TY - JOUR
T1 - Kinetics of biological perchlorate reduction and pH effect
AU - Wang, Chao
AU - Lippincott, Lee
AU - Meng, Xiaoguang
PY - 2008/5/1
Y1 - 2008/5/1
N2 - Batch experiments were conducted to investigate the kinetics of perchlorate reduction by heterotrophic and mixed perchlorate-reducing bacteria. Substrate-utilizing and cellular maintenance models were employed to fit the experimental data for microbial perchlorate reduction. The half saturation constant, Ks, obtained in this study was below 0.1 mg/L, which indicated that perchlorate-reducing bacteria are effective at utilizing low concentrations of perchlorate. The effect of pH on the kinetics of microbial perchlorate reduction was also studied. Perchlorate reduction occurred throughout the pH range from 5.0 to 9.0. Nevertheless, the rates of perchlorate removal by a unit mass of bacteria were significantly different at various pHs with a maximum rate at pH 7.0. The variation of qmax with pH was described well with a Gaussian peak equation. This equation is expected to be applicable for practical purposes when pH effects need to be considered.
AB - Batch experiments were conducted to investigate the kinetics of perchlorate reduction by heterotrophic and mixed perchlorate-reducing bacteria. Substrate-utilizing and cellular maintenance models were employed to fit the experimental data for microbial perchlorate reduction. The half saturation constant, Ks, obtained in this study was below 0.1 mg/L, which indicated that perchlorate-reducing bacteria are effective at utilizing low concentrations of perchlorate. The effect of pH on the kinetics of microbial perchlorate reduction was also studied. Perchlorate reduction occurred throughout the pH range from 5.0 to 9.0. Nevertheless, the rates of perchlorate removal by a unit mass of bacteria were significantly different at various pHs with a maximum rate at pH 7.0. The variation of qmax with pH was described well with a Gaussian peak equation. This equation is expected to be applicable for practical purposes when pH effects need to be considered.
KW - Biological reduction
KW - Kinetics
KW - Perchlorate
KW - pH effect
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U2 - 10.1016/j.jhazmat.2007.09.010
DO - 10.1016/j.jhazmat.2007.09.010
M3 - Article
C2 - 17935881
AN - SCOPUS:40949163792
SN - 0304-3894
VL - 153
SP - 663
EP - 669
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 1-2
ER -