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水中微量铅、锌、镉、铜、镍的测定,一般采用萃取法、加热浓缩法等。本文是利用活性炭在大体积水相中有吸附微量重金属的能力,富集河水中微量铅、锌、镉、铜、镍。探讨了吸附时pH条件、活性炭用量、洗脱条件及共存离子的影响,研究结果表明:镉、铅的富集浓度为0.002mg/L;锌、铜、镍的富集浓度为0.005mg/L。
Determination of trace amounts of lead, zinc, cadmium, copper and nickel in water, generally using extraction method, heat concentration method. This paper is the use of activated carbon in a large volume of aqueous phase adsorption capacity of trace heavy metals, enrich trace lead, zinc, cadmium, copper and nickel in river water. The effects of pH, amount of activated carbon, elution conditions and coexisting ions on adsorption were investigated. The results showed that the concentration of cadmium and lead was 0.002mg / L and the concentration of zinc, copper and nickel was 0.005mg / L .