. and Kishimba, M.A., 2007. Distribution of pesticide residues in soil and sediments from areas of Coast Region near a heavily contaminated site in Tanzania. International Journal of BioChemiPhysics 16, 7–16.
  5. Mahugija-Marco, J.A. and Kishimba, M.A., 2007. Contamination of surface waters by obsolete pesticides emanating from a point source in Coast Region, Tanzania. International Journal of BioChemiPhysics16, 17–26.
  6. Ssebugere, P., Wasswa, J., Mbabazi, J., Nyanzi, S.A., Kiremire, B.T. and Mahugija- Marco, J.A., 2010. Organochlorine pesticides in soils from south-western Uganda. Chemosphere78(10), 1250–1255. https://doi.org/10.1016/j.chemosphere.2009.12.039
  7. Mahugija, J.A.M., 2012. Status of pesticides and degradation products in soil after clean-up of stockpiles and treatment with sodium hydroxide at a former storage site in Korogwe, Tanzania. Tanzania Journal of Science 38(3), 27–40.
  8. Mahugija, J.A.M., 2012. Organochlorine pesticides and degradation products in soil around a former formulation plant in Morogoro municipality, Tanzania. Tanzania Journal of Science 38(3), 41–53.
  9. Mahugija, J.A.M., 2013. Status and distributions of pesticides buried at five sites in Arusha and Mbeya regions, Tanzania. African Journal of Pure and Applied Chemistry 7(12), 382–393. https://doi.org/10.5897/AJPAC2013.0531
  10. Mahugija, J.A.M., Henkelmann, B. and Schramm, K.W., 2014.  Levels, compositions and distributions of organochlorine pesticide residues in soil 5–14 years after clean-up of former storage sites in Tanzania. Chemosphere117, 330–337. https://doi.org/10.1016/j.chemosphere.2014.07.052
  11. Mahugija, J.A.M., Henkelmann, B. and Schramm, K.W., 2015. Levels and patterns of organochlorine pesticides and their degradation products in rainwater in Kibaha Coast Region, Tanzania. Chemosphere 118, 12–19. https://doi.org/10.1016/j.chemosphere.2014.05.051
  12. Mahugija, J.A.M., 2015. Levels and profiles of polycyclic aromatic hydrocarbons and polychlorinated biphenyls in soil at an industrial area in Dar es Salaam, Tanzania. International Journal of Humanities, Arts, Medicine and Sciences 3(6), 1–7.
  13. Lugwisha, E.H.J., Mahugija, J.A.M. and Mwankuna, C., 2016. Levels of formaldehyde and acetaldehyde in selected bottled drinking water sold in urban areas in Tanzania. Tanzania Journal of Science 42, 1–14.
  14. Mahugija, J.A.M., Nambela, L. and Mmochi, A.J., 2017. Levels and distribution of pesticide residues in soil and sediments in Eastern Lake Tanganyika environs. International Journal of Biological and Chemical Sciences 11(5), 2537–2547. https://doi.org/10.4314/ijbcs.v11i5.46
  15. Mahugija, J.A., Khamis, F.A. and Lugwisha, E.H., 2017. Determination of levels of organochlorine, organophosphorus, and pyrethroid pesticide residues in vegetables from markets in Dar es Salaam by GC-MS. International Journal of Analytical Chemistry 2017, 9 pages. https://doi.org/10.1155/2017/4676724
  16. Mahugija, J.A.M., Kayombo, A. and Peter, R., 2017. Pesticide residues in raw and processed maize grains and flour from selected areas in Dar es Salaam and Ruvuma, Tanzania. Chemosphere 185, 137–144. https://doi.org/10.1016/j.chemosphere.2017.07.014
  17. Mahugija, J.A.M., Khamis, F.A. and Lugwisha, E.H.J., 2017. Assessment of pesticide residues in tomatoes and watermelons (fruits) from markets in Dar es Salaam, Tanzania. Journal of Applied Sciences and Environmental Management 21(3), 497–501. https://dx.doi.org/10.4314/jasem.v21i3.10
  18. Mahugija, J.A.M., Ahmed, K.N. and Makame, Y.M.M., 2017. Polycyclic aromatic hydrocarbons (PAHs) contamination in coastal mangrove ecosystems of the Zanzibar archipelago. Western Indian Ocean Journal of Marine Science 16(1), 25–34.
