Humic Acid Toxicity in Biologically Treated Soil Contaminated with Polycyclic Aromatic Hydrocarbons and Pentachlorophenol
Humic Acid Toxicity in Biologically Treated Soil Contaminated with Polycyclic Aromatic Hydrocarbons and Pentachlorophenol
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DOI：
10.1007/s00244-004-0138-5
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发表时间：
2005-09
影响因子：
4
通讯作者：
J. Nieman;R. Sims;D. Sorensen;J. McLean
中科院分区：
文献类型：
--
作者：
J. Nieman;R. Sims;D. Sorensen;J. McLean
从一个土地处理单元在利比地下水超级基金网站在利比，MT的污染土壤，修订与14 C芘和培养396天，以促进生物降解和土壤相关的结合残留物的形成。腐殖酸和富里酸从处理过的土壤微宇宙中提取，并分析芘残留的存在。生物活性促进14 C与富里酸组分的结合，但腐殖酸结合的14 C并不随着生物活性的增加而增加。采用富里酸闪速毒性试验对腐殖酸和富里酸组分的毒性进行了评价。富里酸对小鼠无毒性反应，而腐殖酸对小鼠有明显的毒性反应。所观察到的毒性可能与五氯苯酚有关，五氯苯酚是一种已知的土壤污染物，通过腐殖酸的溶剂萃取去除，与毒性降低密切相关。
Contaminated soil from a land treatment unit at the Libby Groundwater Superfund Site in Libby, MT, was amended with14C pyrene and incubated for 396 days to promote biodegradation and the formation of soil-associated bound residues. Humic and fulvic acids were extracted from the treated soil microcosms and analyzed for the presence of pyrene residues. Biologic activity promoted14C association with the fulvic acid fraction, but humic acid–associated14C did not increase with biologic activity. The Aboatox flash toxicity assay was used to assess the toxicity of humic and fulvic acid fractions. The fulvic acid gave no toxic response, but the humic acid showed significant toxicity. The observed toxicity was likely associated with pentachlorophenol, a known contaminant of the soil that was removed by solvent extraction of the humic acid and that correlated well with toxicity reduction.