采用乙二胺对氯甲基化聚苯乙烯树脂进行改性,利用改性后的树脂去除溶液中的铅(Ⅱ)和铬(Ⅵ)。通过改变pH、时间、浓度和吸附剂投加量,确定最佳吸附实验条件,得到改性后的树脂对铅(Ⅱ)和铬(Ⅵ)的最大吸附容量分别为119.60mg/g和128.28mg/g。动力学研究表明,该模型符合Langmuir模型。
The current study aimed to modify chloromethylated polystyrene resin with ethylenediamine,and the modified resin was utilized to eliminate lead(Ⅱ) and chromium(Ⅵ) from the solution.The optimum adsorption experimental parameters were identified by varying pH,time,concentration,and adsorbent dosage,resulting in a maximum adsorption capacity of 119.60mg/g and 128.28mg/g for lead(Ⅱ) and chromium(Ⅵ),respectively.Furthermore,the kinetic studies indicated that the model accorded with the Freundlich model.
[1] Dobriyal P,Qureshi A,Badola R,et al.A review of the methods available for estimating soil moisture and its implications for water resource management[J].Journal of Hydrology,2012,458-459:110-117.
[2] El Nemr A,Khaled A,Ola A,et al.Treatment of wastewater containing toxic chromium using new activated carbon developed from date palm seed[J].Journal of Hazardous Materials,2008,152:263-275.
[3] Geetha P,Latha M S,Pillai S S,et al.Nanoalginate based biosorbent for the removal of lead ions from aqueous solutions:equilibrium and kinetic studies[J].Ecotoxicology and Environmental Safety,2015,122:17-23.
[4] Wang Q,Wang B,Lee X,et al.Sorption and desorption of Pb(Ⅱ) to biochar as affected by oxidation and pH[J].Science of the Total Environment,2018,634:188-194.
[5] Lalhruaitluanga H,Jayaram K,Prasad M,et al.Lead(Ⅱ) adsorption from aqueous solutions by raw and activated charcoals of Melocanna baccifera Roxburgh (bamboo)—a comparative study[J].Journal of Hazardous Materials,2010,175:311-318.
[6] Sölener M,Tunali S,Özcan A S,et al.Adsorption characteristics of lead(Ⅱ) ions onto the clay/poly (methoxyethyl) acrylamide (PMEA) composite from aqueous solutions[J].Desalination,2008,223:308-322.
[7] Inyang M I,Gao B,Yao Y,et al.A review of biochar as a low-cost adsorbent for aqueous heavy metal removal[J].Critical Reviews in Environmental Science and Technology,2016,46(4):406-433.
[8] Lindholm-Lehto P C.Biosorption of heavy metals by lignocellulosic biomass and chemical analysis[J].BioResources,2019,14:4952-4995.
基金资助
国家自然科学基金(42077370)
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