CAJ | 학술논문

以聚氯乙烯为原料依次与四乙烯五胺、CS_2和ClCH_2COONa反应合成了一种新的含N、O、S的N-硫代酰基硫乙酸功能化三乙撑四胺交联聚氯乙烯螯合树脂,树脂结构经红外分析和元素分析表征. 探讨了在不同pH值、Hg~(2+)初始浓度、吸附温度和时间等条件下合成树脂对Hg~(2+)的吸附性能. 结果表明,螯合树脂对Hg~(2+)有较快的吸附速率,pH值约为2.0时,树脂对Hg~(2+)的吸附效果最好,随温度升高吸附量逐渐增大. 温度在35 ℃、Hg~(2+)起始浓度为17.66 mmol/L时,树脂对Hg~(2+)的吸附量可达3.330 mmol/g. 树脂对Hg~(2+)的吸附符合Langmuir和Freundlich等温式. 用0.2 mol/L HNO3-10%硫脲对吸附后的树脂进行洗脱,脱附率达99.20%.
이취록을희위원료의차여사을희오알、CS_2화ClCH_2COONa반응합성료일충신적함N、O、S적N-류대선기류을산공능화삼을탱사알교련취록을희오합수지,수지결구경홍외분석화원소분석표정. 탐토료재불동pH치、Hg~(2+)초시농도、흡부온도화시간등조건하합성수지대Hg~(2+)적흡부성능. 결과표명,오합수지대Hg~(2+)유교쾌적흡부속솔,pH치약위2.0시,수지대Hg~(2+)적흡부효과최호,수온도승고흡부량축점증대. 온도재35 ℃、Hg~(2+)기시농도위17.66 mmol/L시,수지대Hg~(2+)적흡부량가체3.330 mmol/g. 수지대Hg~(2+)적흡부부합Langmuir화Freundlich등온식. 용0.2 mol/L HNO3-10%류뇨대흡부후적수지진행세탈,탈부솔체99.20%.
A novel acidic N-thioacyl thioglycolic acid functionalized triethylentetramine crosslinked PVC resin was preparated from PVC, triethylenetetramine, CS_2 and ClCH_2COONa and characterized by FTIR and elemental analysis. Adsorption properties of the resin for Hg~(2+) were investigated under different conditions such as pH, temperature, contact time and the initial concentration of Hg~(2+). The results show that the adsorption of the resin for Hg~(2+) could rapidly reach balance, and it displayed a higher capacity when pH was about 2.0. The adsorption capacity of the resin for Hg~(2+) reached 3.330 mmol/g at 35 ℃ and 17.66 mmol/L Hg~(2+). The adsorption process was fitted to Langmuir and Freundlich isotherms in the studied concentration range. The loaded resin with Hg~(2+) was regenerated in an efficiency of 99.2% via 0.2 mol/L HNO_3-10% thiourea.