长江水环境的地球化学初步研究

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	长江水环境的地球化学初步研究
	王宏卫
	1994
学位授予单位	中国科学院地球化学研究所
学位授予地点	中国科学院地球化学研究所
学位名称	博士
学位专业	环境地化(environmental geochemistry)
关键词	长江悬浮物沉积物水溶态#delta#~(34)So~(2-)_4 悬浮态#delta#~(34)s 矿物组成
摘要	1）长江沿程水溶态#delta#~(34)SO~(2-)_4的变化范围为-3.474～+5.938 per thousand，算术平均值为2.254 per thousand；悬浮态#delta#~(34)S之间的变化范围为-4.031 approx +4.580 per thousand。长江中水溶态#delta#~(34)SO~(2-)_4与悬浮态#delta#~(34)S之间存在相关性；2）根据长江中水溶态#delta#~(34)SO~(2-)_4的平均和它的径流量，估算中国河流#delta#~(34)SO~(2-)_4的加权平均值为+2.7 per thousand。结合中国长江、黄河的硫同位素组成和亚洲其它主要河流水溶态SO~(2-)_4的含量，推测亚洲河流的#delta#~(34)SO~(2-)_4加权平均值可能为+5 per thousand；3）长江流域内的区域地质条件决定了河流悬浮物中稀土元素和微量元素的背景含量－－悬浮物中稀土元素和大多数微量元素的含量为东高西低；4）悬浮物中大多数元素的含量随时间的变化基本保护不变，其变化幅度在自然波动范围之内；而砷元素在悬浮物中的含量随时间有明显的增高趋势，这显示了长江流域内的As污染源的增加。
其他摘要	1) The #delta#~(34)SO~(2-)_4 values for dissolved sulphate along main channel of the Yangtze River range from -3.474 per thousand to 5.938 per thousand, its mean value is 2.254 per thousand. The #delta#~(34)S values for sulphur in suspended particulate range from -4.031 per thousand to 4.458 per thousand, its mean values is 1.415. There is a correlation equation between #delta#~(34)SO~(2-)_4 and #delta#~(34)S. combining #delta#~(34)SO~(2-)_4 of the Yangtze River and Yellow River with discharge of chinese major rivers, it is estimated weighted mean value for chinese rivers is 2.7 per thousand, and combining #delta#~(34)SO~(2-)_4 of the Yangtze River and Yellow River with SO~(2-)_4 concentration of other Asian major rivers, the weighted mean values for the Asian rivers is 5 per thousand; 3) The regional geology of the Yangtze River basin determines background concentration of REE and Trace Element in suspended particulate-REE and trace element concentration in suspended particulate in the east of china are higher than those in the west; 4) Concentration of most element in suspended particulate keeps constant with time. However, As concentration in them show apparent increase, this exibits increase of As pollution sources in the Yangtze River basin.
页数	65
语种	中文
文献类型	学位论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/3958
专题	研究生_研究生_学位论文
推荐引用方式 GB/T 7714	王宏卫. 长江水环境的地球化学初步研究[D]. 中国科学院地球化学研究所. 中国科学院地球化学研究所,1994.