大鹏澳网箱养殖区沉积物中Cu的分布特征  

The content distribution characteristic of Cu in the sediments of cage culture area in Dapeng′ao Cove in Daya Bay

作　　者：柯常亮[1] 林钦[1] 王增焕[1] 李占东[1] 胡德蓉[1] 

机构地区：[1]中国水产科学研究院南海水产研究所

出　　处：《南方水产》2007年第1期20-25,共6页South China Fisheries Science

基　　金：科技部社会公益研究专项(2000DIB50175)

摘　　要：研究了大鹏澳网箱养殖海域表层沉积物中Cu的平面分布特征，并对采集的沉积物柱状样进行垂直分层分析，以探讨Cu在沉积物中的垂直分布特征。结果表明：（1）网箱养殖区表层沉积物中Cu的含量（范围20．63—78．53mg·kg^-1，均值55．08mg·kg^-1）明显高于对照区表层沉积物中Cu的含量（范围20．68—23．68mg·kg^-1，均值21．87mg·kg^-1）；（2）垂直方向上，网箱养殖区0—15cm段沉积物中Cu的含量变化幅度很大，15cm后Cu的含量变化则相对平缓，而对照区从表层往下Cu的含量变化一直都很平缓，说明网箱区新沉积层的Cu含量受环境扰动的影响较大；（3）与相关水域比较，Cu的含量高于大亚湾的而与具有类似养殖背景的日本Kasumigaura湖养殖区的相吻合；（4）污染评价的结果显示网箱养殖区沉积物Cu的含量劣于我国海洋沉积物一类标准，污染有增加的趋势。根据研究结果，初步推测网箱养殖可能输入Cu元素，造成Cu污染。Distribution characteristic of Cu from surface sediment of Dapeng＇ao Cove was studied. And the hole samples were bedded into several layers to discuss the vertical distribution characteristic of Cu. It shows ： （ 1 ） The contents of Cu （ range ： 20.63 - 78.53 mg·kg^-1, average 55.08 mg·kg^-1） in cage culture are much higher than that （range： 20. 68 - 23.68 mg·kg^-1, average 21.87mg·kg^-1） in control area. （2） In cage culture area, Cu contents change greatly from the depth 0 to 15 cm, slightly after 15 cm, but in control area it always change slightly. （3） Compared with related area, Cu contents are higher than that of Daya Bay, but close to that of Kasumigaura Lake with the similar cage culture background with Dapeng＇ao Cove. （4） The assessment result reveals the contents of Cu in cage culture area are inferior to the first class of Marine Sediment Quality and the pollution condition is deteriorating. According to the results, it can be concluded it may inputs Cu element and causes Cu pollution in the course of cage culture.

关 键 词：大鹏澳 沉积物 网箱养殖 CU 

分 类 号：X171[环境科学与工程—环境科学]