Assessment of Cadmium and Lead in Dried Sewage Sludge from Lubigi Feacal Sludge and Wastewater Treatment Plant in Uganda

Abstract

Sludge contains organic and inorganic compounds including traces of heavy metals such as lead (Pb), cadmium (Cd), copper (Cu), nickel (Ni), chromium (Cr) and others. These metals restrict the use of sludge in agriculture because their accumulation is harmful to the environment and particularly the food chain. Cadmium and lead are among the most common heavy metals found in municipal wastewater treatment plant sludge. They are capable of bioaccumulation in plant tissues like roots and leaves and are non-

Physico-Chemical Characterization of Sludge from the Goudel Drinking Water Production Plant in Niamey (Niger)

“…[27] had obtained average concentrations lower than ours for Ni (44 ± 7 mg/kg), Cu (68 ± 18 mg/kg) and higher for Zn (199 ± 71 mg/kg) and Pb (85 ± 25 mg/kg). These metals restrict the use of sludge in agriculture because their accumulation is harmful to the environment and particularly the food chain [28]. As for [29], they obtained concentrations similar to ours for Cu (172.56 mg/kg) and Pb (76.88 mg/kg) but higher for Zn (218.73 mg/kg) and Mn (157.56 mg/kg).…”