广州地区酸雨硫源的硫同位素示踪研究  

STUDY ON SULFUR SOURCE OF ACID RAIN USING SULFUR ISOTOPIC TRACE

作　　者：张鸿斌[1] 陈毓蔚[1] 刘德平[1] 

机构地区：[1]中国科学院广州地球化学研究所

出　　处：《地球化学》1995年第C00期126-133,共8页Geochimica

基　　金：广东省重点科技攻关课题;省科委基金;国家自然基金

摘　　要：为研究酸雨硫源，本文对广州地区大气降水、大气ＳＯ２和气溶酸、工业用煤和重油及其燃烧产物样品进行了硫同位素组成测定。对煤和重油在燃烧过程中的硫同位素分馏效应进行了试验研究，发现重油在燃烧过程中有明显的类似于煤的硫同位素分馏效应，其燃烧产物ＳＯ２气体富集轻硫同位素，而固体颗粒物则富集重硫同位素。依据同位素质量平衡，定量计算了四种硫源（人为成因硫、天然生物硫、海雾硫和远距离传输硫），对广州地区酸雨的贡献。上述结果，对研究全球环境地球化学有重要意义，其硫同位素组成为识别和跟踪污染硫源的循环提供了＂内标＂In order to study sulfur source of acid rain, the sulfur isotopic composition of precipitated water, atmospheric SO_2, aerosol, industrial coal and heavy oil, including their burning products in Guangzhou area, were measured. The fractionation effect of sulfur isotopic during burning process of coal and heavy oil were also studied. The results indicate that the fractionation effect of sulfur isotope of heavy oil is similar to that of coal: the SO_2, as a gaseous product of burning of heavy oil, is enriched in ￣(32)S, whereas the particle, as a solid product, is enriched in ￣(34)S.With the principle of mass balance, the 4 sulfur sources, i.e. anthropogenic, biogenic, sea spray and transport sulfur, and their contributions to the acid rain in Guangzhou area have been calculated quantitatively. The results is of environmental geochemical significance.The sulfur isotopic compositions of contamination souce provide an“internal standard”for tracing their global circulation.

关 键 词：广州地区 酸雨 硫源 硫同位素分馏效应 取样原则 取样方法 硫同位素组成 

分 类 号：P426.612[天文地球—大气科学及气象学] X830.2[环境科学与工程—环境工程]