  19. Mahugija, J.A.M., Nambela, L. and Mmochi, A.J., 2018. Determination of dichlorodiphenyltrichloroethane (DDT) and metabolites residues in fish species from Eastern Lake Tanganyika. South African Journal of Chemistry 71, 86–93. https://doi.org/10.17159/0379-4350/2018/v71a11
  20. Mahugija, J.A.M. and Sheikh, H.M., 2018. Status of selected heavy metals dispersion from top soil in and around automobile workshop areas in Zanzibar Municipality, Tanzania. Tanzania Journal of Science 44 (1), 12–23.
  21. Mahugija, J.A.M., Chibura, P.E. and Lugwisha, E.H.J., 2018. Residues of pesticides and metabolites in chicken kidney, liver and muscle samples from poultry farms in Dar es Salaam and Pwani, Tanzania. Chemosphere 193, 869–874. https://doi.org/10.1016/j.chemosphere.2017.11.094
  22. Mahugija, J.A.M., 2018.  Levels of heavy metals in drinking water, cosmetics and fruit juices from selected areas in Dar es Salaam, Tanzania. Tanzania Journal of Science 44(1), 1–11.
  23. Mahugija, J.A.M., Chibura, P.E. and Lugwisha, E.H.J., 2018. Occurrence of organochlorine and organophosphorus pesticide residues in poultry feeds, raw and cooked eggs from selected farms in Ilala and Kibaha Districts, Tanzania. Journal of Applied Sciences and Environmental Management 22(2), 191–196. https://dx.doi.org/10.4314/jasem.v22i2.6
  24. Mahugija, J.A.M., Kasenya, Z.S. and Kilulya, K.F., 2018. Levels of heavy metals in urine samples of school children from selected industrial and non-industrial areas in Dar es Salaam, Tanzania. African Health Sciences 18(4), 1226–1235. https://dx.doi.org/10.4314/ahs.v18i4.44
  25. Mahugija, J.A.M. and Njale, E., 2018. Levels of polycyclic aromatic hydrocarbons (PAHs) in smoked and sun-dried fish samples from areas in Lake Victoria in Mwanza, Tanzania. Journal of Food Composition and Analysis 73, 39–46. https://doi.org/10.1016/j.jfca.2018.07.010
  26. Mahugija, J.A.M., 2018. Determination of toxic diethylene glycol in toothpastes in Dar es Salaam by high performance thin layer chromatography and colorimetric methods. Tanzania Journal of Science 44(2), 117–127.
  27. Mahugija, J.A.M. and Njale, E., 2018. Effects of washing on the polycyclic aromatic hydrocarbons (PAHs) contents in smoked fish. Food Control 93, 139-143. https://doi.org/10.1016/j.foodcont.2018.05.050
  28. Mahugija, J.A.M., Kasenya, Z.S. and Kilulya, K.F., 2020. Variations of concentrations of lead, zinc, iron, copper and cadmium in urine of primary school pupils in relation to age, sex and academic performance. Tanzania Journal of Science 46(2), 190–204. https://dx.doi.org/10.4314/tjs.v46i2.1
  29. Mahugija, J.A.M., Wandwi, A.N. and Kilulya, Kessy F., 2020. Comparison of centrifugation and solid phase extraction (SPE) methods of sample preparations in determination of residues of drugs of abuse in urine. Tanzania Journal of Science 46(3), 585–596. https://dx.doi.org/10.4314/tjs.v46i3.1
  30. Mahugija, J.A.M., Ngabala F. and Ngassapa, F.N., 2021. Effectiveness of common household washing of tomatoes on the removal of pesticide residues. Tanzania Journal of Science 47(1), 390–404.https://dx.doi.org/10.4314/tjs.v47i1.33
  31. Lyasenga, T.J., Mwijage, A., Shilla, D.J., Mahugija, J.A.M., Gaspare, L., Mfilinge, P.L. and Shilla, D.A., 2021. Diet and isotopic metrics of predatory and prey fish in two estuaries with different degrees of anthropogenic disturbances: the case study of Wami and Pangani rivers in Tanzania. Advances in Oceanography and Limnology 12(2). https://doi.org/10.4081/aiol.2021.9987
  32. Njale, E., Mahugija, J.A.M., Shilla, D.J., Dharsee, N. and Mbare, N.S., 2024. Association between exposure to heavy metals and the risk of breast cancer: A case-control study in Tanzania. Environmental Toxicology and Pharmacology 110, 104498.https://doi.org/10.1016/j.etap.2024.104498
