环境监测管理与技术
環境鑑測管理與技術
배경감측관리여기술
THE ADMINISTRATION AND TECHNIQUE OF ENVIRONMENTAL MONITORING
2014年
4期
48-50
,共3页
氰化物%浸出液%分光光度法%固体废物
氰化物%浸齣液%分光光度法%固體廢物
청화물%침출액%분광광도법%고체폐물
Cyanide%Leaching fluid%Solid waste
用金矿废渣样品进行氰化物的浸提试验，对浸提剂的 pH 值、浸提次数等条件进行优化。经实际样品验证，确定 pH值＞12的碱性水溶液为最佳浸提剂，浸出液中易释放氰化物和总氰化物可用硝酸银滴定法或异烟酸-巴比妥酸分光光度法测定，方法检出限分别为0．25 mg/L、0．001 mg/L，加标回收率为90．0％～92．0％，测定结果的 RSD＜8％。
用金礦廢渣樣品進行氰化物的浸提試驗，對浸提劑的 pH 值、浸提次數等條件進行優化。經實際樣品驗證，確定 pH值＞12的堿性水溶液為最佳浸提劑，浸齣液中易釋放氰化物和總氰化物可用硝痠銀滴定法或異煙痠-巴比妥痠分光光度法測定，方法檢齣限分彆為0．25 mg/L、0．001 mg/L，加標迴收率為90．0％～92．0％，測定結果的 RSD＜8％。
용금광폐사양품진행청화물적침제시험，대침제제적 pH 치、침제차수등조건진행우화。경실제양품험증，학정 pH치＞12적감성수용액위최가침제제，침출액중역석방청화물화총청화물가용초산은적정법혹이연산-파비타산분광광도법측정，방법검출한분별위0．25 mg/L、0．001 mg/L，가표회수솔위90．0％～92．0％，측정결과적 RSD＜8％。
Determining of cyanide in solid wastes was investigated,using a kind of slag waste as actual sam-ple.Experimental conditions such as the pH of leaching fluid and extraction times were optimized.It had been verified by the actual sample that alkaline solution(pH≥12)could be used as the best extraction fluid.Easily literatable cyanide and total cyanide in leaching liquid could be measured by silver nitrate volumetric and nicotin-ic-barbituric spectrophotometry method.The method detection limits come to be 0.25 mg/L and 0.001 mg/L, the recoveries ranged from 90.0% to 92.0%,and the precision was lower to 8%.
