评估里海西部沿海沉积物中的重金属污染。

Assessment of heavy metal pollution in coastal sediments of the western Caspian Sea.

机构信息

Institute of Radiation Problems of ANAS, Baku, Azerbaijan.

出版信息

Environ Monit Assess. 2020 Jul 9;192(8):500. doi: 10.1007/s10661-020-08401-3.

Abstract

The distribution of heavy metals in sediment samples from the western Caspian Sea coast (near industrial region, Sangachal Terminal) was investigated to obtain information about heavy metal pollution. Forty-three surface sediment samples were collected and analyzed for heavy metals (As, Ba, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, V, and Zn) using an Agilent 7700x inductively coupled plasma - mass spectrometer system. Hg concentrations were detected by cold vapor atomic absorption spectrometry using Varian SpectrAA 220FS + VGA-77 system. The average concentrations of these heavy metals at the same sampling locations followed the order of Fe > Mn > Ba > Zn > Cr > Ni > Cu > As > Pb > Co > Se > Mo > Cd > Hg. Single element pollution index values including geo-accumulation index (I), contamination factor (Cf), and enrichment factor (Ef) were used to evaluate contamination with heavy metals in sediment samples. Three integrated indexes were used for assessing the degree of pollution: degree of contamination (DC), pollution load index (PLI), and ecological risk index (RI).

摘要

研究了里海西部海岸（靠近工业区，桑加恰尔码头）沉积物样本中的重金属分布情况，以获取有关重金属污染的信息。采集了 43 个表层沉积物样本，并使用安捷伦 7700x 电感耦合等离子体质谱系统对重金属（砷、钡、镉、钴、铬、铜、铁、锰、钼、镍、铅、钒和锌）进行了分析。使用瓦里安 SpectrAA 220FS+VGA-77 系统通过冷原子吸收光谱法检测汞浓度。在相同采样地点，这些重金属的平均浓度依次为 Fe＞Mn＞Ba＞Zn＞Cr＞Ni＞Cu＞As＞Pb＞Co＞Se＞Mo＞Cd＞Hg。采用地质累积指数（I）、污染因子（Cf）和富集因子（Ef）等单一元素污染指数值来评估沉积物样品中重金属的污染程度。还使用了三个综合指数来评估污染程度：污染程度指数（DC）、污染负荷指数（PLI）和生态风险指数（RI）。