中国地质2012，Vol.39Issue(2)：283-294,12.
中国东部主要入海河流河口区地球化学特征:理化指标与水溶态元素浓度
Hydrogeochemicai characteristics of major estuaries in eastern China:physicochemical indicators and soluble element concentrations of river water
摘要
Abstract
Hydro-physicochemical properties and element concentrations of rivers constitute key indicators related to water functions. Chemical flux through river to sea has important impact on marine ecosystem. This paper presents pH values, electric conductivities and soluble concentrations of major and trace elements in river water sampled at the lower position or estuaries of 33 rivers. It is demonstrated that pH values, electric conductivities and soluble concentrations of major and trace elements in most rivers of northern China are much higher than those in rivers of southern China, which is consistent with climate change from north to south. The soluble concentrations of major elements in river water are associated with the zoning of soil type and soil chemical distribution pattern from north to south. However, anomalous content of major elements and physicochemical indexes in some rivers may be influenced by the mixture of sea water with fresh water. It is found that trace element concentrations in some rivers are anomalous in comparison with the concentrations in other rivers of the same region. Such a phenomenon may be attributed to (1) special geological and geochemical background of drainage areas; and (2) anthropogenic activity and pollution. It is inferred that the lower concentrations of soluble Na, Ca, K, Zn, Se in flood season are caused by dilution under higher precipitation, whereas the higher concentration of Al, REE, Fe and some other elements may be the consequence of containing lots of micro-particulates and colloids derived from soil through surface current.关键词
入海河流/理化指标/常量和微量元素/水溶态浓度/气候分带/流域地球化学背景/人为污染Key words
river flowing into sea/hydro-physicochemical indicator/major and trace elements/soluble concentration/climate zone/ geochemical background of drainage area/anthropogenic pollution分类
天文与地球科学引用本文复制引用
周国华,孙彬彬,曾道明,魏华玲,刘占元,张必敏..中国东部主要入海河流河口区地球化学特征:理化指标与水溶态元素浓度[J].中国地质,2012,39(2):283-294,12.基金项目
国家专项“全国土壤现状调查及污染防治”下属工作项目“沿海经济带区域生态地球化学评价”项目(GZTR20060206)资助. （GZTR20060206）
