文献类型：期刊文献

中文题名：二价铁催化过碳酸钠处理水中乙苯

英文题名：Degradation of ethylbenzene by Fe(Ⅱ) activated sodium percarbonate process in aqueous solution

作者：崔航[1];傅晓日[1];顾小钢[1,2];吕树光[1];邱兆富[1];隋倩[1]

机构：[1]华东理工大学,国家环境保护化工过程环境风险评价与控制重点实验室,上海市功能性材料化学重点实验室,上海200237;[2]华东理工大学,化学工程联合国家重点实验室,上海200237

年份：2016

卷号：36

期号：5

起止页码：1449

中文期刊名：中国环境科学

外文期刊名：China Environmental Science

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金(41373094,51208199);中国博士后科学基金(2015M570341);中央高校基本科研业务费专项资金(22A201514057)

语种：中文

中文关键词：乙苯;过碳酸钠;羟基自由基;地下水修复

外文关键词：ethylbenzene; sodium percarbonate; hydroxyl radical; groundwater remediation

摘要：采用Fe(Ⅱ)催化过碳酸钠(SPC)体系处理水溶液中的乙苯(EB),考察c(SPC)、c(Fe(Ⅱ))、阴离子浓度、天然有机物(NOM)以及溶液初始pH值对EB降解效果的影响,并确定EB降解过程中起主导作用的自由基.结果表明,对于浓度为1mmol/L的EB溶液,c(SPC)、c(Fe(Ⅱ))均为12mmol/L时,20min内EB可被完全去除;Cl^-、HCO_3^-、NOM的存在均会抑制EB降解,SO_4^(2-)和NO_3^-对EB降解无影响;溶液初始pH值(pH3.00~11.00)越高,EB去除率越低,但当pH=9时,降解效果仍很显著,表明该体系能够在较宽pH值范围内高效降解水溶液中EB;自由基探针试验证实体系中存在·OH和O_2^(·-),自由基清扫试验表明·OH对EB降解起主导作用.
Ethylbenzene（EB） degradation performance in Fe（Ⅱ） activated sodium percarbonate（SPC） system was investigated in this study.The effects of various factors,such as the initial SPC and Fe（Ⅱ） concentrations,anions（Cl^-,HCO_3^-,SO_4^（2-）,and NO_3^-） concentration,natural organic matters（NOM）,and initial solution p H were evaluated.The results showed that EB（1mmol/L） could be degraded completely in 20 min with both SPC and Fe（Ⅱ） dosages of 12mmol/L.Both Cl^-and HCO_3^-anions and NOM had significant inhibitive effect on EB degradation,while the influence of SO_4^（2-）and NO_3^-was negligible at the tested ionic strength ranges.The EB removal was still significant at the initial solution p H of 9 even though the degradation of EB decreased with the increasing of initial solution p H（from 3.0 to 11.0）,suggesting that Fe（Ⅱ） activated SPC process was an effective technique for EB degradation at a wider p H range.In addition,the results of free radical probe tests and free radical scavenger tests indicated that ·OH was the predominant species responsible for EB degradation even though both ·OH and O_2^（·-）were generated in the SPC-Fe（Ⅱ） system.