|
| 霞湾港沉积物铅形态及垂直分布特征 |
| Chemical Speciation and Vertical Distribution Characteristics of Lead in Sediments of Xiawan Port |
| |
| DOI： |
| 中文关键词: 铅形态 垂直分布 沉积物 霞湾港 |
| 英文关键词: Lead speciation Vertical distribution Sediments Xiawan Port |
| 基金项目:环保公益性行业科研专项“重点防控重金属关键先进监测技术适用性研究”基金资助项目（20130950） |
|
| 摘要点击次数: 884 |
| 全文下载次数: 0 |
| 中文摘要: |
| 采用Tessier五步浸提法对湘江霞湾港的沉积物垂直样品进行处理，分别提取可交换态、碳酸盐结合态、铁锰氧化物结合态、有机结合态和残渣态5种形态的铅，并采用电感耦合等离子体发射光谱法（ICP AES）测定其含量。结果表明，位于霞湾港下游的采样点2的铅污染较严重。3个采样点位沉积物中的铅总质量比为116.52 mg/kg～262.85 mg/kg，不同深度沉积物中铅主要以铁锰氧化物态和残渣态存在，其比例为60.5%～87.0%，而可被生物吸收利用的有效态（碳酸盐结合态和可交换态）铅占比相对较低，仅为2.8%～11.1% |
| 英文摘要: |
| Tessier sequential extraction procedure was applied to the speciation analysis of lead in sediments of Xiawan Port. The speciation of lead was partitioned into five: exchangeable speciation, carbonate binding species, Fe Mn oxide binding species, organic binding species and residual. Lead was determined by inductively coupled plasma atomic emission spectrometry (ICP AES). The results showed that lead pollution was the most serious at sampling site No.2, downriver Xiawan Port. The concentrations of lead from the three sampling sites were in 116.52 mg/kg ～262.85 mg/kg. In different depths of sediment, lead existed mainly in Fe Mn oxide binding and residual species, accounting for 60.5%～87.0%. The percent of lead in available form (including carbonate binding and exchangeable species) was very low， only 2.8%～11.1%. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
