...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Use of model soil colloids to evaluate adsorption of phenanthrene and its mobilization by different solutions
【24h】

Use of model soil colloids to evaluate adsorption of phenanthrene and its mobilization by different solutions

机译：使用模型土壤胶体评估菲的吸附及其在不同溶液中的迁移

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

Inorganic (a montmorillonite; a complex of montmorillonite and aluminium hydroxide) and organo-mineral model soil colloids (a complex of montmorillonite, aluminium hydroxide and humic acid) were tested for their capacity to adsorb and desorb phenanthrene. The adsorption-desorption isotherms demonstrated that the inorganic surfaces were able to bind the pollutant, although to a lesser extent than the organo-mineral complex. The capacity of different aqueous solutions to desorb phenanthrene after 1, 7, and 30 days' contact with the model colloids was tested in order to assess their efficacy with respect to the aging effect. The solutions used were 0.01 N CaCl_2, dissolved soil organic matter (DOM), a model root exudates solution (aqueous solution of saccharose, fructose, glucose, fumaric acid, ferrulic acid, and leucine), and three commercial surfactants (sodium dodecyl sulfate, Tween 20, and didecyldimethylammonium bromide). The desorptive capacity of these solutions were compared with that of organic solutions (water-ethanol and n-hexane-ethanol). More than 85% phenanthrene was desorbed after 30 days aging by organic solutions. Among the aqueous solutions, the best results were obtained with dissolved soil organic matter solution and the model root exudates solution which were able to desorb up to 50% phenanthrene after 30 days aging. Such naturally occurring aqueous solutions should be preferred to synthetic compounds to mobilize phenanthrene in contaminated sites without further contaminating the environment.
机译：测试了无机（蒙脱石；蒙脱石与氢氧化铝的复合物）和有机矿物模型土壤胶体（蒙脱石，氢氧化铝与腐殖酸的复合物）吸附和解吸菲的能力。吸附-解吸等温线表明，无机表面能够与污染物结合，尽管程度小于有机-无机配合物。测试了不同水溶液与模型胶体接触后1、7和30天解吸菲的能力，以评估它们在老化效果方面的功效。使用的溶液为0.01 N CaCl_2，溶解的土壤有机质（DOM），模型根分泌液溶液（蔗糖，果糖，葡萄糖，富马酸，阿魏酸和亮氨酸的水溶液）和三种市售表面活性剂（十二烷基硫酸钠，吐温20和二癸基二甲基溴化铵）。将这些溶液的吸附能力与有机溶液（水-乙醇和正己烷-乙醇）的吸附能力进行了比较。 30天老化后，有机溶液可解吸超过85％的菲。在水溶液中，使用溶解的土壤有机物溶液和模型根系分泌物溶液可获得最佳结果，这些溶液能够在30天老化后解吸高达50％的菲。此类天然存在的水溶液应优先于合成化合物，以在受污染的位置动员菲而不进一步污染环境。

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