固定配比的钠化膨润土与土壤在不同pH条件下对重金属离子的吸附效果研究.pdfVIP

2010 8 Vol. 29, No. 4 August 2010 ROCK AND M INERAL ANALYSIS 4 11~ 413 : 2010) 固定配比的钠化膨润土与土壤在不同 pH条件下对 重金属离子的吸附效果研究 * 谭科艳, 刘晓端 , 黄园英, 陈燕芳 (, 100037) : 研究了固定配比的钠化膨润土与土壤在不同pH 条 下对重金属离子的吸附效果钠化膨润土与 污染土壤按质量比 110和 1 20的比例混合, 用碳酸氢铵- 二乙三胺五乙酸( AB- DTPA) 法提取土壤中 有效态重金属结果表明, 在钠化膨润土与土壤质量比为 1 20的条 下, 取得了最佳的修复效果; 在 pH = 9. 14时该混合土壤对重金属的总体吸附效果最佳在实际土壤修复中, 针对不同重金属污染, 应灵活 调整修复材料与污染土壤的配比和土壤的 pH 条 : 重金属; 钠化膨润土; 修复; 配比; pH 条 ; 土壤 : X825 : B Study onAdsorption Effects ofHeavyMetal Ions by Reformed Soils with FixedRatios of SodiummodifiedBentonite to Soil atDifferent pH onditions * TAN K eyan, LI U X iaoduan , H UAN G Yuany ing, CHEN Yanf ang ( Na tiona l Research C enter fo r Geoana lys is, Be ijing 100037, Ch ina) Abstract: The adsorption effects of heavy metals by reformed soils w ith fixed ratios of 1 10 and 1 20 of sod iummod ified bentonite ( SB) to local soil ( LS) at different pH cond itionsw ere studied. H eavy metals in the soilsw ere extracted using ABDTPA m ethod. The resu lts show ed that the adsorption effect for heavy m etals by reformed soilw ith ratio of 1 20 ( SB /LS) w as better than the reformed soil w ith 1 10 ( SB /LS). And the reformed soilw ith ratio of 1 20 ( SB /LS) and at pH = 9. 14 exh ib ited the best adsorption effect for heavy metals. The resu lts also show ed that in the actual soil remed iation, the ratios of remediation materials to local soils and soil pH cond itions should be flexible and adjustable for different heavy metal polluted soils. Key words: heavym etal; sod iummodified benton ite; soil remed iation; material ratio; pH condition; soil , , , , , , : :