  33. Njale, E., Shilla, D.J., Dharsee, N., Mahugija, J.A.M. and Mbare, N.S., 2025. Association between single and mixed exposure to potentially toxic trace metals and the risk of prostate cancer: a case–control study in Tanzania. Environmental Geochemistry and Health 47(6), 194. https://doi.org/10.1007/s10653-025-02497-7
  34. Njale, E., Mahugija, J.A., Shilla, D.J. and Mbare, N.S., 2026. Associations of individual and combined alterations in essential trace metal levels with breast cancer risk: A case-control study in Tanzania. Journal of Trace Elements in Medicine and Biology 94, 127823. https://doi.org/10.1016/j.jtemb.2026.127823

Publications in Conferences/Workshops Proceedings and Reports

  1. Mahugija Marco J.A. and Kishimba, M.A. Levels of pesticides and metabolites in water, flora, soil and sediments due to point source contamination and the indications for public health risks–Proceedings of the African Network for the Chemical Analysis of Pesticides (ANCAP) Inaugural Conference, Arusha 2004, pp 79–88.
  2. Mahugija Marco J.A. and Kishimba, M.A. Concentrations of polar pesticide residues in the surface waters of selected areas of Coast Region, Tanzania–A paper presented at the regional workshop on nitrogen, phosphorus and sulphur derivatives in the environment, Hotel Africana, Kampala–Uganda, 20th January 2005.
  3. Mahugija Marco J.A. and Kishimba, M.A. Mango (Mangifera indica) leaves as biondicators of the spatial distribution of organochlorine pesticides and metabolites from a point source–A paper presented at the ANCAP Symposium, Makerere University, Uganda 21–22 July 2005.
  4. Mahugija Marco, J.A., Kishimba M.A. and Joice, R. Organochlorine pesticides and metabolites in drinking water from sites near Vikuge storage site in Coast Region–Tanzania–A paper presented at the international conference on pesticide use in developing countries, Arusha International Conference Centre, 16th–20th October 2006.
  5. Mahugija Marco J.A. and Kishimba, M.A. Comparison of the types and concentrations of organochlorine compounds in environmental samples between gas chromatographic-electron capture and mass spectrometric detection–A paper presented at the First African Congress on Pesticides and Toxicology Sciences, held on 8th–11th November 2008 at the University of Gezira, Wad Medani, Gezira State-Sudan.
  6. Mahugija, J.A.M. Levels and toxicological implications of organochlorine pesticides and metabolites in soil at some hotspots in Tanzania–A paper presented at the 4th International Toxicology Symposium in Africa, held on 2nd–4th September 2012 at the University of Zambia, Lusaka.
  7. Nambela L. and Mahugija, J.A.M. Levels and chemodynamics of pesticide residues in Lake Tanganyika Basin, Tanzania. A paper presented at the Sida-SAREC Regional Collaboration Conference, 31 July-2 August 2013, Bagamoyo-Tanzania.
  8. Mahugija, J.A.M., Henkelmann B. and Schramm, K.W. Levels and patterns of organochlorine pesticides and their degradation products in rainwater in Coast region, Tanzania–A paper presented at the 6th SETAC Africa Conference held at Intercontinental Hotel in Lusaka, Zambia on 2nd–3rdSeptember 2013 and at the 5th International Toxicology Symposium in Africa held on 11th–14th September 2013 at the Kwame Nkrumah University of Science and Technology in Kumasi, Ghana.
  9. Mahugija, J.A.M., Nambela L. and Mmochi, A. Levels and distribution of DDT residues in fish species in eastern Lake Tanganyika in Tanzania–A paper presented at the 6th International Toxicology Symposium in Africa held on 28th–30th August 2014 at the Garden Court, Johannesburg, South Africa.
