Heavy Metal Distribution Characteristics, Water Quality Evaluation, and Health Risk Evaluation of Surface Water in Abandoned Multi-Year Pyrite Mine Area

Abstract

Acid mine drainage (AMD) is a major anthropogenic source of heavy metal discharge worldwide. However, little research has been carried out on the development of AMD in abandoned pyrite mines and the heavy metal contamination of mine surface water. The aim of this study was to investigate and assess heavy metal pollution in three streams within an abandoned pyrite mine area in southeastern Shaanxi Province, China. Surface water pollution was assessed using the pollution index assessment method and the health risk assessment model. The results showed that the combined heavy metal pollution indices of the surveyed rivers were Tielu Creek (4699.227), Jiancao Creek (228.840), and Daoban Creek (68.106). After multivariate statistical analysis, it was found that the tailings slag and mine chamber in the abandoned mine area were the main causes of AMD, and AMD posed a serious risk of heavy metal pollution to the surrounding waters. The risk of carcinogenicity of heavy metals is also quite high in the surface water of mining area. Therefore, there is an urgent need to ecologically manage heavy metal pollution from abandoned mine sites, and this study provides insights into understanding heavy metal pollution in the aquatic environment of abandoned mine sites.

Avaliação da qualidade de águas superficiais: revisão de literatura

“…Isso é fundamental para tomada de decisão mais assertiva pelos órgãos gestores, visando alcançar a gestão sustentável dos recursos hídricos. Na literatura, muitos autores utilizam os índices de qualidade de água e índice de poluição para avaliar de forma mais eficiente a qualidade das águas superficiais, levando em consideração a presença ou não de contaminantes, além da avaliação da concentração dos elementos químicos e outros parâmetros (Carvalho et al, 2022;Findik;Aras, 2022;Fu et al, 2022;Habesoglu;Atici, 2022;Mollo et al, 2022;Tenebe et al, 2022;Yan;Shen;Zhou, 2022;Jiao et al, 2023).…”

“…As fontes de poluentes apresentam diferentes características em relação aos contaminantes que liberam, como por exemplo, os contaminantes orgânicos (que não são biodegradáveis), as substâncias químicas tóxicas e os nutrientes (Noori et al, 2019;Varol, 2020;Wu et al, 2018). É importante destacar que, dentre esses diferentes tipos de contaminantes, os elementos químicos merecem atenção especial, já que podem ser prejudiciais ao meio ambiente em determinadas concentrações (Bashar;Fung, 2020;Jiao et al, 2023;Tenebe et al, 2022). A Figura 1 ilustra como esses elementos são expostos ao meio ambiente e às pessoas, por meio de diferentes vias de exposição, incluindo as plantas, o solo e as águas de rios e lagos, por exemplo.…”

Analytical and Biological Evaluation of Chromium Complex with Organic Detector NTADBrP: Stability, Calibration, and Inhibition Studies

“…Thiazole compounds and their derivatives are characterized by high molecular weights and limited solubility in water, attributes stemming from their covalent bonds [1][2][3]. These compounds have various applications, notably in spectrophotometric and fluorescence assessments of positive ions and as precipitants due to their chromophoric groups [4][5][6]. Chromium, a key element in the VIB family of the periodic table, offers distinct properties such as a small atomic size, high melting point, and resistance to corrosion [7][8][9][10][11].…”