International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, Heilongjinag, China.
Department of Civil Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, India.
Bull Environ Contam Toxicol. 2020 May;104(5):602-608. doi: 10.1007/s00128-020-02831-y. Epub 2020 Mar 17.
This study focuses on seasonal variations of heavy metals in the soil around a coal fired thermal power plant in Udupi district, which is a densely populated town in the tropical southwest coast of India. This study, pertaining to 48 soil samples, collected during the pre-monsoon, early-monsoon, monsoon and post-monsoon seasons for one year, reveals that the chemistry of collected soil samples is influenced by non-pedogenic (anthropogenic) sources such as fly-ash deposition from the thermal power plant and vehicular emissions. This was concluded based on grouping of similar behaved elements through correlation-regression analysis. The distance-wise distribution of heavy metals and backward wind-trajectory analysis suggests that pre-monsoon and post-monsoonal samples are more influenced by anthropogenic activities compared to rest of the seasons. This is supported by high concentration of Zn in pre-monsoon (25.21 mg/kg) and post-monsoon (21.32 mg/kg) seasons compared to early-monsoon (17.05 mg/kg) and monsoon (8.60 mg/kg) seasons.
本研究关注印度热带西南海岸人口稠密的乌杜皮区燃煤热电厂周围土壤中重金属的季节性变化。这项为期一年的研究共采集了 48 个土壤样本，分别在旱季前、旱季、雨季和雨季后采集，结果表明，采集土壤样本的化学性质受到非成土（人为）来源的影响，如热电厂的飞灰沉积和车辆排放。这是通过相关回归分析对具有相似行为的元素进行分组得出的结论。重金属的距离分布和逆风轨迹分析表明，与其他季节相比，旱季前和雨季后的样本受人为活动的影响更大。旱季（25.21mg/kg）和雨季（21.32mg/kg）的锌浓度高于雨季前（17.05mg/kg）和雨季（8.60mg/kg），这也支持了这一观点。