  10. Mahugija J.A.M. and Nambela, L. Pesticide residues in water from rivers and lakes in Lake Tanganyika basin, Tanzania–Peer Reviewed Proceedings of the 7th International Toxicology Symposium in Africa held at the Garden Court, Johannesburg, South Africa, 31st August 2015, pp 77–78.
  11. Mahugija, J.A.M.  Qualities of effective teaching and bad teaching in higher education-A Lecture presented at the Faculty Development Programme, St Joseph University in Tanzania, held at St. Joseph College of Engineering Dar es Salaam, 6th October 2015.
  12. Mahugija, J.A.M., Khamis F.A. and Lugwisha, E.H.J. Levels of pesticide residues in fruits and vegetables from markets in Dar es Salaam, Tanzania–Peer Reviewed Proceedings of the 8th International Toxicology Symposium in Africa held at Gawharet Al Ahram hotel in Giza-Cairo, Egypt, 29th–31st August 2016, pp 32–33.
  13. Lugwisha, E.H.J., Mahugija J.A.M. and Mwankuna, C. Levels of formaldehyde and acetaldehyde in selected bottled drinking water sold in urban areas in Tanzania–A paper presented in the 9th International Toxicology Symposium in Africa held at the Constantial Hotel & Suites in Benin City, Nigeria, 07th–08th September 2017.
  14. Ilomo O. and Mahugija, J.A.M.  Collection and analysis of water samples from Export Processing Zones Authority (EPZA) and Twiga Cement Industry (Wazo) in Dar es Salaam: A consultancy report submitted to the National Environment Management Council (NEMC), 27th April 2018.
  15. Kilulya, K.F.,  Mahugija, J.A.M.,  Ilomo, O.O.,  Nyandoro, S.S., Ndoile, M.M., Peter, R. Kinunda, G.A.,  Sung'hwa, F.T.,  Philip, J.Y.N. and  Lugwisha, E.H.J.  Evaluation of plastic bag industries and possibility of producing alternative bags in Tanzania–A consultancy report submitted to the National Environment Management Council (NEMC), Vice President’s Office, August 2018.
  16. Mahugija, J.A.M., Ngabala F. and Ngassapa, F. Effects of industrial processing on the levels and fate of pesticide residues in tomato products–A paper presented at the 12th symposium ofthe African Network for Chemical Analysis of Pesticides and other Pollutants (ANCAP) held at the University of Dar es Salaam, 2nd to 4th December 2019.
  17. Mahugija, J.A.M., Kilulya, K.F., Lugwisha, E.H.J.,  Minja R.J.A. and Mrema, G. A study on non-woven carrier bags to determine the required physical and chemical characteristics to totally degrade–phase 1: A consultancy report submitted to the National Environment Management Council (NEMC), March 2020.
  18. Lyasenga, T.J., Mwijage, A.P., Shilla, D.J., Mahugija, J.A.M., Gaspare, L,, Mfilinge, P.L., and Shilla, D.A., Diet and isotopic metrics of predator and prey fish in two estuaries with different degrees of anthropogenic disturbances: the case study of Wami and Pangani rivers in Tanzania, 4th Tanzania Chemical Society (TCS) International Conference and 14th  ANCAP Symposium, SUA, Morogoro-Tanzania, 16-17 December 2021,
  19. Mmochi, A.J., Haji, H.M. and Mahugija, J.A.M., Comparative adsorption performance of dichlorvos and zinc by coal and their effect on survival and growth rates of Zanzibar Tilapia (Oreochromis urolepis hornorum), 4th TCS Conference and 14th ANCAP Symposium, SUA, Morogoro-Tanzania, 16–17 December 2021.
  20. Njale, E. and Mahugija, J.A.M., Effects of washing on the polycyclic aromatic hydrocarbons (PAHs) contents in smoked fish, 4th TCS Conference and 14th ANCAP Symposium, Sokoine University, Morogoro-Tanzania, 16–17 December 2021.
  21. Wandwi, A.N., Kilulya, K.F. and Mahugija, J.A.M., Levels of selected drugs of abuse and metabolites in urine samples from street gangs in Dar es Salaam, 4th TCS Conference and 14th ANCAP Symposium, SUA, Morogoro-Tanzania, 16–17 December 2021.

