本文主要研究内容
作者罗旭文（2019）在《粤北某钢铁工业区下游流域沉积物》一文中研究指出：铊(Tl)是一种分散稀有元素,其毒性高于Cd和Hg,在大陆地壳和海洋地壳中的平均含量仅为0.49μg/g和0.013μg/g。Tl同时具有亲石性和亲硫性,因此可以富集在硫铁矿和云母等不同类型的矿物中。随着人类对矿产资源的开发和利用,世界各地都发现了不同程度的Tl污染,但已有的Tl污染研究主要集中于矿石的开采和冶炼地区,而对钢铁冶炼企业造成的Tl污染研究极少,本课题组前期研究表明钢铁冶炼的排放是环境中Tl污染的一个重要的潜在来源。我国是世界上最大的产钢国,由于长期缺乏对钢铁冶炼企业Tl排放的监管,可能已有大量的Tl随冶炼废水进入环境中,对周边地区的居民产生了极大的威胁。因此,对钢铁冶炼工业区周边地区Tl等重金属污染的研究有助于了解钢铁冶炼排放中Tl等重金属在环境中的迁移转化规律,同时为钢铁冶炼企业Tl污染的预防和治理提供重要的理论依据。韶关位于北江上游,市内有多家大型冶炼厂和钢铁厂,冶炼的排放导致北江流域内Tl等重金属的污染。本文选取了韶关市内某钢铁冶炼区,采集其下游流域三个柱状沉积物以及冶炼原料和冶炼废渣废水,通过测定样品中Tl等重金属元素含量及Pb同位素组成,结合多种污染评价方法,对沉积物中Tl等重金属的空间分布特征、污染风险水平和污染来源进行了研究,结果表明:(1)三个沉积物中Tl等重金属含量超过地壳背景值,表现出不同程度的污染,上游河流A沉积物中的重金属来源复杂多样,且重金属含量高于下游沉积物;(2)重金属污染风险评价的结果表明,三个沉积物中Tl等重金属表现出中度以上的富集和污染等级,污染等级大小为Sb>Cd>Pb>Zn>Cu>Tl。潜在生态风险指数的评价结果指出Tl等重金属对环境有不同程度的潜在生态风险,可能会被重新释放造成二次污染,是该流域内一个巨大的环境隐患;(3)相关性分析和主成分分析结果表明,沉积物中Tl等重金属都受到了人为来源的影响;(4)Pb同位素定量源解析计算结果表明沉积物中的重金属有77.6–80.9%来源于人为活动的影响。钢铁冶炼活动对三个沉积物重金属污染的贡献率分别为53.0%、35.7%和66.3%。虽然本研究中的钢铁工业区下游流域沉积物的Tl污染程度低于附近地区的某Pb-Zn冶炼厂,但是该钢铁工业区同样是北江流域内一个重要的Tl污染排放源,需要加强对钢铁冶炼排放Tl污染的监测和治理。
Abstract
ta (Tl)shi yi chong fen san xi you yuan su ,ji du xing gao yu Cdhe Hg,zai da liu de ke he hai xiang de ke zhong de ping jun han liang jin wei 0.49μg/ghe 0.013μg/g。Tltong shi ju you qin dan xing he qin liu xing ,yin ci ke yi fu ji zai liu tie kuang he yun mu deng bu tong lei xing de kuang wu zhong 。sui zhao ren lei dui kuang chan zi yuan de kai fa he li yong ,shi jie ge de dou fa xian le bu tong cheng du de Tlwu ran ,dan yi you de Tlwu ran yan jiu zhu yao ji zhong yu kuang dan de kai cai he ye lian de ou ,er dui gang tie ye lian qi ye zao cheng de Tlwu ran yan jiu ji shao ,ben ke ti zu qian ji yan jiu biao ming gang tie ye lian de pai fang shi huan jing zhong Tlwu ran de yi ge chong yao de qian zai lai yuan 。wo guo shi shi jie shang zui da de chan gang guo ,you yu chang ji que fa dui gang tie ye lian qi ye Tlpai fang de jian guan ,ke neng yi you da liang de Tlsui ye lian fei shui jin ru huan jing zhong ,dui zhou bian de ou de ju min chan sheng le ji da de wei xie 。yin ci ,dui gang tie ye lian gong ye ou zhou bian de ou Tldeng chong jin shu wu ran de yan jiu you zhu yu le jie gang tie ye lian pai fang zhong Tldeng chong jin shu zai huan jing zhong de qian yi zhuai hua gui lv ,tong shi wei gang tie ye lian qi ye Tlwu ran de yu fang he zhi li di gong chong yao de li lun yi ju 。