Immobilization of pentachlorophenol in soil using carbonaceous material amendments.
In this study, three pentachlorophenol (PCP) laboratory-spiked and one field-contaminated soil were amended with 2.0% char, humic acid (HA) and peat, respectively. The amended soils were aged for either 7 or 250 days. After amendment, CaCl(2) extractability of PCP was significantly decreased. Desorption kinetics indicated that the proposed amendment could lead to a strong binding and slow desorption of PCP in soils. Amendment with char reduced the bioaccumulation factor (BAF) of PCP most significantly for earthworms (Eisenia fetida) in all soils studied. The results of both physicochemical and biological tests suggested that amendment reduced PCP bioavailability quickly and enduringly, implying that carbonaceous material amendment, especially char amendment, was a potentially attractive in situ remediation method for sequestration of PCP in contaminated soil.
Wen
Bei
B
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road, Haidian District, Beijing 100085, China.
Li
Rui-Juan
RJ
Zhang
Shuzhen
S
Shan
Xiao-Quan
XQ
Fang
Jing
J
Xiao
Ke
K
Khan
Shahamat U
SU
D002122:Calcium Chloride / Q000494:pharmacology; D052918:Environmental Restoration and Remediation / Q000379:methods*; D019015:Geologic Sediments; D006812:Humic Substances; D010416:Pentachlorophenol / Q000032:analysis; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis
D006812:Humic Substances; D012987:Soil; D012989:Soil Pollutants; D010416:Pentachlorophenol; D002122:Calcium Chloride