海洋地质与第四纪地质2012，Vol.32Issue(1)：19-25,7.DOI:10.3724/SP.J.1140.2012.01019
长江干流悬浮物中元素相态组成与环境指示
ELEMENTAL COMPOSITION OF SUSPENDED SEDIMENTS FROM THE CHANGJIANG RIVER AND ITS ENVIRONMENTAL IMPLICATION
摘要
Abstract
The study on the concentrations of major elements in the suspended sediments collected from the Changjiang mainstream at Chongqing and the downstream areas reveals that element concentrations are different in the acid leached and residual fractions. The percentages of Ca and Mg are high in the leached fraction, while Al, Fe, K and Na are mainly concentrated in the residual fraction. The compositions of major elements show somewhat regional pattern of variations, primarily reflecting the controls of sources of the weathered materials, weathering intensity and hydrodynamics of the river. The distribution of heavy metals suggests that Pb, Zn, Co and Cu accumulate in the suspended sediments, probably due to the contamination of the river by intense human activities around the Three Gorges Reservoir and its downstream areas. The instability of hydrodynamic environment in the Three Gorges Reservoir leads to the compositional variation of heavy metals in vertical profiles.关键词
元素/悬浮沉积物/化学相态/人类活动/长江Key words
suspended sediment/ Three Gorges Reservoir/ phase of elements/ human activity/ Changjiang River分类
天文与地球科学引用本文复制引用
曾辰,杨守业,王磊,王皓,刘晓理..长江干流悬浮物中元素相态组成与环境指示[J].海洋地质与第四纪地质,2012,32(1):19-25,7.基金项目
高等学校博士学科点专项科研基金(200802470011) （200802470011）
国家自然科学学基金项目(41076018) （41076018）
长江水环境教育部重点实验室课题(YRWEY 1009) （YRWEY 1009）
