β-环糊精基复合水凝胶吸附磷酸三(2-氯乙基)酯的效能与机制  

Adsorption performance and mechanism of β-cyclodextrin based composite hydrogel towards tris(2-chloroethyl)phosphate

作　　者：李俊仪 张达鑫[3,4] 王毅力[3] LI Junyi;ZHANG Daxin;WANG Yili(Post-doctorate Scientific Research Station Shengli Oil Administration,SINOPEC,Dongying 257000,China;Sinopec Shengli Oilfield Technical Testing Center,SINOPEC,Dongying 257000,China;College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China;School of Soil&Water Conservation,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]中国石化胜利油田分公司博士后流动站,东营257000 [2]中国石化胜利油田技术检测中心,东营257000 [3]北京林业大学环境科学与工程学院,北京100083 [4]北京林业大学水土保持学院,北京100083

出　　处：《环境工程学报》2025年第1期40-50,共11页Chinese Journal of Environmental Engineering

基　　金：国家“十三五”重点研发计划“三峡库区面源污染植被削减过程与技术研究”资助项目(2017YFC0505303);胜利油田分公司博士后资助项目(YKB2213)。

摘　　要：为有效吸附去除水中的有机磷阻燃剂磷酸三(2-氯乙基)酯(TCEP),采用三元单体共聚法成功制备出了β-环糊精-三甲基氯化铵-丙烯酰胺复合水凝胶(CDN-AM-CH)吸附剂,研究了CDN-AM-CH对TCEP的吸附去除性能,并解析了相关的吸附机理。结果表明,CDN-AM-CH中成功引入了−NH_(2),且具有片层状结构和水凝胶网络结构。在25℃和150 r·min^(−1)条件下CDN-AM-CH对初始质量浓度为200 mg·L^(−1)TCEP的最大吸附量为126.26 mg·g^(−1),吸附平衡时间为8 h,pH适用范围宽(3~11),在盐度及有机物的存在下仍有较好的TCEP吸附能力,且5次循环使用后仍能保持97.1%的吸附容量。此外,在组成更为复杂的实际污染水体中,CDN-AM-CH保持了对TCEP较高的吸附量。吸附机理解析发现,CDN-AM-CH中的环糊精主体结构和-NH_(2)基团提供了环糊精包合作用和氢键结合的双重作用。Aβ-cyclodextrin-trimethylammonium chloride-acrylamide composite hydrogel(CDN-AM-CH)absorbent was successfully prepared by the ternary monomer copolymerization method to effectively remove the tri(2-chloroethyl)phosphate(TCEP),a kind of organophosphorus flame retardant.Both the adsorption performance of CDN-AM-CH to TCEP and the related mechanisms were investigated.The results showed that the prepared hydrogel absorbent illustrated a lamellar and gel network structure with the−NH_(2) group.Under the conditions of 25℃and 150 r·min^(−1),CDN-AM-CH had a maximum adsorption capacity of 126.26 mg·g^(−1)towards TCEP with an initial concentration of 200 mg·L^(−1).The adsorption equilibrium time was 8 h.The applicable pH range was wide within 3~11.Moreover,CDN-AM-CH still had a good TCEP adsorption performance in the presence of salinity and organic matter,and could still maintain 97.1%adsorption capacity after five adsorption-desorption cycles.In addition,for TCEP in actual polluted water bodies with more complex components,high adsorption amount by CDN-AM-CH also occurred.The mechanisms analysis showed that the main structure of cyclodextrin and−NH_(2) group in CDN-AM-CH played the dual roles of inclusion and hydrogen bonding during the adsorption process.

关 键 词：Β-环糊精 复合水凝胶 磷酸三(2-氯乙基)酯(TCEP) 吸附性能 包合作用 氢键 

分 类 号：X522[环境科学与工程—环境工程]