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在环境工程反应动力学研究中,设计不同的反应器添加含硫酸还原菌的淤泥,使加入其中标准SO_4~(2-)还原为S~(2-)。它的意义在于将废弃物中的铜、铁、锌、镉等金属硫酸盐变成硫化物以减小毒性。为此要随时测定反应器中的SO_4~(2-)离子。离子色谱法对溶液样品中阴离子的测定已有报道。本文用,Dionex—2120i型离子色谱仪,电导检测器HPIC—AS_4分离柱测定了从反应器取出样品中的SO_4~(2-)离子,相对偏差小于3％,检测下限40ppb。样品中同时存在的F~-,Cl~-,NO_2~-,PO_4~(3-),Br~-和NO_3~-离子可分离定量。
In the study of reaction kinetics of environmental engineering, different reactors were designed to add sludge containing sulfate reducing bacteria to reduce the standard SO 4 4- (2-) into S 2 2-. Its significance lies in the waste of copper, iron, zinc, cadmium and other metal sulphate into sulfide to reduce toxicity. For this purpose, the SO 4 2- ions in the reactor should be measured at any time. Determination of anions in solution samples by ion chromatography has been reported. In this paper, the Dionex-2120i ion chromatograph and the conductivity detector HPIC-AS_4 were used to determine the SO_4 ~ (2-) ions in the sample taken from the reactor. The relative deviation was less than 3% and the detection limit was 40ppb. In the sample, F ~ -, Cl ~ -, NO_2 ~ -, PO_4 ~ (3 -), Br ~ - and NO_3 ~ - ions can be separated and quantified simultaneously.