中国环境科学
中國環境科學
중국배경과학
CHINA ENVIRONMENTAL SCIENCE
2014年
10期
2660-2668
,共9页
蓝先洪%蜜蓓蓓%李日辉%秦亚超%王中波%陆凯
藍先洪%蜜蓓蓓%李日輝%秦亞超%王中波%陸凱
람선홍%밀배배%리일휘%진아초%왕중파%륙개
渤海东部%黄海北部%重金属%分布特征%控制因素
渤海東部%黃海北部%重金屬%分佈特徵%控製因素
발해동부%황해북부%중금속%분포특정%공제인소
eastern Bohai Sea%northern Yellow Sea%heavy metals%distribution%controlling factors
通过对渤海东部及黄海北部海域138个站位沉积物样品的重金属等含量分析,研究了该海域沉积物重金属元素分布特征及其控制因素.渤海东部及黄海北部海域沉积物中As、Cu、Cd、Cr、Co、Hg、Ni、Pb、V、Zn的平均含量分别为:9.87,20.1,0.15,58.9,11.6,0.02,26.7,23.0,74.0,65.5μg/g;重金属元素Cu、V、Cr、Co、Ni、Zn含量与有机碳含量、小于63μm细粒沉积物呈显著正相关,其在表层沉积物中的分布明显受到有机质含量和沉积物粒径的控制,而As、Hg分布没有明显受到有机质含量和沉积物粒径的影响.富集系数显示, Cr、Co、Ni、Pb、V和Zn为无富集;Cu为轻度富集;As、Cd和Hg为中度富集;依据Q-型聚类分析特征,将研究区域沉积物划分为3个不同的重金属分区,Ⅰ类区沉积物Hg富集程度较高;Ⅱ类区沉积物As富集程度较高;Ⅲ类区重金属元素含量普遍较高,尤其Cu、Zn和Cd含量明显增高.
通過對渤海東部及黃海北部海域138箇站位沉積物樣品的重金屬等含量分析,研究瞭該海域沉積物重金屬元素分佈特徵及其控製因素.渤海東部及黃海北部海域沉積物中As、Cu、Cd、Cr、Co、Hg、Ni、Pb、V、Zn的平均含量分彆為:9.87,20.1,0.15,58.9,11.6,0.02,26.7,23.0,74.0,65.5μg/g;重金屬元素Cu、V、Cr、Co、Ni、Zn含量與有機碳含量、小于63μm細粒沉積物呈顯著正相關,其在錶層沉積物中的分佈明顯受到有機質含量和沉積物粒徑的控製,而As、Hg分佈沒有明顯受到有機質含量和沉積物粒徑的影響.富集繫數顯示, Cr、Co、Ni、Pb、V和Zn為無富集;Cu為輕度富集;As、Cd和Hg為中度富集;依據Q-型聚類分析特徵,將研究區域沉積物劃分為3箇不同的重金屬分區,Ⅰ類區沉積物Hg富集程度較高;Ⅱ類區沉積物As富集程度較高;Ⅲ類區重金屬元素含量普遍較高,尤其Cu、Zn和Cd含量明顯增高.
통과대발해동부급황해북부해역138개참위침적물양품적중금속등함량분석,연구료해해역침적물중금속원소분포특정급기공제인소.발해동부급황해북부해역침적물중As、Cu、Cd、Cr、Co、Hg、Ni、Pb、V、Zn적평균함량분별위:9.87,20.1,0.15,58.9,11.6,0.02,26.7,23.0,74.0,65.5μg/g;중금속원소Cu、V、Cr、Co、Ni、Zn함량여유궤탄함량、소우63μm세립침적물정현저정상관,기재표층침적물중적분포명현수도유궤질함량화침적물립경적공제,이As、Hg분포몰유명현수도유궤질함량화침적물립경적영향.부집계수현시, Cr、Co、Ni、Pb、V화Zn위무부집;Cu위경도부집;As、Cd화Hg위중도부집;의거Q-형취류분석특정,장연구구역침적물화분위3개불동적중금속분구,Ⅰ류구침적물Hg부집정도교고;Ⅱ류구침적물As부집정도교고;Ⅲ류구중금속원소함량보편교고,우기Cu、Zn화Cd함량명현증고.
Based on the concentration of As, Cu, Cd, Cr, Co, Hg, Ni, Pb, V and Zn in sediment samples taken from 138 stations in Eastern Bohai Sea and Northern Yellow Sea, the distribution characteristics and controlling factors of heavy metals in marine sediment were studied. The average concentration of As, Cu, Cd, Cr, Co, Hg, Ni, Pb, V and Zn were 9.87, 20.1, 0.15, 58.9, 11.6, 0.02, 26.7, 23.0, 74.0 and 65.5 μg/g, respectively. Contents of Cu, V, Cr, Co, Ni and Zn showed a significantly positive correlation between organic carbon contents and the amount of fine-grained sediments (<63 μm) and its distribution in surface sediments was controlled obviously by the contents of organic matters and sediment grain sizes while As and Hg distribution was not significantly affected by the contents of organic matters and particle sizes of sediment. Enrichment factors (EF) were calculated to determine whether the observed concentration was higher than background levels. Three groups of elements:(1) Cr, Co, Ni, Pb, V and Zn were at background concentrations;(2) Cu was slightly enriched; and (3) As, Cd and Hg were moderately enriched. According to the Q-type cluster analysis, characteristics of the sediment in the study area could be divided into three different zones of heavy metal distribution. ClassⅠfeatured high Hg enriched sediment;As of Class II region was higher degree of enrichment;Class III region was higher for all heavy metal elements, especially Cu, Zn and Cd.