shao guan wei yu bei jiang shang you ,shi nei you duo jia da xing ye lian an he gang tie an ,ye lian de pai fang dao zhi bei jiang liu yu nei Tldeng chong jin shu de wu ran 。ben wen shua qu le shao guan shi nei mou gang tie ye lian ou ,cai ji ji xia you liu yu san ge zhu zhuang chen ji wu yi ji ye lian yuan liao he ye lian fei zha fei shui ,tong guo ce ding yang pin zhong Tldeng chong jin shu yuan su han liang ji Pbtong wei su zu cheng ,jie ge duo chong wu ran ping jia fang fa ,dui chen ji wu zhong Tldeng chong jin shu de kong jian fen bu te zheng 、wu ran feng xian shui ping he wu ran lai yuan jin hang le yan jiu ,jie guo biao ming :(1)san ge chen ji wu zhong Tldeng chong jin shu han liang chao guo de ke bei jing zhi ,biao xian chu bu tong cheng du de wu ran ,shang you he liu Achen ji wu zhong de chong jin shu lai yuan fu za duo yang ,ju chong jin shu han liang gao yu xia you chen ji wu ;(2)chong jin shu wu ran feng xian ping jia de jie guo biao ming ,san ge chen ji wu zhong Tldeng chong jin shu biao xian chu zhong du yi shang de fu ji he wu ran deng ji ,wu ran deng ji da xiao wei Sb>Cd>Pb>Zn>Cu>Tl。qian zai sheng tai feng xian zhi shu de ping jia jie guo zhi chu Tldeng chong jin shu dui huan jing you bu tong cheng du de qian zai sheng tai feng xian ,ke neng hui bei chong xin shi fang zao cheng er ci wu ran ,shi gai liu yu nei yi ge ju da de huan jing yin huan ;(3)xiang guan xing fen xi he zhu cheng fen fen xi jie guo biao ming ,chen ji wu zhong Tldeng chong jin shu dou shou dao le ren wei lai yuan de ying xiang ;(4)Pbtong wei su ding liang yuan jie xi ji suan jie guo biao ming chen ji wu zhong de chong jin shu you 77.6–80.9%lai yuan yu ren wei huo dong de ying xiang 。gang tie ye lian huo dong dui san ge chen ji wu chong jin shu wu ran de gong suo lv fen bie wei 53.0%、35.7%he 66.3%。sui ran ben yan jiu zhong de gang tie gong ye ou xia you liu yu chen ji wu de Tlwu ran cheng du di yu fu jin de ou de mou Pb-Znye lian an ,dan shi gai gang tie gong ye ou tong yang shi bei jiang liu yu nei yi ge chong yao de Tlwu ran pai fang yuan ,xu yao jia jiang dui gang tie ye lian pai fang Tlwu ran de jian ce he zhi li 。
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论文详细介绍
论文作者分别是来自广州大学的罗旭文，发表于刊物广州大学2019-10-11论文，是一篇关于钢铁工业区论文,空间分布特征论文,污染风险评价论文,同位素示踪论文,广州大学2019-10-11论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自广州大学2019-10-11论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
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