发展了分析方法，以准确测定最常见的 混凝过程中使用的各种明矾原料中的微量金属污染物 饮用水处理。螯合-离子色谱法的组合 萃取原子吸收光谱法和氢化物发生原子荧光法 允许从明矾基质中选择性分离微量金属，具有高度的稳定性 精密度和灵敏度。微量砷镉铬铜锰， 镍、铅和锌的含量范围为20-330 ug/g铝（Al）；铁，认出了吗 作为原材料中的一种共污染物，其含量为20 mg/g Al。通过推断这些 饮用水处理中明矾的实际应用剂量的测量水平， 作者可以预测污染物的浓度（在最坏的情况下） 成品水和明矾污泥。对于成品水，即使假设没有 在凝固过程中，微量金属被去除，污染物的浓度则没有 不超过饮用水标准，他们的贡献仅达到 允许的最大污染物水平。在这种情况下，微量金属 假设在凝固过程中被去除，则会在 明矾污泥的重要性不足以严重影响使用明矾的决定 污泥用于农业用途。 包括24个参考文献、表格和图表。

Analytical methods were developed to accurately determine the levels of the most prevalent trace metal contaminants in a variety of alum feedstocks used in the coagulation process of drinking water treatment. A combination of chelation ion chromatography, chelation extraction-atomic absorption spectrometry, and hydride generation atomic fluorescence allowed for the selective isolation of trace metals from the alum matrix with a high degree of precision and sensitivity. Trace levels of arsenic, cadmium, chromium, copper, manganese, nickel, lead, and zinc were found in the range of 20-330 ug/g aluminum (Al); iron, recognized as a co-contaminant in the raw material, was present at 20 mg/g Al. By extrapolating these measured levels to an upper yet realistic applied dosage of alum in drinking water treatment, the authors could predict the contaminants' concentrations (under a worst-case scenario) in both the finished water and alum sludge. For finished water even if it was assumed that none of the trace metals was removed during coagulation, the contaminants' concentrations did not exceed drinking water standards, and their contribution reached only a small fraction of the permitted maximum contaminant level. In a scenario in which the trace metals were assumed to be removed during the coagulation process, levels that would accumulate in the alum sludge would not be significant enough to heavily influence decisions to apply alum sludge to land for agricultural uses. Includes 24 references, tables, figures.