CAJ | 학술논문

调查了广西刁江河水中As,Zn和Pb的溶解态、悬浮颗粒态分布情况及季节变化,以及3种重金属在不同粒级沉积物中的分布情况. 结果表明:刁江流域河水与沉积物中3种重金属污染在流域尺度上的分布存在差异,沉积物污染更为严重. 与土壤污染一致,沉积物中3种重金属的污染范围扩散延伸到距离污染源近200 km的下游区域,其中车河矿区对As污染的贡献率明显高于大厂矿区,而对Pb污染的贡献率明显小于大厂矿区;不同重金属在水体中的赋存形态存在差异,河水中悬浮颗粒态Pb所占比例远高于As和Zn,这与3种重金属矿物的稳定性以及在不同粒级沉积物中的富集特征有关;河水中重金属的赋存形态存在季节差别,丰水期悬浮颗粒态重金属所占比例明显高于枯水期.
조사료엄서조강하수중As,Zn화Pb적용해태、현부과립태분포정황급계절변화,이급3충중금속재불동립급침적물중적분포정황. 결과표명:조강류역하수여침적물중3충중금속오염재류역척도상적분포존재차이,침적물오염경위엄중. 여토양오염일치,침적물중3충중금속적오염범위확산연신도거리오염원근200 km적하유구역,기중차하광구대As오염적공헌솔명현고우대엄광구,이대Pb오염적공헌솔명현소우대엄광구;불동중금속재수체중적부존형태존재차이,하수중현부과립태Pb소점비례원고우As화Zn,저여3충중금속광물적은정성이급재불동립급침적물중적부집특정유관;하수중중금속적부존형태존재계절차별,봉수기현부과립태중금속소점비례명현고우고수기.
Spatial and seasonal distributions of arsenic (As), zinc (Zn) and lead (Pb) in dissolved and particulate fractions in river flows and the distribution of three heavy metals in different size fractions of sediments were investigated in Diaojiang River in Guangxi province. It was shown that the distribution of the three heavy metals contamination in the water was different from that in sediments in watershed scale. The contamination in the sediments was more serious. Sediments 200 km downstream from mining areas were also seriously polluted, as well as soils along the bank. The Chehe mining area contributed more As and less Pb than the Dachang mining area for the Diaojiang river basin pollution. The occurrence form of heavy metals in the river flow varied among elements. Pb in particulate form contributed greater for its pollution in river flow than dissolved Pb, while this trend was reversed for As and Zn. This was related to the different stabilities of the three heavy metal minerals and their varied accumulation characteristics in different size fractions of sediments. Seasonal variation showed that the proportions of particulate heavy metals in river flow were significantly higher in the wet season than that in the dry season.