CAJ | 학술논문

采集九龙江河口表层和柱状沉积物样品，对表层沉积物中总砷、不同形态砷和其他重金属元素、有机质含量以及粒径等参数进行测定．分析了柱状沉积物中总砷和各形态砷的含量，结合沉积速率和响应因子，探讨总砷的污染累计特征．结果表明：（1）沉积物中检出的形态砷是 As3＋和As5＋，未检出有机砷．（2）表层沉积物中总砷含量范围为10.03～11.29μg/g，河端总砷含量为11.28μg/g，高于海端总砷含量10.42μg/g．As3＋的含量范围为0.84～1.08μg/g，As5＋的含量范围为6.87～8.99μg/g；As5＋含量表现为河端（8.63μg/g）高于海端（7.31μg/g），As3＋则不明显．（3）有机质含量是影响本区域表层沉积物中砷及其他重金属含量分布的重要因素，粒径与砷及其他重金属显著相关性不强，影响较小．（4）柱状沉积物中总砷含量范围为9.15～13.61μg/g，随深度的变化不明显，人为污染程度较轻．（5）柱状沉积物中As3＋含量介于2.45～5.35μg/g之间，As5＋含量范围为5.58～11.77μg/g，二者含量随深度的增加而降低．
채집구룡강하구표층화주상침적물양품，대표층침적물중총신、불동형태신화기타중금속원소、유궤질함량이급립경등삼수진행측정．분석료주상침적물중총신화각형태신적함량，결합침적속솔화향응인자，탐토총신적오염루계특정．결과표명：（1）침적물중검출적형태신시 As3＋화As5＋，미검출유궤신．（2）표층침적물중총신함량범위위10.03～11.29μg/g，하단총신함량위11.28μg/g，고우해단총신함량10.42μg/g．As3＋적함량범위위0.84～1.08μg/g，As5＋적함량범위위6.87～8.99μg/g；As5＋함량표현위하단（8.63μg/g）고우해단（7.31μg/g），As3＋칙불명현．（3）유궤질함량시영향본구역표층침적물중신급기타중금속함량분포적중요인소，립경여신급기타중금속현저상관성불강，영향교소．（4）주상침적물중총신함량범위위9.15～13.61μg/g，수심도적변화불명현，인위오염정도교경．（5）주상침적물중As3＋함량개우2.45～5.35μg/g지간，As5＋함량범위위5.58～11.77μg/g，이자함량수심도적증가이강저．
A study was carried out to investigate the levels and distributions of total arsenic and arsenic species in surface sediments and core sediments collected from 6 sampling stations located in Jiulongjiang Estuary.Heavy metals,organic mat-ter,particle size and other parameters were determined.Combining the deposition rate with the response factor,the cumula-tive characteristics of total arsenic were studied.Results show that(1)the detected arsenic species of sediment were As3+and As5+.And organic arsenic were not detected.(2)Concentration of total arsenic were in range of 10.03~11.29 μg/g,As3+concentration 0.84~1.08μg/g and As5+concentration 6.87~8.99μg/g.Total arsenic and As5+concentration in river side (11.28,8.63μg/g)was higher than that of seaward(10.42,7.31 μg/g).(3)Correlation analysis found that organic matter content was the main impact factor on arsenic and other heavy metal concentrations in this area,and particle size had little effect.(4)Total arsenic concentrations were in range of 9.15~13.61μg/g in the core sediment suggested slight anthropogen-ic pollution.The trend between total arsenic concentration and increasing depth were not obvious.(5)Concentrations range 2.45~5.35 μg/g for As3+and 5.58~11.77μg/g for As5+.As3+and As5+concentration decreased with depth.