含铁废水中重金属离子的比浊法分析

Turbidimetric analysis of heavy metal ions from iron-containing wastewater

研究了铁离子废水中重金属离子（以铅离子含量为标准）的分光光度测定法.采用不同的稳定剂将沉淀稳定在体系中,实验结果表明：在波长为450 nm处,无水乙醇的稳定效果最好,Pb2＋与Fe2＋含量与吸光度都成良好的线性关系,测定的Pb2＋和Fe2＋的质量浓度范围分别为0.25~1.25 ug/mL和1~5 ug/mL.通过各曲线得出含铁废水中重金属离子的含量,其结果与火焰原子吸收光谱法测得的结果基本一致;还研究了稳定剂的影响,测定了Pb2＋回收率,验证了本实验方法的可靠性.

The heavy metal ions（Lead ion content as the standard）from iron-containing wastewater was determinated by spectrophotometry.The precipitations were stabilized in the system by different stabilizers.The result showed： at the wavelength of 450 nm,the stabilizing effect of absolute ethyl alcohol was the best and the content of Pb2＋ and Fe2＋ had a good linear relationship with absorbance.Mass concentration range of Pb2＋ and Fe2＋ were 0.25-1.25 μg/mL and 1-5 μg/mL.The heavy metal ions content from iron-containing wastewater was obtained through the curves,which was in conformity with the result by flame atom absorption spectrographic method.Effect of stabilizer was also studied,the recovery rate of Pb2＋ was determined,and the reliability of this experimental method was verified.