Evaluation of biochars in reducing the bioavailability of flubendiamide in water/sediment using passive sampling with polyoxymethylene

文献类型: 外文期刊

第一作者: Liu, Xingang

作者: Liu, Xingang;Wu, Xiaohu;Xu, Jun;Dong, Fengshou;Zheng, Yongquan;Liu, Xingang

作者机构:

关键词: Flubendiamide;Polyoxymethylene;Freely dissolved concentration;Bioavailability;Biochar

期刊名称:JOURNAL OF HAZARDOUS MATERIALS ( 影响因子:10.588; 五年影响因子:10.129 )

ISSN: 0304-3894

年卷期: 2018 年 344 卷

页码:

收录情况: SCI

摘要: An equilibrium passive sampler based on POM was first used to determine the C-free of flubendiamide in water/sediment systems. The adsorption of flubendiamide by POM followed a first-order one-compartment uptake model and the POM-water partition coefficient was 1.90: The method was used to compare the efficiency of three biochars which were produced from crofton weed (BC-1, 500 degrees C), macadamia (BC-2, 550-660 degrees C) and wheat straw (BC-3, 550 degrees C). The Freundlich fit the sorption isotherm data well and the adsorption capacity was BC-1 > BC-3 > BC-2. The percent removal of the BC-1 was higher in acidic solutions. When different doses of BC-1 were added to two sediments, the Cfree of the flubendiamide was higher in the sediment with a low organic matter content (S-1). With an increase of BC-1, the C-free was significantly reduced in S-1. A 30-day period of biochar-sediment contact time was sufficient for a reduction of freely dissolved flubendiamide in the case of the two sediments tested. In the combination of biochar addition (5%) and aging time (30 days), the maximum reductions were 87% and 60% in S-1 and S-2. Therefore, the reduction of bioavailability of the flubendiamide and pollution repair can be achieved by this process. (C) 2017 Published by Elsevier B.V.

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