摘要
为选出适用于地下水环境的四氯乙烯增溶试剂,选用高效绿色表面活性剂烷基糖苷及其与β-环糊精、异丙醇的复配体系对四氯乙烯进行增溶,分别考察了溶液浓度、环境温度和无机盐浓度变化对四氯乙烯增溶效果的影响,并筛选出最佳的复配组合.结果表明,烷基糖苷的临界胶束浓度约为100 mg·L^(−1),初级生物降解度为91%;烷基糖苷复配体系对四氯乙烯的增溶效果明显优于单一体系,且增溶能力随体系浓度增大而增强;复配体系的增溶能力随环境温度降低而略有降低,在一定范围内随无机盐浓度升高而先升高后降低.烷基糖苷增溶四氯乙烯的最佳复配组合为:烷基糖苷浓度10000 mg·L^(−1),β-环糊精浓度3750 mg·L^(−1),异丙醇体积浓度2.5%,该复配组合具备良好的增溶能力及抗低温、抗盐性能.该体系的筛选可为后续场地修复中提供一定的实验依据.
In order to screen out suitable tetrachloroethylene solubilizing reagent which can be used in groundwater environment,the high efficient,green surfactant alkyl glycoside and its compounded system withβ-cyclodextrin and isopropanol were used to solubilize PCE.The critical micelle concentration and primary biodegradability of alkyl glycosides were determined.The influence of solution concentration,ambient temperature and electrolyte concentration on solubilization effect of PCE were investigated,and the optimal combination of compounded system was finally determined.The results show that the critical micelle concentration of alkyl glycosides is about 100 mg·L^(−1),and the primary biodegradability is 91%.The solubilization effect of the APG compounded system is better than that of the single system.The solubilization ability of the compound system decreases slightly with the decrease of ambient temperature,and increases first and then decreases with the increase of electrolyte concentration in a certain range.The optimal combination of APG compounded system is as follows:the concentration of APG is 10000 mg·L^(−1),the concentration ofβ-cyclodextrin is 3750 mg·L^(−1) and the volume concentration of isopropanol is 2.5%.The combination has good solubilization ability,low-temperature resistance and salt resistance.The screening of this system can provide some experimental basis for subsequent site restoration.
作者
姜迪瀚
董军
梁雪
马冠群
JIANG Dihan;DONG Jun;LIANG Xue;MA Guanqun(College of New Energy Resource and Environment,Jilin University,Changchun,130021,China;National and Local Joint Engineering Laboratory of Petrochemical Contaminated Site Control and Remediation Technology,Jilin University,Changchun,130021,China)
出处
《环境化学》
CAS
CSCD
北大核心
2022年第12期3916-3924,共9页
Environmental Chemistry
基金
国家重点研发计划(2020YFC1808202)
国家自然科学基金(42077167)资助.
关键词
烷基糖苷
四氯乙烯
增溶
地下水
alkyl glycoside
perchloroethylene
solubilization
groundwater
