赣江流域水体中可溶态镉的时空分布特征及水质评价  

Spatial and Temporal Distribution of Dissolved Cadmium in and Water Quality Assessment of the Water Body of the Ganjiang River Catchment

作　　者：张宝军[1,2] 朱蒙曼 王鹏[3] 袁萍[1] 程祥磊[1] 蔡红平[1] 

机构地区：[1]南昌大学公共卫生学院,江西南昌330006 [2]江西省水土保持科学研究院,江西南昌330029 [3]江西师范大学地理与环境学院,江西南昌330022

出　　处：《生态与农村环境学报》2014年第4期495-499,共5页Journal of Ecology and Rural Environment

基　　金：国家自然科学基金(41161016;41201033);江西省土壤侵蚀与防治重点实验室开放研究基金(JXSB201204)

摘　　要：为了解赣江流域水体中镉的分布特征,在赣江流域的重点河段采集44个水样(丰水期和枯水期各22个),采用氢化物发生-原子荧光光谱法测定水体中可溶态镉浓度。结果表明,赣江水体ρ(可溶态镉)〔(0.112±0.111)μg·L-1〕较低,丰水期水体ρ(可溶态镉)〔(0.095±0.116)μg·L-1〕显著低于枯水期〔(0.128±0.160)μg·L-1〕(P<0.05)。干流水体ρ(可溶态镉)〔(0.116±0.038)μg·L-1〕略低于支流〔(0.121±0.102)μg·L-1〕,且从上游到下游呈逐步下降趋势。从水体可溶态镉浓度的空间分布来看,赣州城区至峡江县城之间应该是赣江流域水体镉污染的重点监控区域。To explore how cadmium （Cd） is distributed in the water body of the Ganjiang River catchment,44 water samples （22 in rainy period and 22 in dry period） were collected from key sections of the rivers during the rainy and dry periods for analysis of contents of the dissolved Cd using the HG-AFS method （hydride generation-atomic fluorescence spectrophotometer）.Results show that the mean content of dissolved Cd in the river water was very low （0.112±0.111μg·L^-1）,and there was a significant seasonal difference in content of dissolved Cd in the water between the rainy（0.095 ±0.116μg·L^-1）and the dry periods（0.128±0.160μg·L^-1）（P〈0.05）.The content of dissolved Cd in the trunk stream （0.116±0.038μg·L^-1） was slightly lower than those in the tributaries （0.121±0.102μg·L^-1） and declined with the water flowing from the upper reaches to the lower.In light of the spatial distribution of dissolved Cd in the river,the section of the Ganjiang River between the Ganzhou City and Xiajiang County should be set as the critical section for monitoring of Cd pollution of the Ganjiang River Catchment.

关 键 词：赣江 镉 时空变化 水质评价 

分 类 号：X522[环境科学与工程—环境工程] X824