Reducing plant uptake of PAHs by cationic surfactant-enhanced soil retention.
Reducing plant uptake of PAHs by cationic surfactant-enhanced soil retention.
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DOI：
10.1016/j.envpol.2009.01.028
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发表时间：
2009-06
影响因子：
8.9
通讯作者：
Li Lu;Lizhong Zhu
中科院分区：
文献类型：
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作者：
Li Lu;Lizhong Zhu
减少污染物从土壤向植物的转移是在受污染的土壤上生产安全农产品的一种有希望的方法。本研究分别利用0 ~ 400mg/kg十六烷基三甲基溴化铵（CTMAB）和十二烷基溴化吡啶（DDPB）增强土壤对多环芳烃的吸附，从而减少多环芳烃从土壤到土壤溶液以及随后向植物的转移。在施用阳离子表面活性剂的污染土壤中生长的蔬菜中菲和芘的浓度低于未施用表面活性剂的对照土壤。其中，菊花（chrysanthemum coronarium L.）、甘蓝（Brassica campestris L.）、生菜（Lactuca sativa L.）对菲和芘的最大降幅分别为66%和51%、62%和71%、34%和53%。考虑到阳离子表面活性剂对植物生长和土壤微生物活性的影响，采用CTMAB较为合适，有效剂量为100-200mg /kg。
Reducing the transfer of contaminants from soils to plants is a promising approach to produce safe agricultural products grown on contaminated soils. In this study, 0–400mg/kg cetyltrimethylammonium bromide (CTMAB) and dodecylpyridinium bromide (DDPB) were separately utilized to enhance the sorption of PAHs onto soils, thereby reducing the transfer of PAHs from soil to soil solution and subsequently to plants. Concentrations of phenanthrene and pyrene in vegetables grown in contaminated soils treated with the cationic surfactants were lower than those grown in the surfactant-free control. The maximum reductions of phenanthrene and pyrene were 66% and 51% for chrysanthemum (Chrysanthemum coronarium L.), 62% and 71% for cabbage (Brassica campestris L.), and 34% and 53% for lettuce (Lactuca sativa L.), respectively. Considering the impacts of cationic surfactants on plant growth and soil microbial activity, CTMAB was more appropriate to employ, and the most effective dose was 100–200mg/kg.