Cyanotoxins in groundwater; occurrence, potential sources, health impacts and knowledge gap for public health

被引:19
作者
Mutoti, Mulalo I. [1 ]
Edokpayi, Joshua N. [2 ]
Mutileni, Ntwanano [1 ]
Durowoju, Olatunde S. [1 ]
Munyai, Fhatuwani L. [3 ]
机构
[1] Univ Venda, Fac Sci Engn & Agr, Dept Earth Sci, Private Bag X5050,Univ Rd, Thohoyandou, Limpopo, South Africa
[2] Univ Venda, Fac Sci Engn & Agr, Dept Geog & Environm Sci, Private Bag X5050,Univ Rd, Thohoyandou, Limpopo, South Africa
[3] Univ Mpumalanga, Fac Agr & Nat Sci, Sch Biol & Environm Sci, ZA-1201 Nelspruit, South Africa
关键词
Cyanobacteria; Groundwater-surface water interaction; Contamination; Cyanotoxins; Microcystins; CYANOBACTERIAL TOXINS; FRESH-WATER; FUTURE CHALLENGES; BANK FILTRATION; MICROCYSTIN; DRINKING; QUALITY; CYLINDROSPERMOPSIN; BREAKTHROUGH; DEGRADATION;
D O I
10.1016/j.toxicon.2023.107077
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
Groundwater is a significant source of water across the world and constitutes about 30% of the earth's fresh-water. This water source is likely to be contaminated by cyanobacteria that produce secondary metabolites called cyanotoxins. Studies on contamination of groundwater by cyanobacteria have been sketchy with limited infor-mation. There is a need for better evidence regarding groundwater contamination by cyanobacteria as their presence in surface water bodies could cause contamination of groundwater via infiltration and percolation during rainfall events or during groundwater-surface water interaction, bank infiltration or water quality ex-change. Therefore, this review is aimed at exploring the occurrences and potential sources of cyanotoxins in groundwater. This was achieved by summarising the existing data on the occurrence of cyanobacteria in groundwater and their potential sources across the world. Groundwater cyanobacteria contamination can possibly pose threat to water quality because many of the cyanotoxins produced by cyanobacteria pose a severe threat to human health, animals and the environment. Concentrations of microcystins (MCs) in groundwater have been recorded in China (Chaohu), Saudi Arabia, and China (Huai River Basin), with concentrations of 1.446 mu g/L, 1.8 mu g/L and 1.07 mu g/L, respectively. In humans, exposure to these cyanotoxins can cause symptoms such as vomiting, diarrhea, and skin irritation, to mention a few. This work highlights the importance of providing information or knowledge regarding public health implications of exposure to groundwater contam-inated with cyanotoxins and the need to undertake risk management actions through national and international regulation. This review also points out current knowledge gaps, which could lead to future research.
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页数:9
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