岩矿测试
巖礦測試
암광측시
ROCK AND MINERAL ANALYSIS
2014年
3期
369-373
,共5页
胡德新%武素茹%刘跃勇%王虹%王向东%李权斌%谷松海
鬍德新%武素茹%劉躍勇%王虹%王嚮東%李權斌%穀鬆海
호덕신%무소여%류약용%왕홍%왕향동%리권빈%곡송해
矿产品堆场土壤%镉%砷%铅%化学形态%改进BCR法%电感耦合等离子体发射光谱法
礦產品堆場土壤%鎘%砷%鉛%化學形態%改進BCR法%電感耦閤等離子體髮射光譜法
광산품퇴장토양%력%신%연%화학형태%개진BCR법%전감우합등리자체발사광보법
mineral yard soil%cadmium%arsenic%lead%chemical species%modified BCR method%Inductively Coupled Plasma-Atomic Emission Spectrometry
矿产品堆场土壤中重金属在环境中富集,随着元素的迁移、转化及地下水的循环,成为环境污染问题。本文将改进的顺序提取法( BCR)应用于矿产品堆场土壤中Cd、As、Pb的化学形态分析,结合这三种元素的性质,将堆场土壤中Cd、As、Pb分为可交换态、可还原态、可氧化态和残渣态,并利用电感耦合等离子体发射光谱法测定其含量。采用形态分析标准参考物质GBW 07436验证了三步提取态的准确性,并对6个矿产品堆场土壤中Cd、As、Pb形态含量进行分析,三步提取态加上残渣态质量分数之和与重金属总量进行了比较,回收率为85.54%~102.88%。通过对矿产品堆场土壤实际样品分析,Cd、As、Pb三种元素非残渣态含量顺序为Cd(79.40%~94.94%)﹥Pb(24.27%~37.73%)﹥As(22.89%~31.51%),表明Cd元素较为容易进入生物圈。该方法解决了港口堆场土壤中重金属化学形态提取问题,对污染土壤的治理具有指导意义。
礦產品堆場土壤中重金屬在環境中富集,隨著元素的遷移、轉化及地下水的循環,成為環境汙染問題。本文將改進的順序提取法( BCR)應用于礦產品堆場土壤中Cd、As、Pb的化學形態分析,結閤這三種元素的性質,將堆場土壤中Cd、As、Pb分為可交換態、可還原態、可氧化態和殘渣態,併利用電感耦閤等離子體髮射光譜法測定其含量。採用形態分析標準參攷物質GBW 07436驗證瞭三步提取態的準確性,併對6箇礦產品堆場土壤中Cd、As、Pb形態含量進行分析,三步提取態加上殘渣態質量分數之和與重金屬總量進行瞭比較,迴收率為85.54%~102.88%。通過對礦產品堆場土壤實際樣品分析,Cd、As、Pb三種元素非殘渣態含量順序為Cd(79.40%~94.94%)﹥Pb(24.27%~37.73%)﹥As(22.89%~31.51%),錶明Cd元素較為容易進入生物圈。該方法解決瞭港口堆場土壤中重金屬化學形態提取問題,對汙染土壤的治理具有指導意義。
광산품퇴장토양중중금속재배경중부집,수착원소적천이、전화급지하수적순배,성위배경오염문제。본문장개진적순서제취법( BCR)응용우광산품퇴장토양중Cd、As、Pb적화학형태분석,결합저삼충원소적성질,장퇴장토양중Cd、As、Pb분위가교환태、가환원태、가양화태화잔사태,병이용전감우합등리자체발사광보법측정기함량。채용형태분석표준삼고물질GBW 07436험증료삼보제취태적준학성,병대6개광산품퇴장토양중Cd、As、Pb형태함량진행분석,삼보제취태가상잔사태질량분수지화여중금속총량진행료비교,회수솔위85.54%~102.88%。통과대광산품퇴장토양실제양품분석,Cd、As、Pb삼충원소비잔사태함량순서위Cd(79.40%~94.94%)﹥Pb(24.27%~37.73%)﹥As(22.89%~31.51%),표명Cd원소교위용역진입생물권。해방법해결료항구퇴장토양중중금속화학형태제취문제,대오염토양적치리구유지도의의。
Heavy metal elementals can be enriched in soil at mineral products yard,which become a problem of environmental pollution caused by elemental migration,transformation and circulation in underground water. In this experimentation the modified BCR sequential extraction method was applied to the chemical species analysis of Cd, As and Pb. Based on the properties of these three elementals,the chemical species of Cd,As and Pb were divided into four fractions:exchangeable,reducible,oxidizable and residual,and Inductively Coupled Plasma-Atomic Emission Spectrometry( ICP-AES)were used to measure the content of Cd,As and Pb. Morphological analysis standard reference material GBW 07436 was conducted to verify the accuracy of the three step extraction state. Contents of chemical species of Cd,As and Pb in soil from six mineral products yard were analyzed,including contents of three step extraction state plus the residual and the total contents of the desired metals elements. The recoveries were from 84 . 54% to 102 . 88%. The analysis results for actual samples demonstrated the contents of Cd,As and Pb in non-residual fraction were in order as Cd(79. 40% -94. 94%)﹥Pb(24. 27% -37. 73%)﹥As( 22. 89% -31. 51%),which indicated Cd is easy to enter the biosphere. This method has resolved the problem to extract the chemical species of heavy metal elements in soil from port mineral products yard,and has profound significance to the treatment of contaminated soil.