摘要
采用溶胶—凝胶法合成了纳米级ZrO2,研究了纳米ZrO2对Cu(Ⅱ)的吸附,优化了吸附条件,探讨了洗脱条件.结果表明:纳米ZrO2在pH=9.0～11.0范围内对Cu(Ⅱ)的吸附率达到95%以上,在98℃时,以0.7 mol/L的HCl为洗脱剂,可定量洗脱纳米ZrO2所吸附的Cu(Ⅱ);考察了共存离子的影响,证明常见重金属离子无明显干扰.吸附容量为3.1 mg/g,富集倍数为50倍.回收的纳米ZrO2可重复使用.应用于样品分析,结果满意.
A new and simple method using nanometer-sized ZrO2 as a solid phase extractant coupled with spectrophotometry was proposed for determination of copper（Ⅱ）.The nanometer-sized ZrO2 was prepared through sol-gel method.And the adsorption pH curve、adsorption capacity was obtained.It was found that the fraction of adsorbed Cu2＋ was more than 95% under pH 9.0-11.0,and 0.7 mol·L-1 HCl was sufficient for complete elution.Nanometer-sized ZrO2 possesses a significant capacity（3.1 mg/g） for the adsorption of Cu2＋.The fraction of Cu2＋ absorbed on the recycled nanometer-sized ZrO2 still reached quite a high level,which showed that the nanometer-sized ZrO2 was reusable in practice.The study on interference of co-existing ions indicated that ZrO2 had high selectivity for copper ion.The method was applied to enrichment of trace copper（Ⅱ） in water samples with satisfactory results.
出处
《武汉工程大学学报》
CAS
2011年第5期25-27,33,共4页
Journal of Wuhan Institute of Technology
关键词
纳米ZRO2
铜
分离富集
吸附
nanometer-sized ZrO2
Cu
separation and enrichment
adsorption
