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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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半胱氨酸改性介孔材料对Hg(Ⅱ)高选择性分离富集性能研究
DOI: 10.3724/SP.J.1096.2013.20363, PP. 93-97
Keywords: 半胱氨酸,介孔材料,Hg2＋,选择性,分离富集
Abstract:
采用后移植方法,将半胱氨酸键入到介孔材料SBA-15上,并对此材料的吸附条件进行了优化,研究了其对重金属离子Hg2＋的富集特性。考察了溶液pH值、吸附时间和材料用量等因素对Hg2＋吸附率的影响。在pH2.5,性质相近的金属离子Cu2＋、Cr6＋、Cr3＋、Cd2＋共存时,半胱氨酸改性的SBA-15介孔材料对Hg2＋可进行选择性吸附富集,富集后可用含5%硫脲的1mol/LHCl溶液快速洗脱。方法对Hg2＋的检出限为0.07μg/L,相对标准偏差为2.2%(CHg2＋＝1.0mg/L,n＝11)。将本方法用于污水样品中Hg2＋的测定,回收率为92%-101%。
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