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首页> 外文期刊>International Journal of Soil, Sediment and Water >Heavy Metal Characterization and Leachability of
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Heavy Metal Characterization and Leachability of

机译：重金属的表征与浸出率。

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摘要

Industrial wastewater, including both domestic and production waster, with high organic matter content, discharged into the To Lich and Kim Nguu Rivers has degraded the quality of sediments in the river system. The present study shows that sediments are heavily polluted with heavy metals (220 to 475 mg/kg for Cu, 260 to 665 mg/kg for Pb, 250 to 535 mg/kg for Zn, 2.5 to 40 mg/kg for Cd, 505 to 655 mg/kg for Cr, and 48 to 165 mg/kg for Ni). Total heavy metal concentration in the sediment was correlated with organic matter content for Cu, Pb and Ni while no correlation was found for Cd, Zn and Cr. The heavy metals were bound with sediment particles through phases such as exchangeable, carbonate, oxide, organic matter and residual. The percentage of each phase was different among metal types; the organic matter and the oxide were predominant for the group of Cu, Pb and Ni and the group of Zn and Cd, respectively, and each phase was almost equal for Cr. The EDTA caused high heavy metal leachability compared to water, acetic acid and nitric acid. Average potential leachability decreased in the order: Cd > Ni > Cr > Cu = Zn > Pb.
机译：高有机物含量的工业废水，包括生活用水和生产废水，都排放到了土库奇河和金恩河中，这降低了河流系统中沉积物的质量。本研究表明，沉积物被重金属污染严重（铜220至475 mg / kg，铅260至665 mg / kg，锌250至535 mg / kg，镉2.5至40 mg / kg Cr可达655 mg / kg，Ni可达48至165 mg / kg）。沉积物中总重金属浓度与铜，铅和镍中的有机质含量相关，而镉，锌和铬中无相关性。重金属通过可交换，碳酸盐，氧化物，有机物和残留物等相与沉积物颗粒结合。在每种金属中，每个相的百分比都不同。 Cu，Pb和Ni，Zn和Cd分别以有机物和氧化物为主，而Cr的各相几乎相等。与水，乙酸和硝酸相比，EDTA具有较高的重金属浸出性。平均潜在浸出性按以下顺序降低：Cd> Ni> Cr> Cu = Zn> Pb。

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