...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >SORPTION AND DIALYSIS EXPERIMENTS TO ASSESS THE BINDING OF PHENOLIC XENOBIOTICS TO DISSOLVED ORGANIC MATTER IN SOIL
【24h】

SORPTION AND DIALYSIS EXPERIMENTS TO ASSESS THE BINDING OF PHENOLIC XENOBIOTICS TO DISSOLVED ORGANIC MATTER IN SOIL

机译：酚类异种生物与溶解性有机物结合的吸附和渗析实验

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The binding of two phenolic compounds, nonylphenol (NP) and bisphenol A (BPA), and the herbicide metabolite hydroxydesethyl terbuthylazine (HDT) to dissolved organic matter (DOM) as well as its impact on the environmental fate of the compounds in soil have been investigated. In sorption studies with an acidic silty loam soil and a neutral loam soil, no impact of added DOM on adsorption and desorption coefficients was observed. Adsorption coefficients normalized to soil organic carbon (K_(oc)) of the compounds on the loamy silt soil spanned three orders of magnitude: 90, 890, and 9,140 L/kg for HDT, BPA, and NP, respectively. Significantly lower K_(oc) values for HDT on the neutral loam soil as compared to the acidic loamy silt soil indicated additional polar interactions between the latter and the basic herbicide metabolite. In dialysis experiments with fulvic acid from silty loam soil (FA) and peat humic acid (HA), a formation of analyte-DOM associates was observed only for HA. The degree of association was characterized by distribution coefficients normalized to the dissolved organic carbon concentration (K_(DOC)). Values for NP (8,970 L/kg) and BPA (860 L/kg) corresponded with the respective soil sorption coefficients, suggesting similar binding mechanisms in both cases.
机译：壬基酚（NP）和双酚A（BPA）这两种酚类化合物以及除草剂代谢物羟基脱乙基叔丁基噻嗪（HDT）与溶解有机物（DOM）的结合及其对化合物在土壤中环境命运的影响调查。在酸性粉质壤土和中性壤土的吸附研究中，未观察到添加的DOM对吸附和解吸系数的影响。相对于土壤有机碳（K_（oc））的化合物，在壤质粉质壤土上的吸附系数跨越三个数量级：HDT，BPA和NP分别为90、890和9,140 L / kg。与酸性壤质粉质粉土相比，中性壤质泥土上HDT的K_（oc）值明显较低，表明后者与碱性除草剂代谢物之间存在额外的极性相互作用。在用粉质壤土（FA）和泥炭腐殖酸（HA）制成的富里酸进行的透析实验中，仅HA观察到了分析物-DOM缔合体的形成。缔合度通过归一化为溶解有机碳浓度（K_（DOC））的分布系数来表征。 NP（8,970 L / kg）和BPA（860 L / kg）的值分别对应于土壤的吸附系数，表明在两种情况下相似的结合机理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号