Development of Streptococcus sanguis-driven FeⅢ-TAML/H2O2 Systems to Remove 4-chlorophenol in Water
FeⅢ-TAML has received growing attentions due to an efficient activator of H2O2 to oxidize varieties of organic pollutants.There are many concerns about excessive losses and potential hazard of H2O2 in the transportation,handling and storage.This study aims to construct microbial-driven FeⅢ-TAML/H2O2 systems by using Streptococcus sanguis with feature of generating H2O2 and investigate effects of related parameters on the removal of 4-chlorophenol.Results show that in the S.sanguis-driven FeⅢ-TAML/H2O2 systems,the degradation rate constants of 4-chlorophenol are positively correlated with temperature and cell density,whereas the removal of 4-chlorophenol is initially increased and subsequently decreased with increasing FeⅢ-TAML concentrations and pH.High removal of 96.9%is achieved for 4-chlorophenol in water within 3 h under the optimized conditions,including reaction temperature of 25℃,pH 8,FeⅢ-TAML of 2 μmol/L and OD600 of 0.4.
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