School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Ecotoxicol Environ Saf. 2013 Sep;95:130-6. doi: 10.1016/j.ecoenv.2013.05.026. Epub 2013 Jun 16.
The environmental risk of exposure to six heavy metals (Cu, Pb, Zn, Cr, Ni, and Cd) found in fly ashes from waste filter bags obtained from a steel plant was estimated based on the mineralogical compositions, total concentrations and speciation of the metals in the fly ashes. The results indicated that the fly ashes mainly consisted of hematite, magnetite, cyanite, spinel, coesite and amorphous materials. The concentrations of Zn and Pb were much higher than that of other materials. After Zn and Pb, Ni was present in the highest concentration, followed by Cu, Cr and Cd. Each heavy metal was distributed differently in fly ashes. The levels of Zn, Cd and Pb in the active fraction were very high, and ranged from 64.83 to 81.96%, 34.48 to 82.4% and 6.92 to 79.65% respectively, while Cu, Cr and Ni were mainly present in the residual fraction. The risk assessment code (RAC) values of fly ashes showed that the Zn and Cd present in the H3 sample presented a very high risk, with RAC values greater than 50%. The Cu present in the H3 sample, Cd in the H2 sample and Zn in the H4 and H5 samples presented a high risk. The Pb present in the H2 sample, Cd in the H4 sample, Ni in the H1 and H5 samples, and Zn in the H1 sample presented a medium risk. A low risk was presented by the Cu present in the H1, H2, H4 and H5 samples, the Pb in the H1, H3 and H5 samples, the Cd in the H1 and H5 samples, and the Ni in the H2 sample. No risk was presented by Cr in any sample.
基于从一家钢铁厂获得的废滤袋飞灰中的矿物成分、重金属的总浓度和形态，评估了飞灰中存在的六种重金属（Cu、Pb、Zn、Cr、Ni 和 Cd）的环境暴露风险。结果表明，飞灰主要由赤铁矿、磁铁矿、蓝晶石、尖晶石、柯石英和无定形物质组成。Zn 和 Pb 的浓度明显高于其他物质。除了 Zn 和 Pb 之外，Ni 的浓度最高，其次是 Cu、Cr 和 Cd。每种重金属在飞灰中的分布都不同。活性部分中 Zn、Cd 和 Pb 的含量非常高，分别为 64.83%至 81.96%、34.48%至 82.4%和 6.92%至 79.65%，而 Cu、Cr 和 Ni 主要存在于残余部分。飞灰的风险评估代码（RAC）值表明，H3 样品中的 Zn 和 Cd 风险极高，RAC 值大于 50%。H3 样品中的 Cu、H2 样品中的 Cd、H4 和 H5 样品中的 Zn 呈现高风险。H2 样品中的 Pb、H4 样品中的 Cd、H1 和 H5 样品中的 Ni 以及 H1 样品中的 Zn 呈现中风险。H1、H2、H4 和 H5 样品中的 Cu、H1、H3 和 H5 样品中的 Pb、H1 和 H5 样品中的 Cd 以及 H2 样品中的 Ni 呈现低风险。任何样品中的 Cr 都没有风险。
