Document Detail

Removal of heavy metals from sewage sludge by acid treatment.
MedLine Citation:
PMID:  11460338     Owner:  NLM     Status:  MEDLINE    
Sludge samples were found to contain significant amounts of heavy metals (Cr, Cu, Ni, Pb and Zn) and were subjected to acid treatment using either hydrochloric, sulfuric, nitric or phosphoric acid. The optimum combination, in terms of metal removal efficiency and environmental impacts was sought through a variety of tests by applying a ratio of 1:5 of sludge quantity (g) per volume of acid (ml). The concentrations of the different acids used, were in the range of 5%-20% and the contact times ranged between 15 and 60 minutes. The optimum combination was achieved when the sludge samples were in contact with H2SO4 20% v/v for 60 minutes. In order to estimate the metal leachability, the heavy metal content as well as the metal distribution in the residue were investigated and it was found that most of the heavy metal content was extracted while the remaining was removed from the initial mobile phases to the more stable ones.
C Naoum; D Fatta; K J Haralambous; M Loizidou
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering     Volume:  36     ISSN:  1093-4529     ISO Abbreviation:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Publication Date:  2001 May 
Date Detail:
Created Date:  2001-07-19     Completed Date:  2001-12-04     Revised Date:  2009-08-14    
Medline Journal Info:
Nlm Unique ID:  9812551     Medline TA:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  873-81     Citation Subset:  IM    
Department of Chemical Engineering, National Technical University of Athens, 9, Heroon Polytechniou Str., 157 73 Athens, Greece.
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MeSH Terms
Acids / chemistry
Environmental Pollution / prevention & control*
Metals, Heavy / chemistry*
Refuse Disposal / methods*
Sewage / chemistry*
Sulfuric Acids / chemistry*
Reg. No./Substance:
0/Acids; 0/Metals, Heavy; 0/Sewage; 0/Sulfuric Acids; 7664-93-9/sulfuric acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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