Geochemistry and mass balance of selected heavy metals in East Kolkata Wetlands, a Ramsar site of West Bengal, India

被引：5
|
作者：
Avijit, Das [1 ]
Kamalakannan, D. [1 ]
机构：
[1] Geol Survey India, Geochronol & Isotope Geol Div, 15 A&B Kyd St, Kolkata 700016, India
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2023年 / 445卷
关键词：
Trace metals; Remediation; Mass balance; Wastewater; WASTE-WATER; CONTAMINATION; AQUACULTURE; SEDIMENTS; TOXICITY; PONDS; FISH;
D O I：
10.1016/j.jhazmat.2022.130574
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A geochemical profile of the East Kolkata Wetlands and its efficiency in treating municipal and industrial wastewater is presented in this study. The mean concentration (mg/L) of some of the trace metals in the un-treated pond waters decreased in the order of Mn (12.6) > Cr (11.8) > Fe (8.0) > Ni (6.2) > Zn (2.7) > Cu (2.6) > As (2.0) > Pb (1.8) > Cd (0.2). The corresponding mean concentration (mg/kg, dry weight) of the sediment trace metals decreases in the order of Fe (446.2) > Mn (114.1) > As (112.4) > Cr (30) > Zn (9.0) > Ni (6.8) >Cu (5.7) > Pb (3.0) > Cd (0.5). Our study found that the bioremediation of the wastewaters containing Al, Cr, Mn, Fe, Pb, Ni, Cu, and Zn was not uniform in all the ponds. Although reduced concentrations of Mn and Fe were found in 98% of the treated pond waters, 56% of the ponds could not remove Zn and As. Mass balance calculation showed that the differential load after microbial treatment of the wastewaters decreased in the order of Cr (differential load 3463 kg/day), Ni (1743 kg/day), Cu and Zn (681, 684 kg/day, respectively).
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页数：10
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