Microbial reduction of hexavalent chromium by landfill leachate |
| |
Authors: | Li Yarong Low Gary K-C Scott Jason A Amal Rose |
| |
Affiliation: | School of Chemical Engineering and Industrial Chemistry, The University of New South Wales, Sydney 2052, Australia. yarong.li@environment.nsw.gov.au |
| |
Abstract: | The reduction of hexavalent chromium (Cr(VI)) in municipal landfill leachates (MLL) and a non-putrescible landfill leachate (NPLL) was investigated. Complete Cr(VI) reduction was achieved within 17 days in a MLL when spiked with 100 mg l(-1) Cr(VI) or less. In the same period, negligible Cr(VI) reduction was observed in NPLL. In MLL, Cr(VI) reduction was demonstrated to be a function of initial Cr(VI) concentration and bacterial biomass and organic matter concentrations. The bacteria were observed to tolerate 250 mg l(-1) Cr(VI) in MLL and had an optimal growth activity at pH 7.4 in a growth medium. The MLL also possessed an ability to sequentially reduce Cr(VI) over three consecutive spiking cycles. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|