摘要
研究了羟丙基-β-环糊精溶液(HPCD)和表面活性剂(SDS)对多氯联苯(Aroclor1242)污染土壤的洗脱增效修复作用。通过中式柱淋洗-洗脱试验,分别采用不同浓度的HPCD和SDS对污染土壤中多氯联苯(Aroclor1242)进行洗脱,重蒸馏水、5g/L SDS以及10g/L SDS对污染土壤中Aroclor1242的洗脱率分别0.51%、2.93%、25.9%;而相同浓度的HPCD对污染土壤中Aroclor1242的洗脱率分别为0.62%、8.42%、18.3%;此外,研究还发现,HPCD在土壤中的滞留相对SDS较少。研究结果表明,利用HPCD的疏水空腔,土壤中的弱极性有机污染物可以得到较好的处理效果,HPCD类环境安全试剂可以减少SDS的土壤滞留对环境带来的二次污染隐患,HPCD可望为污染土壤治理提供一种更具有广泛应用前景的新思路。
This research studied the washing effect of hydroxypropyl-β-cyclodextrin（ HPCD） and Sodium Dodecyl Sulfate（ SDS） on the PCBs contaminated soil. Through column elution experiment,different concentrations of HPCD and SDS were applied to evaluate the elution efficiency of Aroclor1242 from contaminated soil. Results showed that 0. 51%,2. 93% and25. 9% of the Aroclor1242 was eluted by distilled water,5 g/L of SDS,and 10 g/L of SDS,respectively. When using HPCD solution with same concentration,0. 62%,8. 42% and 18. 3% of Aroclor1242 was eluted,respectively. Moreover,the study found that HPCD remain less in the soil than the SDS,indicating that weak polarity organics can be removed effectively from soil by HPCD,and secondary pollution brought by SDS can be avoided. It is expected that HPCD can be a promising alternative chemical to treatment the contaminated soil.
作者
刘宏
刘迅
LIU Hong;LIU Xun(School of Environmental Science ＆ Engineering, Suzhou University of Science Technology, Suzhou, Jiangsu 215000,China;School of Civil Engineering, Suzhou University of Science ＆ Technology, Suzhou, Jiangsu 215000, China)
出处
《四川环境》
2018年第2期1-6,共6页
Sichuan Environment
基金
江苏省苏州市苏州科技大学高层次人才引进科研启动基金(331711203
331711105)
国家自然科学基金青年基金项目(51708381)
