School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Ecotoxicol Environ Saf. 2013 Dec;98:128-34. doi: 10.1016/j.ecoenv.2013.09.012. Epub 2013 Oct 1.
The safe disposal of sludge from textile dyeing industry requires research on bioavailability and concentration of heavy metals. In this study, concentrations and chemical speciation of heavy metals (Cd, Cr, Cu, Ni, Zn, Pb) in sludge from nine different textile dyeing plants were examined. Some physiochemical features of sludge from textile dyeing industry were determined, and a sequential extraction procedure recommended by the Community Bureau of Reference (BCR) was used to study the metal speciation. Cluster analysis (CA) and principal component analysis (PCA) were applied to provide additional information regarding differences in sludge composition. The results showed that Zn and Cu contents were the highest, followed by Ni, Cr, Cd and Pb. The concentration of Cd and Ni in some sludge samples exceeded the standard suggested for acidic soils in China (GB18918-2002). In sludge from textile dyeing plants, Pb, Cd and Cr were principally distributed in the oxidizable and residual fraction, Cu in the oxidizable fraction, Ni in all four fractions and Zn in the acid soluble/exchangeable and reducible fractions. The pH and heat-drying method affected the fractionation of heavy metals in sludge.
纺织印染行业污泥的安全处置需要研究重金属的生物有效性和浓度。本研究对来自 9 家不同纺织印染厂的污泥中重金属（Cd、Cr、Cu、Ni、Zn、Pb）的浓度和化学形态进行了研究。测定了纺织印染污泥的一些理化特性，并采用欧洲共同体标准局（BCR）推荐的连续提取程序研究金属形态。采用聚类分析（CA）和主成分分析（PCA）提供有关污泥组成差异的附加信息。结果表明，Zn 和 Cu 的含量最高，其次是 Ni、Cr、Cd 和 Pb。一些污泥样品中的 Cd 和 Ni 浓度超过了中国酸性土壤的标准（GB18918-2002）。在纺织印染厂的污泥中，Pb、Cd 和 Cr 主要分布在可氧化和残留部分，Cu 分布在可氧化部分，Ni 分布在所有四个部分，Zn 分布在酸溶/可交换和可还原部分。pH 值和热干燥法影响污泥中重金属的分馏。
