Removal of Heavy Metals in Municipal Sludge by Using Acetic Acid-H2O2- Ferrite Way

Zuwei Wang,Shi-Meng Wang

doi:10.1109/icbbe.2009.5163307

Zuwei Wang, Shi-Meng Wang

https://doi.org/10.1109/icbbe.2009.5163307

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Publication Date: Jun 1, 2009

Citations: 1

Affiliation: Tianjin Medical University

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Removals of copper and zinc from municipal sludge from Tianjin Dongjiao Sewage Treatment Plant by using acetic acid - H 2 O 2 way and the removals of heavy metals from municipal sludge extract fluid by using improved acetic acid- ferrite way were studied in experiment. The better technique condition to remove copper and zinc was that the quality concentration of acetic acid was 2 mol/L, the ratio of sewage sludge, H 2 O 2 and acetic acid was 1:2:50, the reaction time 4 hours in room temperature, and the removal rates of copper and zinc were over 95%. Using improved ferrite way and lime milk as neutralization, Cu, Zn, Cr, Ni, Cd, Pb could be removed from municipal sludge filtrate caused by acetic acid- H 2 O 2 , the removal rates of Cu, Zn, Cr, Ni, Cd, Pb were 94%, 98 %, 86 %, 92 %, 89 %, 99 % and the filtrate could be dicharged legally. The best technique condition was that the initial concentration of FeCl 3 /FeSO 4 was 0.10/0.05 mol/L, the added Fe 2+ :Fe 3+ (mol value) = 1:2, Fe 3+ /M n+ (Cu 2+ ,Zn 2+ ) = 10, the pH value was 9, reaction temperature was room temperature.

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