Geology & Isotope Geology Division, Geological Survey of India, 15 A & B Kyd Street, Kolkata-700016, India.
Geology & Isotope Geology Division, Geological Survey of India, 15 A & B Kyd Street, Kolkata-700016, India.
Chemosphere. 2018 Apr;197:152-164. doi: 10.1016/j.chemosphere.2018.01.016. Epub 2018 Jan 8.
A geochemical study of the trace metals and lead isotopic ratios of soil and sediments in Korba, Chhattisgarh, India is presented here for the first time. Korba, the nation's 'power hub' is also the fifth among its eighty-eight most critically polluted industrial hotspots. A very high mean concentration (in mg kg-1) of V (308), Cr (567), Mn (3442), Co (92), Cu (218), Zn (426), Pb (311), Th (123) and U (32) characterized the sediments of the studied area with mean I values of the trace metals ranging from -2.29 to 3.27. In the two-ratio scatter Pb isotope plot of the different environmental matrices, except for human blood, coal, soil, sediments, non-washed leaves, flyash and diesel overlapped linearly in the mixing line between diesel as the highest anthropogenic end member and a core sediment fraction representing its geogenic counterpart. The mean Pb/Pb Pb ratio decreased in the order of diesel (0.9012) > flyash (0.8757) > coal (0.8498) soils and sediments (0.8374) > lowest core sediment fraction (0.8017). Principal Component Analysis (PCA) of the trace metal data extracted V, Cr, Cu, Zn, Pb, U and Th in the first component PC1. The northeastern part of the study area revealed major hotspots of V, Cu, Co, Zn and Pb near the flyash dykes of the power stations. Human blood used as a biomarker for Pb pollution in this study had a mean blood lead level of 28 μg/dl with a distinctive high Pb/Pb ratio of 0.8828.
本文首次对印度恰蒂斯加尔邦科尔巴的土壤和沉积物中的微量元素和铅同位素比值进行了地球化学研究。科尔巴是印度的“电力枢纽”，也是该国 88 个污染最严重的工业热点地区中排名第五的地区。研究区域的沉积物中 V（308）、Cr（567）、Mn（3442）、Co（92）、Cu（218）、Zn（426）、Pb（311）、Th（123）和 U（32）的平均浓度（mg kg-1）非常高，痕量金属的 I 值平均值范围为-2.29 至 3.27。在不同环境基质的双比值散射 Pb 同位素图中，除了人血、煤、土壤、沉积物、未清洗的叶子、飞灰和柴油外，其余的都在线性地落在以柴油为最高人为端元、以代表其地球成因对应物的核心沉积物部分的混合线上。Pb/Pb Pb 比值按柴油（0.9012）＞飞灰（0.8757）＞煤（0.8498）＞土壤和沉积物（0.8374）＞最低核心沉积物部分（0.8017）的顺序降低。从痕量金属数据中提取出 V、Cr、Cu、Zn、Pb、U 和 Th，主成分分析（PCA）显示在第一成分 PC1 中。研究区的东北部地区在火电站的飞灰堤坝附近显示出 V、Cu、Co、Zn 和 Pb 的主要热点。本研究中用作 Pb 污染生物标志物的人血的平均血铅水平为 28 μg/dl，Pb/Pb Pb 比值明显较高，为 0.8828。
