新型交联壳聚糖水凝胶制备及其对重金属离子的吸附性能研究
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摘要
本文利用丙烯酸接枝壳聚糖和N,N′-亚甲基双丙烯酰胺交联制备了一种新型壳聚糖水凝胶,并通过静态吸附实验考察了水凝胶投加量、吸附时间、pH、温度以及金属离子初始浓度对其吸附性能的影响。实验结果表明:随着壳聚糖水凝胶投加量、吸附时间和温度的增加,壳聚糖水凝胶对重金属离子的吸附增强;pH越小越有利于壳聚糖水凝胶对重金属离子的吸附;重金属离子初始浓度的变化对壳聚糖水凝胶吸附影响较大。壳聚糖水凝胶对不同金属离子Pb~(2+)、Ni~(2+)、Cr~(3+)的吸附能力不同,在单一金属溶液中,壳聚糖水凝胶对Pb~(2+)的吸附能力要强于对Ni~(2+)、Cr~(3+)的吸附能力。
引文
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[13]张军丽,李瑞玲,张燕,等.改性壳聚糖吸附剂的合成及对镉离子的吸附性能[J].环境科学与技术,2011,34(7):87—89,170.
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[2]Singh A,Sharma R K,Agrawal M,et al.Health risk assessment of heavy metals via dietary intake of foodstuffs from the wastewater irrigated site of a dry tropical area of India[J].Food and Chemical Toxicology,2010,48(2):611-619.
[3]Singh J,Lee B.Reduction of environmental availability and ecological risk of heavy metals in automobile shredder residues[J].Ecological Engineering,2015,81:76-81.
[4]Gumpu M B,Sethuraman S,Krishnan U M,et al.A review on detection of heavy metal ions in water-An electrochemical approach[J].Sensors and Actuators B:Chemical,2015,213:515-533.
[5]Boamah P O,Huang Y,Hua M,et al.Sorption of heavy metal ions onto carboxylate chitosan derivatives—A minireview[J].Ecotoxicology and Environmental Safety,2015,116(0):113-120.
[6]Delmar K,Bianco-Peled H.The dramatic effect of small pH changes on the properties of chitosan hydrogels crosslinked with genipin[J].Carbohydrate Polymers,2015,127:28-37.
[7]胡惠媛,朱虹.壳聚糖及其衍生物对重金属离子的吸附[J].化学进展,2012(11):2212—2223.
[8]张小龙,张诚,龙昀光.重金属污染水体的高效环保处理技术及研究进展[J].环境保护科学,2010(05):29—32.
[9]Liu X,Zhang L Removal of phosphate anions using the modified chitosan beads:Adsorption kinetic,isotherm and mechanism studies[J].Powder Technology,2015,277(0):112-119.
[10]石晶晶,夏玥,张科登,等.交联壳聚糖微球的制备及其对不同pH有机染料的吸附性能[J].胶体与聚合物,2014(04):169—172.
[11]张燕,张军丽,潘庆才,等.改性壳聚糖处理污水中Ni(Ⅱ)的效果[J].环境工程学报,2012,6(9):3091-3095.
[12]Liu D,Li Z,Zhu Y,et al.Recycled chitosan nanofibril as an effective Cu(Ⅱ),Pb(Ⅱ)and Cd(Ⅱ)ionic chelating agent:Adsorption and desorption performance[J].Carbohydrate Polymers,2014,111(0):469-476.
[13]张军丽,李瑞玲,张燕,等.改性壳聚糖吸附剂的合成及对镉离子的吸附性能[J].环境科学与技术,2011,34(7):87—89,170.
[14]袁文,尹学琼,贺永宁,等.壳聚糖羧基化的研究进展[J].化学试剂,2007(05):277—280.