Effects of sewage sludge biosolid amendments on the potential of maize (Zea mays L.) in phytoremediation of trace metals in chromated copper arsenate contaminated soils


  • Caroline Kiwanuka Nakiguli Mbarara University of Science and Technology
  • Timothy Omara Moi University
  • Emmanuel Ntambi Mbarara University of Science and Technology




Bioaccumulation factor, integrated pollution index, phytoextraction, translocation factor


The effect of sewage sludge amendment (5-25% w/w) on the potential of maize (MM3 variety) to phytoextract trace metals from chromated copper arsenate (CCA) contaminated soils was investigated. The metal content of fresh soils, and soils, maize roots and shoots after 80 days of planting were determined by atomic absorption spectroscopy. The concentrations of chromium, copper and arsenic in fresh CCA soils were 365.8 ± 6.18, 109.72 ± 14.04 and 28.22 ± 3.8 mg/kg respectively. The MM3 maize variety could be used to phytoextract or phytostabilize the trace metals in the CCA contaminated soils without or with 5-25% sewage sludge amendment.

Author Biographies

Caroline Kiwanuka Nakiguli, Mbarara University of Science and Technology

Chemistry Department, Faculty of Science, Mbarara University of Science and Technology, P.O. Box 1410, Mbarara, Uganda

Timothy Omara, Moi University

Department of Chemistry and Biochemistry, School of Sciences and Aerospace Studies, Moi University, P.O. Box 3900, Eldoret, Kenya

Emmanuel Ntambi, Mbarara University of Science and Technology

Senior Lecturer and Head of Chemistry Department, Faculty of Science, Mbarara University of Science and Technology, P.O. Box 1410, Mbarara, Uganda


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