Mechanism of biochar functional groups in the catalytic reduction of tetrachloroethylene by sulfides

Yang Yadong; Piao Yunxian; Wang RuofanSu YaomingQiu JinrongLiu Na

首页> 外文期刊>Environmental Pollution >Mechanism of biochar functional groups in the catalytic reduction of tetrachloroethylene by sulfides

【24h】

Mechanism of biochar functional groups in the catalytic reduction of tetrachloroethylene by sulfides

机译：Mechanism of biochar functional groups in the catalytic reduction of tetrachloroethylene by sulfides

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

In recent years, biochar has become of considerable interest for environmental applications, it can be used as a catalyst for sulfides reduction of perchloroethylene, but the crucial role of biochar properties played in catalyzing dechlorination remained ambiguous investigation. To pinpoint the critical functional groups, the modified biochars were respectively produced by HNO3, KOH and H2O2 with similar dimensional structures but different functional groups. Combined with the adsorption and catalytic results of different biochars, the acid-modified biochar had the best catalytic performance (99.9 removal) due to the outstanding specific surface area and ample functional groups. According to characterization and DFT results, carboxyl and pyridine nitrogen exhibited a positive correlation with the catalytic rate, indicating that their contribution to catalytic performance. Customizing biochar with specific functional groups removed depth demonstrated that the carboxyl was essential component. Further, alkaline condition was conducive to catalytic reduction, while tetrachloroethylene cannot be reduced under acidic conditions, because HS- and S2- mainly existed in alkaline environment and the sulfur-containing nucleophilic structure formed with biochar was more stable under this condition. Overall, this study opens new perspectives for in situ remediation by biochar in chlorinated olefin polluted anoxic environment and promotes our insight of modifying for biochar catalyst design.

著录项

来源
《Environmental Pollution》 |2022年第5期|118921.1-118921.10|共10页
作者
Yang Yadong; Piao Yunxian; Wang RuofanSu YaomingQiu JinrongLiu Na;
展开▼
作者单位

Jilin Univ, Coll Environm & Resources, Key Lab Groundwater Resources & Environm, Minist Educ, Changchun 130021, Peoples R China;

MEP, South China Inst Environm Sci, Guangzhou 510530, Peoples R China;

Jilin Univ, Coll Environm & Resources, Key Lab Groundwater Resources & Environm, Minist Educ, Changchun 130021, Peoples R China|Jinan Univ, Inst Groundwater & Earth Sci, Guangzhou 510632, Peoples R China;

展开▼
收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类
关键词
Biochar; Tetrachloroethylene; Sulfide; Functional groups;

Mechanism of biochar functional groups in the catalytic reduction of tetrachloroethylene by sulfides

摘要

著录项

相关主题

期刊订阅