逆王水电热板方法消解水和废水中的银  

Discussion on the Method of Inverse Aqua Regia Electric Heating Plate for the Digestion of Silver in Water and Wastewater

作　　者：段雪梅 曾俊源[1] 戴晓军 孙燕 张燕波 巢文军 DUAN Xuemei;ZENG Junyuan;DAI Xiaojun;SUN Yan;ZHANG Yanbo;CHAO Wenjun(Changzhou Environmental Monitoring Center of Jiangsu Province,Changzhou 213002,China;Chang Zhou University,Changzhou 213164,China)

机构地区：[1]江苏省常州环境监测中心,江苏常州213002 [2]常州大学,江苏常州213164

出　　处：《中国环境监测》2022年第3期157-162,共6页Environmental Monitoring in China

基　　金：国家标准制修订项目(943);国家自然科学基金资助项目(22075032)。

摘　　要：以感光行业废水、电镀工业废水为实验对象,优化了逆王水电热板消解银的回流时间和逆王水用量,建立了逆王水消解水质银的电热板消解方法。并对地下水、生活污水、电镀工业废水、感光行业废水开展加标回收实验。结果表明:采用逆王水消解,当消解液温度控制在80~95℃,回流时间为2 h,逆王水用量为3 mL HNO_(3)+1 mL HCl时,消解电镀工业废水、感光行业废水、生活污水及地下水中银的加标回收率为85.0%~115%,相对标准偏差为2.9%~6.4%。将该方法与《水质银的测定火焰原子吸收分光光度法》(GB 11907—1989)前处理方法开展比对,2种方法消解结果无显著差异。表明逆王水电热板消解方法可以用于水和废水中银火焰原子吸收分光光度法测定的前处理。The reflux time and the amount of inverse aqua regia were optimized by using photographic wastewater and electroplating wastewater.An electric heating plate digestion method for silver in water with inverse aqua regia was established.The recovery experiments of groundwater,domestic sewage,electroplating wastewater and photosensitive wastewater were carried out.The results showed that when the temperature of digestion solution was controlled at 80-95 ℃ and the reflux time was 2 h,the recovery rates of silver in groundwater,domestic sewage,electroplating wastewater and photographic wastewater were 85.0%-115% by standard addition of 1 volume of inverse aqua regia,the relative standard deviation was 2.9%-6.4%.This method was compared with the pretreatment method of GB 11907-1989,and there was no significant difference in digestion between the two methods.The results proved that the hot plate digestion method with inverse aqua regia can be used for the pretreatment of the determination of silver in water and wastewater.

关 键 词：逆王水 水和废水 银 电热板消解 

分 类 号：X832.02[环境科学与工程—环境工程]