...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemical engineering journal >Degradation of 2,4-dichlorophenol by a novel iron based system and its synergism with Cd(II) immobilization in a contaminated soil
【24h】

Degradation of 2,4-dichlorophenol by a novel iron based system and its synergism with Cd(II) immobilization in a contaminated soil

机译：用新型铁基体系和污染土壤中的CD（II）固定的增效剂降解2,4-二氯苯酚

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

Nowadays, the remediation of heavy metals and organic compounds contaminated soil has been greatly growing attentions. In this paper, the feasibility of a novel biochar-supported zero valent iron (B-nZVI) based system for the degradation of 2,4-Dichlorophenol (2,4-DCP) and immobilization of Cd(II) in contaminated soil was firstly investigated. The most relevant findings revealed that persulfate (PS) could obviously improve the degradation of 2,4-DCP by B-nZVI process. Within 240 min, nearly 91% of 2,4-DCP degradation could be reached at reaction conditions of 40 mg kg(-1) 2,4-DCP, 6 mM PS, 3.0 g L-1 B-nZVI and pH 4.51. A much higher performance on the 2,4-DCP degradation was observed at acidic and aerobic conditions. A lower concentration of ethylene diamine tetraacetic acid (EDTA) exhibited a slight improvement of 2,4-DCP degradation, whereas humic acids (HA) exhibited a significant inhibitory effect on that. Radical scavenging tests revealed that SO4 center dot- was primarily involved in degradation reaction of 2,4-DCP by B-nZVI/PS process. A total of five intermediate products including 2-chlorohydroquinone, 3,5-dichlorocatechol, phenol, fumaric acid and acetic acid were generated in 2,4-DCP degradation process, whereas two Cd species such as Cd(OH)(2) and CdO were identified in Cd(II) immobilization process. A possible mechanism for the 2,4-DCP degradation and Cd(II) immobilization by B-nZVI/PS process was proposed.
机译：如今，重金属和有机化合物的修复受到污染的土壤的注意力大大增加。在本文中，首先是污染土壤中2,4-二氯苯酚（2,4-DCP）降解的新型生物炭支持的零价铁（B-NZVI）系统的可行性及其在受污染的土壤中的CD（II）的固定化调查。最相关的结果显示，过硫酸盐（PS）明显改善B-NZVI过程的2,4-DCP的降解。在240分钟内，在40mg kg（-1）2,4-DCP，6mm PS，3.0g L-1 B-NZVI和pH 4.51的反应条件下可以达到近91％的2,4-DCP降解降解。在酸性和有氧条件下观察到2,4-DCP降解的更高的性能。乙烯二胺四乙酸（EDTA）的较低浓度表现出2,4-DCP降解的略微改善，而腐殖酸（HA）对此表现出显着的抑制作用。激进的清除试验显示SO4中心点主要参与B-NZVI / PS过程2,4-DCP的降解反应。在2,4-DCP降解过程中产生总共五种中间产物，包括2-氯氢醌，3,5-二氯替肽，苯酚，富马酸和乙酸，而两个CD物种如CD（OH）（2）和CDO在CD（II）固定过程中鉴定出来。提出了通过B-NZVI / PS过程的2,4-DCP降解和CD（II）固定的可能机制。

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