CAJ | 학술논문

2011年对珠江口伶仃洋31个点位表层沉积物中主要的重金属 Cr、Ni、Cu、Pb、Zn、Cd 和 As 含量、分布特征及来源因素进行了研究。采用了 BCR 提取法分析各种重金属赋存形态，并依据各种重金属的形态特征进行了因子分析，了解其分布的控制因素。结果表明：伶仃洋沉积物重金属分布特征为从西北向东南逐渐减小，各元素在伶仃洋西线沿岸的浓度普遍高于东线沿岸区域，研究区西滩北段区域成为重金属高值区。伶仃洋 Cr、As、Ni 主要以残渣态存在，Pb 主要以可还原态存在，Cd 主要以酸提取态存在，而 Cu、Zn 在各形态中比较分散。各重金属非残渣态比重 Cd 为最高，As 为最低，各元素非残渣态在平面上的分布与总量分布模式基本一致，所以，伶仃洋海域通过总量来确定区域重金属污染情况在一定程度上是可靠的。因子分析结果表明，伶仃洋重金属主要为人为污染物的排放（包括工业废水、生活污水等），其次为流域自然风化产物的输入。
2011년대주강구령정양31개점위표층침적물중주요적중금속 Cr、Ni、Cu、Pb、Zn、Cd 화 As 함량、분포특정급래원인소진행료연구。채용료 BCR 제취법분석각충중금속부존형태，병의거각충중금속적형태특정진행료인자분석，료해기분포적공제인소。결과표명：령정양침적물중금속분포특정위종서북향동남축점감소，각원소재령정양서선연안적농도보편고우동선연안구역，연구구서탄북단구역성위중금속고치구。령정양 Cr、As、Ni 주요이잔사태존재，Pb 주요이가환원태존재，Cd 주요이산제취태존재，이 Cu、Zn 재각형태중비교분산。각중금속비잔사태비중 Cd 위최고，As 위최저，각원소비잔사태재평면상적분포여총량분포모식기본일치，소이，령정양해역통과총량래학정구역중금속오염정황재일정정도상시가고적。인자분석결과표명，령정양중금속주요위인위오염물적배방（포괄공업폐수、생활오수등），기차위류역자연풍화산물적수입。
Researches on the contents of heavy metals, such as Cr, Ni, Cu, Pb, Zn, Cd, As and their distribution characteristics and sources in the surface sediments of 31 sampling sites (sampled in 2011) in the Pearl River Estuary, are conducted. The distribution characteristics of the specific chemical forms and sources of these heavy metals are analyzed with the method of modified BCR and factorial analysis. Results show that the contents decrease gradually from the northwest to the southeast, with higher contents in the west coast area and west tidal-barrier. The results of modified BCR sequential extraction have showed that in the area, Cr, As, Ni appear mainly in residual forms; Pb appears mainly in reducible form, Cd appears mainly in acid-soluble form; Cu and Zn appear dispersedly in different forms. While Cd content is the highest, As content is the lowest in the proportion of the non-residual form. Furthermore, the superficial distribution of non-residual forms of heavy metals is consistent with that of total contents. It has been proved that employing the total content of heavy metals to determine the pollution degrees in this area is more reliable than other extent methods . The source analysis shows that the pollutants are mainly anthropogenic materials (including industrial wastewater, sewage, etc.) and secondly the input of natural weathering products.