52 coal ash samples from individual households were analyzed to determine the pH and the concentrations of four toxic elements: arsenic, cadmium, lead and thallium. The method used was atomic absorption spectrometry with graphite-furnace atomization. The ash samples originated from various coal grades and statistical analysis showed existing correlations between the concentrations of studied elements, pH and the coal grades. The maximum concentrations of arsenic, cadmium, lead and thallium were 50,900, 43,500, 128,900, and 6660 µg/kg, respectively. The results were compared with the published data for the ash of industrial origin.

中文翻译：

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来自单个家用熔炉的煤灰中的砷，镉，铅和th

分析了来自每个家庭的52个煤灰样品，以确定pH值和四种有毒元素的浓度：砷，镉，铅和and。所使用的方法是采用石墨炉雾化的原子吸收光谱法。来自不同煤种的灰分样品和统计分析表明，所研究元素的浓度，pH和煤种之间存在相关性。砷，镉，铅和th的最大浓度分别为50,900、43,500、128,900和6660 µg / kg。将结果与工业灰分的公开数据进行了比较。