Bioleaching of six kinds of heavy metals (Zn, Cu, Pb, Cd, Cr and Ni) from sewage sludge with different substrates was studied, adopting S (concentrations of 5, 10 and 20 g/L), FeSO4·7H2O (concentrations of 10 and 20 g/L) and Na2S2O3 (concentrations of 10 and 20 g/L) as substrate. The results showed that acidification of S was best, because pH could reached about 2 at the forth day, and leaching of Zn、Cu、Pb、Cr and Ni achieved the maximum amount at concentrations of 10 and 20 g/L. Acidification and heavy metals leaching amount of FeSO4·7H2O were not as satisfied as that of S. Dealing with Na2S2O3 at the concentration of 10 g/L showed better results than with FeSO4·7H2O, while the concentration of Na2S2O3 was 20 g/L, filtrate was alkaline, heavy metals were difficult to filter out or even not to filter out.
CHEN Li-xuan
,
CHEN Fei
,
CAI Xiao-dong
,
CHEN Chun
. Effects of Substrates on Bioleaching of Heavy Metals from Sewage Sludge[J]. Subtropical Plant Science, 2013
, 42(04)
: 337
-341
.
DOI: 10.3969/j.issn.1009-7791.2013.04.013
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