Occurrence of Trace Metals in Food Crops Grown on the Mbale Dumpsite, Uganda, and Human Health Risks

2020 ◽  
Vol 16 (3) ◽  
pp. 362-377
Author(s):  
Florence Barbara Awino ◽  
William Andrew Maher ◽  
Frank Krikowa ◽  
A Jasmyn J Lynch
2021 ◽  
Vol 80 (11) ◽  
Author(s):  
Salwinder Singh Dhaliwal ◽  
Raj Setia ◽  
Vinod Kumar ◽  
Tapan Ghosh ◽  
Sagar Taneja ◽  
...  

2019 ◽  
Vol 130 ◽  
pp. 104899 ◽  
Author(s):  
Jian Wang ◽  
Emmanuel Stephen Odinga ◽  
Wei Zhang ◽  
Xian Zhou ◽  
Bing Yang ◽  
...  

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10266 ◽  
Author(s):  
Fabrício Â. Gabriel ◽  
Rachel Ann Hauser-Davis ◽  
Lorena Soares ◽  
Ana Carolina A. Mazzuco ◽  
Rafael Christian Chavez Rocha ◽  
...  

Background The Rio Doce estuary, in Brazil, was impacted by the deposition of iron mine tailings, caused by the collapse of a dam in 2015. Based on published baseline datasets, the estuary has been experiencing chronic trace metal contamination effects since 2017, with potential bioaccumulation in fishes and human health risks. As metal and metalloid concentrations in aquatic ecosystems pose severe threats to the aquatic biota, we hypothesized that the trace metals in estuarine sediments nearly two years after the disaster would lead to bioaccumulation in demersal fishes and result in the biosynthesis of metal-responsive proteins. Methods We measured As, Cd, Cr, Cu, Fe, Mn, Pb, Se and Zn concentrations in sediment samples in August 2017 and compared to published baseline levels. Also, trace metals (As, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Se and Zn) and protein (metallothionein and reduced glutathione) concentrations were quantified in the liver and muscle tissues of five fish species (Cathorops spixii, Genidens genidens, Eugerres brasilianus, Diapterus rhombeus and Mugil sp.) from the estuary, commonly used as food sources by local populations. Results Our results revealed high trace metal concentrations in estuarine sediments, when compared to published baseline values for the same estuary. The demersal fish species C. spixii and G. genidens had the highest concentrations of As, Cr, Mn, Hg, and Se in both, hepatic and muscle, tissues. Trace metal bioaccumulation in fish was correlated with the biosynthesis of metallothionein and reduced glutathione in both, liver and muscle, tissues, suggesting active physiological responses to contamination sources. The trace metal concentrations determined in fish tissues were also present in the estuarine sediments at the time of this study. Some elements had concentrations above the maximum permissible limits for human consumption in fish muscles (e.g., As, Cr, Mn, Se and Zn), suggesting potential human health risks that require further studies. Our study supports the high biogeochemical mobility of toxic elements between sediments and the bottom-dwelling biota in estuarine ecosystems.


2013 ◽  
Vol 244-245 ◽  
pp. 225-239 ◽  
Author(s):  
Mojgan Yeganeh ◽  
Majid Afyuni ◽  
Amir-Hosein Khoshgoftarmanesh ◽  
Loghman Khodakarami ◽  
Manouchehr Amini ◽  
...  

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 783
Author(s):  
Feifei Chen ◽  
Leihua Yao ◽  
Gang Mei ◽  
Yinsheng Shang ◽  
Fansheng Xiong ◽  
...  

Groundwater is a valuable water source for drinking and irrigation purposes in semiarid regions. Groundwater pollution may affect human health if it is not pretreated and provided for human use. This study investigated the hydrochemical characteristics driving groundwater quality for drinking and irrigation purposes and potential human health risks in the Xinzhou Basin, Shanxi Province, North China. More specifically, we first investigated hydrochemical characteristics using a descriptive statistical analysis method. We then classified the hydrochemical types and analyzed the evolution mechanisms of groundwater using Piper and Gibbs diagrams. Finally, we appraised the groundwater quality for drinking and irrigation purposes using the entropy water quality index (EWQI). We assessed the associated human health risks for different age and sex groups through drinking intake and dermal contact pathways. Overall, we found that (1) Ca-HCO3 and Ca·Mg-HCO3 were the dominant hydrochemical types and were mainly governed by rock weathering and water–rock interactions. (2) Based on the EWQI classifications, 67.74% of the groundwater samples were classified as medium quality and acceptable for drinking purpose. According to the values of sodium adsorption ratio (SAR), residual sodium carbonate (RSC) and soluble sodium percentage (%Na), 90.32% of the samples were suitable for irrigation, while the remaining samples were unfit for irrigation because of the high salinity in the groundwater. (3) Some contaminants in the groundwater, such as NO3−, NO2− and F−, exceeded the standard limits and may cause potential risks to human health. Our work presented in this paper could establish reasonable management strategies for sustainable groundwater quality protection to protect public health.


Author(s):  
Ajeet Kumar Pandey ◽  
Sanjay Shakya ◽  
Anil Patyal ◽  
Syed Liaquat Ali ◽  
Dhirendra Bhonsle ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document