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首页> 外文会议>Proceedings of the 3rd IASTED international conference on environmental management and engineering; Proceedings of the 1st IASTED international conference on unconventional oils and the environment. >EXTRACTION OF HEAVY METALS BY PHOSPHATE AND OXALATE FROM A CONTAMINATED SOIL
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EXTRACTION OF HEAVY METALS BY PHOSPHATE AND OXALATE FROM A CONTAMINATED SOIL

机译：磷酸盐和草酸盐从污染土壤中萃取重金属。

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摘要

Laboratory batch experiments were conducted to studyrnarsenic (As), lead (Pb) as well as, cadmium (Cd),cooperrn(Cu), and zinc (Zn) removal from arsenic lead miningrnwastes (MW) contaminated site using phosphate and /orrnoxalate acid EDTA solutions . Soils used in this studyrnwere Sultan silt loam soil (Aquandic Xerochrept). Thernresults indicate that phosphate and /or oxalate acid EDTArnsolutions were very significant in extracting As fromrnMW polluted soils. The percentage of As extracted rangedrnfrom 3.8 to 38.8% from the total amount in soil. Thernoxalate acid and EDTA extraction solution extract lessrnAs than phosphate solutions in generals. In overall, thernpercentages of As and Pb extracted increased withrnincreasing of KH_2PO_4 + EDTA and/or oxalate acid +rnEDTA. A higher amount of Pb was extracted with 10 mMrnof oxalate acid in EDTA solutions. Combination of EDTArnand oxalate acid extract the maximum amounts from bothrnAs and Pb. Compared to As and Pb, much smallerrnamounts from Cd, Cu and Zn were generally extracted,rnindicating that phosphate and oxalate are not efficient inrnextracting Cd, Cu and Zn from MW polluted soils.
机译：对使用磷酸盐和/或草酸铝酸盐从砷铅矿开采废物（MW）污染场地中去除砷，铅（Pb）以及镉（Cd），铜（Cu）和锌（Zn）进行了实验室批处理实验EDTA解决方案。在这项研究中使用的土壤是苏丹粉质壤土（Aquandic Xerochrept）。结果表明，磷酸盐和/或草酸EDTA溶液对从污染的土壤中提取砷具有非常重要的意义。砷的提取量占土壤总量的3.8％至38.8％。一般而言，地诺草酸和EDTA萃取液比磷酸酯溶液萃取出更少的As。总体而言，随着KH_2PO_4 + EDTA和/或草酸+ rnEDTA的增加，提取的As和Pb的百分比增加。用10 mMrnof草酸在EDTA溶液中萃取出更高含量的Pb。 EDTArn和草酸的组合从rnAs和Pb中提取最大量。与砷和铅相比，通常从镉，铜和锌中提取的痕量汞要少得多，这表明磷酸盐和草酸盐不能有效地从MW污染土壤中萃取镉，铜和锌。

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