Journals Edited and Published

As Chief Editor; Edited and published Tanzania Journal of Science Vol. 44 (No. 4) 2018; Vol. 45 (4 Issues) 2019; Vol. 46 (3 Issues) 2020; Vol. 47 (5 Issues) 2021; Vol. 48 (4 Issues) 2022, and Vol. 49 (4 Issues) 2023. A total of 464 high quality articles were published in 21 issues in 5 years. Increased the publication frequencies from 2 issues per year to 4 issues + special issues per year. Increased the number of articles from international contributors (mostly 33.3–58.3%). Obtained new indexing in reputable international databases, e.g. Centre for Agriculture and Bioscience International, UK (CAB International or CABI)–CAB Direct, CAB Abstracts, Global Health, EBSCO, Crossref, and continued indexing in African Journals Online (AJOL). Obtained and assigned Digital Object Identifiers (DOIs) to articles.

Books Edited (Textbooks)

  1. Editor, General and Inorganic Chemistry for Advanced Level Secondary Schools, Student’s Book Form Five and Six, Tanzania Institute of Education (TIE) 2024. ISBN 978-9912-753-10-5.
  2. Editor, Organic Chemistry for Advanced Level Secondary Schools, Student’s Book Form Five and Six, Tanzania Institute of Education (TIE) 2024.
  3. Editor, Inorganic Chemistry for Advanced Level Secondary Schools, Student’s Book Form Five and Six, Tanzania Institute of Education (TIE) 2019. ISBN 978-9987-09-029-7.
  4. Editor, Chemistry for Secondary Schools Student’s Book Form Four, TIE 2022.
  5. Editor, Chemistry for Secondary Schools Student’s Book Form Three, Tanzania Institute of Education (TIE) 2022.
  6. Editor, Chemistry for Secondary Schools Student’s Book Form Two, TIE 2021, 2024.
  7. Editor, Chemistry for Secondary Schools Student’s Book Form One, TIE 2021, 2024.
  8. Editor, Science and Technology Standard Seven Pupil’s Book, TIE 2020. ISBN 978-9987-09-197-3.
  9. Editor, Sayansi na Teknolojia Kitabu cha Mwanafunzi Darasa la Saba [Science and Technology Standard Seven-Pupil’s Book], Tanzania Institute of Education (TIE) 2020. ISBN 978-9987-09-146-1.
  10. Editor, Science and Technology Standard Seven Teacher’s Guide, TIE 2020. ISBN 978-9987-09-198-0.
  11. Editor, Sayansi na Teknolojia Kiongozi cha Mwalimu Darasa la Saba [Science and Technology Standard Seven Teacher’s Guide], TIE 2020. ISBN 978-9987-09-147-8.
  12. Editor, Science and Technology Standard Six Pupil’s Book, TIE 2020.
  13. Editor, Sayansi na Teknolojia Kitabu cha Mwanafunzi Darasa la Tano [Science and Technology Standard Five Pupil’s Book], TIE 2018. ISBN 978-9976-61-817-4.
  14. Editor, Sayansi na Teknolojia Kiongozi cha Mwalimu Darasa la Tano [Science and Technology Standard Five Teacher’s Guide], TIE 2018.
  15. Editor, Health and Environment Standard One Pupil’s Book, Tanzania Institute of Education (TIE) 2019. ISBN 978-9987-09-006-8.
  16. Editor, Health and Environment Standard Two Pupil’s Book, TIE 2019. ISBN 978-9987-09-007-5.
  17. Editor, Afya na Mazingira Kiongozi cha Mwalimu Darasa la Kwanza [Health and Environment Standard One Teacher’s Guide], TIE 2019.
  18. Editor, Afya na Mazingira Kiongozi cha Mwalimu Darasa la Pili [Health and Environment Standard Two Teacher’s Guide], TIE 2019.
  19. Editor, Sayansi na Teknolojia Kitabu cha Mwanafunzi Kundirika la Kwanza Mwaka wa 2 [Science and Technology Pupil’s Book, Non-formal Education 2nd Year], TIE 2021.
  20. Editor, Sayansi na Teknolojia Kiongozi cha Mwalimu Kundirika la Kwanza Mwaka wa 2 [Science and Technology Teacher’s Guide, Non-formal Education 2nd Year], TIE 2021.