摘要
【目的】重金属镉及其化合物对人体有一定的毒性。研究吸附材料对农业环境水样中重金属镉离子的分离富集性能,为对农业用水的水质进行监测提供参考。【方法】从工作液酸度、上柱流速、洗脱剂流速等方面研究了中孔分子筛Ti-MCM-48材料对农业环境水样中痕量重金属镉离子的分离富集性能。【结果】在pH为6.0时镉离子被吸附完全,再用5mL 1.0mol/L HCl洗脱可达到分离富集的效果。【结论】方法应用于农村环境水样中痕量Cd^(2+)的测定,镉单项指标符合国家Ⅰ类水质标准,加标回收率在93.52%~106.21%之间;桂林农村环境水中镉含量较低,用于生活饮用、灌溉农作物的镉风险较低。
[ Objective ] Since heavy metal cadmium and its compounds have certain toxicity to human body,it becomes a desirable aim to study properties of adsorption material on separating and enriching the heavy metal cadmium ions in agricultural environmental water samples, shedding some light on monitoring. [ Method ] In terms of solution acidity, upper column flow rate and eluent flow rate, studied are properties of mesoporous molecular sieve Ti-MCM-48 on separating and enriching the trace heavy metal cadmium ions in agricultural environmental water samples. [ Result ] Cadmium ions are adsorbed completely at pH 6. 0, and the effect of separation and enrichment could be achieved by eluting with 5mL 1.0mol/L HCl. [ Conclusion ] When this method is applied to the determination of trace Cd2＋ in rural environmental water samples, single indicator of cadmium meets the national water quality standard （ Grade I）, with recovery rate between 93.52%- 106.21%; content of cadmium in the rural water in Guilin is relatively low, therefore drinking and crops irrigation are rather safe from cadmium risk.
作者
毛燕芬
汪艳阳
陆海荣
张春云
阳美秀
Mao Yan-fen;et al(Agricuhural Ecology and Resource Protection Station in Guilin, Guangxi Zhuang Autonomous Region, Guilin, Guangxi 541213, China)
出处
《广西农学报》
2017年第6期31-32,82,共3页
Journal of Guangxi Agriculture
关键词
镉
分离
富集
农业环境水
cadmium
separation
enrichment
agricuhural environmental water
