微量Cr^6＋的示波极谱测定研究

在硫磷混酸介质中，Ｃｒ＾６＋与二苯卡巴反应生成的紫红色配合物，在－０．２Ｖ处产生一灵敏极谱波，其２次导数的波高与Ｃｒ＾６＋浓度在０．００４－０．２５ｍｇ／Ｌ范围之间呈线性关系，检出下限为０．００２ｍｇ／Ｌ，此法应用于环境水样及含金标样中总铬的测定，结果与其他测定方法基本吻合。     

镉与邻菲啰啉配合物吸附波的研究与应用

对镉与邻菲啰啉配合物的极谱波性质进行了研究。试验表明,在pH3.3的HCl—NaAc缓冲溶液中,镉与邻菲啰啉生成的配合物在-0.65V处产生一灵敏的吸附波,其2次导数的波高与镉浓度在0.0006～0.1mg/L范围内呈线性关系,检出下限为0.0003mg/L。此法经用于环境水样中微量镉的测定,结果与其他测定方法基本吻合。     

镉与邻菲罗啉配合物吸附波的研究与应用

对镉与邻菲菲鸭啉配合物的极谱性质进行了研究。试验表明，在ＰＨ３．３的ＨＣｌ－ＮａＡｃ缓冲溶液中，镉与邻菲罗啉生成的配合物在－０．６５Ｖ处产生一灵敏的吸附波，其２次导数的波高与镉浓度与０．０００６－０．１ｍｇ／Ｌ范围内呈线性关系，检出下限为０．０００３ｍｇ／Ｌ。经用于环境水样中微量镉的测定，结果与其他测定方法基本吻俣。     

Heavy metal accumulation of urban domestic rubbish compost in turfgrass by EDTA chelating

Seven kinds of heavy metal accumulation of rubbish compost in turfgrass by EDTA chelating were investigated. With EDTA application, heavy metal accumulation by two species of turfgrass was increased significantly. The enrichment coefficients of Lolium perenne L（L） and Festuca arundinacea L（F） to Cr reached 9.4.5 and 6.15 respectively. In the range of EDTA dosages given, heavy metal accumulation in turfgrass increased with increasing EDTA level. There were significant differences in remediation of different metals by applying EDTA. L had high ability to accumulate Cr, Cd, Ni and Zn, showing better remediation to heavy metals of rubbish compost. In contrast, F showed high ability to accumulate Cr, Ni, Cu and Zn. Low EDTA level increased aboveground net primary production （ANP） of turfgrass, but EDTA would considerably inhibit it when EDTA was higher than 20 mmol/kg. The results demonstrated that the optimum dosage of EDTA for remediating heavy metals in rubbish compost by turfgrass was between 10 mmol/kg and 20 mmol/kg.