Comparative Assessment of Leaching Tests According to Lixiviation and Geochemical Behavior of Potentially Toxic Elements from Abandoned Mining Wastes

2021 ◽  
Author(s):  
Fredy Guzmán-Martínez ◽  
Julio C. Arranz-González ◽  
María J. García-Martínez ◽  
Marcelo F. Ortega ◽  
Virginia Rodríguez-Gómez ◽  
...  
Keyword(s):  
Toxic Elements ◽  
Potentially Toxic Elements ◽  
Comparative Assessment ◽  
Mining Wastes ◽  
Leaching Tests ◽  
Geochemical Behavior

scholarly journals Quantification of Potentially Toxic Elements in Degraded Mining Soils and Medicinal Plants: A Case Study of Indus Kohistan Region Northern Pakistan

2021 ◽  
Author(s):  
Waseem sardar ◽  
Aziz Ur Rahman ◽  
javed nawab ◽  
Sardar Khan ◽  
Abid Ali ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Toxic Elements ◽  
Translocation Factor ◽  
Contamination Factor ◽  
Absorption Spectrometry ◽  
Potentially Toxic Elements ◽  
Pollution Indices ◽  
Mining Wastes ◽  
Mining Soil ◽  
Open Dumping

Abstract In recent years, a series of environmental and ecological problems have occurred due to enhanced anthropogenic disturbances for precious minerals mining. Traditional medicines have become an important pillar in national homeopathic treatment system especially in mountainous environment of developing countries. The current study investigates the level of potentially toxic elements ( PTEs ) contamination in degraded mining soil and medicinal plants along the mafic-ultramafic rocks in the Kohistan region. Soil samples and medicinal plant species were collected from the degraded mining area and were screened for PTEs (Pb, Cr, Ni, Mn, Zn, and Cd) using atomic absorption spectrometry. Various pollution indices were used for PTEs such as contamination factor (CF), pollution load index (PLI) and translocation factor (TF) in degraded mining soil and medicinal plants. The mean concentration of PTEs found in soil were in order of Mn>Ni>Cr >Pb>Zn>Cd, while in medicinal plants were Pb>Cr>Mn>Ni>Zn>Cd. Highest bioaccumulation was observed in Ajuga bracteosa (Cr=349 mg kg –1 ), Phlomis bracteosa (Pb=335 mg kg –1 ), Chenopodium ambrosioides (Mn = 304.3 mg kg –1 ), Isatis costata (Ni=169 mg kg –1 ), Ajuga parviflora (Zn = 38.4 mg kg –1 ) and Salvia moorcoftiana (Cd=11 mg kg –1 ). Furthermore, the concentrations of PTEs were significantly higher ( p <0.001) in degraded mining soil and medicinal plants than the reference site, which may be attributed to the mining and open dumping of mining wastes. The present study revealed that chromite mining and open dumping of mining wastes can cause serious environmental problem in the study area. Furthermore, medicinal plants grown in degraded mining soil may pose risk to the local inhabitants as most of the people consume these plants for various health problems.

scholarly journals Current Status and Temporal Trend of Potentially Toxic Elements Pollution in Agricultural Soil in the Yangtze River Delta Region: A Meta-Analysis

2021 ◽  
Vol 18 (3) ◽  
pp. 1033
Author(s):  
Shufeng She ◽  
Bifeng Hu ◽  
Xianglin Zhang ◽  
Shuai Shao ◽  
Yefeng Jiang ◽  
...  
Keyword(s):  
Yangtze River ◽  
Agricultural Soil ◽  
Toxic Elements ◽  
Temporal Trend ◽  
Meta Analysis ◽  
Yangtze River Delta ◽  
Potentially Toxic Elements ◽  
River Delta ◽  
The Yangtze River ◽  
The Yangtze River Delta

Potentially toxic elements (PTEs) pollution in the agricultural soil of China, especially in developed regions such as the Yangtze River Delta (YRD) in eastern China, has received increasing attention. However, there are few studies on the long-term assessment of soil pollution by PTEs over large regions. Therefore, in this study, a meta-analysis was conducted to evaluate the current state and temporal trend of PTEs pollution in the agricultural land of the Yangtze River Delta. Based on a review of 118 studies published between 1993 and 2020, the average concentrations of Cd, Hg, As, Pb, Cr, Cu, Zn, and Ni were found to be 0.25 mg kg−1, 0.14 mg kg−1, 8.14 mg kg−1, 32.32 mg kg−1, 68.84 mg kg−1, 32.58 mg kg−1, 92.35 mg kg−1, and 29.30 mg kg−1, respectively. Among these elements, only Cd and Hg showed significant accumulation compared with their background values. The eastern Yangtze River Delta showed a relatively high ecological risk due to intensive industrial activities. The contents of Cd, Pb, and Zn in soil showed an increasing trend from 1993 to 2000 and then showed a decreasing trend. The results obtained from this study will provide guidance for the prevention and control of soil pollution in the Yangtze River Delta.

scholarly journals Dietary exposure to potentially toxic elements through sushi consumption in Catalonia, Spain

2021 ◽  
pp. 112285
Author(s):  
Neus González ◽  
Eudald Correig ◽  
Isa Marmelo ◽  
António Marques ◽  
Rasmus la Cour ◽  
...  
Keyword(s):  
Toxic Elements ◽  
Dietary Exposure ◽  
Potentially Toxic Elements

Purified montmorillonite as a nano-adsorbent of potentially toxic elements from environment: an overview

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Zahra Biglari Quchan Atigh ◽  
Pourya Sardari ◽  
Ebrahim Moghiseh ◽  
Behnam Asgari Lajayer ◽  
Andrew S. Hursthouse
Keyword(s):  
Toxic Elements ◽  
Potentially Toxic Elements ◽  
Nano Adsorbent

scholarly journals Human Health Risk Assessment for Exposure to Potentially Toxic Elements in Polluted Rivers in the Ecuadorian Amazon

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 613
Author(s):  
Samantha Jiménez-Oyola ◽  
Kenny Escobar Segovia ◽  
María-Jesús García-Martínez ◽  
Marcelo Ortega ◽  
David Bolonio ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Cancer Risk ◽  
Health Risk ◽  
Human Health ◽  
Health Risk Assessment ◽  
Toxic Elements ◽  
Human Health Risk ◽  
Potentially Toxic Elements ◽  
Ecuadorian Amazon ◽  
Polluted Rivers

Anthropogenic activities performed in the Ecuadorian Amazon have released potentially toxic elements (PTEs) into the rivers, causing severe environmental pollution and increasing the risk of exposure to the residents of the surrounding areas. This study aims to carry out a human health risk assessment using deterministic and probabilistic methods to estimate the hazard index (HI) and total cancer risk (TCR) related to multi-pathway human exposure to PTEs in polluted rivers. Concentrations of Al, Cd, Cr, Cu, Hg, Ni, Pb, and Zn in surface water and sediment samples from rivers on the Ecuadorian Amazon were considered to assess the potential adverse human health effects. As a result, deterministic and probabilistic estimations of cancer and non-cancer risk through exposure to surface waters and sediments were above the safety limit. A sensitivity analysis identified the concentration of PTEs and the exposure duration (ED) as the two most important variables for probabilistic health risk assessment. The highest risk for receptors was related to exposure to polluted sediments through incidental ingestion and dermal contact routes. According to the deterministic estimation, the human health risk through ingestion of water was above the threshold in specific locations. This study reveals the potential health risk to which the population is exposed. This information can be used as a baseline to develop public strategies to reduce anthropogenic pollution and exposure to PTEs in Ecuadorian Amazon rivers.

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