本文關(guān)鍵詞：受酸性礦山廢水影響河流懸浮物中重金屬污染特征分析與生態(tài)風(fēng)險評價　出處：《環(huán)境化學(xué)》2016年11期 　論文類型：期刊論文

  更多相關(guān)文章： 懸浮物 重金屬 酸性礦山廢水 濃度分布 礦物特征 潛在生態(tài)風(fēng)險

【摘要】：受酸性礦山廢水影響河流水體與沉積物中重金屬污染及評價的研究已有大量報道,而缺乏對這類水體懸浮物重金屬污染研究.選擇受廣東大寶山采礦廢水影響的橫石河為研究對象,研究該河流懸浮物中6種重金屬元素(Mn、Cu、Zn、As、Cd和Pb)的濃度空間分布,采用地累積指數(shù)法和潛在生態(tài)危害指數(shù)法評價重金屬生態(tài)風(fēng)險,結(jié)合懸浮物組分SEM/XRD表征來進一步解析污染特征及遷移轉(zhuǎn)化機理.結(jié)果表明,橫石河懸浮物重金屬污染嚴(yán)重,主要來源于大寶山采礦廢水,Mn、Cu、Zn、As、Cd、Pb起始濃度分別高達(dá)1470、101.6、12169、174.9、412.2、873.7 mg·kg~(-1),且重金屬濃度沿程呈逐漸降低趨勢,與懸浮物含量呈顯著正相關(guān);懸浮物中重金屬污染處于極強風(fēng)險等級,單個元素Cd嚴(yán)重污染頻率為83.33%,對RI貢獻平均超90%,各元素潛在風(fēng)險大小為:CdZnAsPbCuMn;橫石河懸浮物初始礦物成分以施氏礦物為主,隨著河流的遷移,其逐漸向更為穩(wěn)定的針鐵礦和水鐵礦轉(zhuǎn)化,這種礦物組成及轉(zhuǎn)化決定了重金屬的分布特征.
[Abstract]:The study of heavy metal pollution and evaluation in river water and sediment affected by acid mine wastewater has been reported. However, the research on heavy metal pollution of suspended matter in this kind of water is lacking. The Hengshi River, which is affected by mining wastewater in Dabaoshan, Guangdong Province, is selected as the research object to study six heavy metal elements in the suspended matter of this river. The spatial distribution of the concentration of CD and Pb) was evaluated by the method of ground accumulation index and potential ecological hazard index. The pollution characteristics and migration and transformation mechanism were further analyzed by means of SEM/XRD characterization of suspended solids. The results showed that the heavy metal pollution of suspended solids in Hengshi River was serious and mainly originated from mn in Dabaoshan mining wastewater. The initial concentration of Pb in Aspergillus aspergillata was as high as 1470 ~ 101.6U ~ 12164.9 ~ 174.9N ~ (412.2N) ~ 873.7 mg 路kg ~ (-1) ~ (-1). The concentration of heavy metals decreased gradually along the course, and there was a significant positive correlation with the content of suspended solids. Heavy metal pollution in suspended solids is in a very strong risk level. The frequency of CD serious pollution of single element is 83.33, and the contribution to RI is more than 90% on average. The potential risk of each element is: 1. CdZnAsPbCuMn. The initial mineral composition of the suspended matter in the Hengshihe River is dominated by Schwann minerals. With the migration of the river, it gradually transforms to the more stable goethite and hydropyrite, which determines the distribution characteristics of heavy metals.
【作者單位】： 北京理工大學(xué)珠海學(xué)院材料與環(huán)境學(xué)院;北京師范大學(xué)珠海分校工程技術(shù)學(xué)院;
【基金】：廣東省創(chuàng)新強校工程基金(831783) 十二五科技支撐計劃項目(2015BAK11B03) 北京理工大學(xué)珠海學(xué)院質(zhì)量工程建設(shè)項目(2016003ZL)資助~~
【分類號】：X751;X522;X826
【正文快照】： Supported by Fund for InnovationStrong School Engineering of Guangdong Province(831783),Technology ResearchDevelopmentProgram During the 12th Five-Year Plan Period(2015BAK11B03)and the Quality Engineering Project of ZHBIT(2016003ZL).**通訊聯(lián)系人,Tel:13

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