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Evaluating the health risks of heavy metals from vegetables grown on soil irrigated with untreated and treated wastewater in Arba Minch, Ethiopia
Guadie, Awoke; Yesigat, Asamin; Gatew, Shetie; Worku, Abebe; Liu, Wenzong; Ajibade, Fidelis Odedishemi; Wang, Aijie
2021-03-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume761Pages:-
AbstractAvailable freshwater scarcity significantly affects sustainable food production for the rapidly growing population. This problem has forced people in most parts of the world to use wastewater as a viable solution. However, wastewater reuse has some deleterious effects on human and environmental health. This study was designed to investigate the health risks (HRs) of heavy metals (HMs) from vegetables irrigated with untreated and treated wastewater. The composite wastewater was collected at various sites in Arba Minch town and subjected to aerobic-anoxic treatment. Treated and untreated wastewater (UTW) was used to irrigate vegetables (lettuce, cabbage and tomato), and HM results were compared with the control (tap water) and standards. Water, soil and vegetables were investigated for various physical and chemical properties. Human health effects due to vegetable consumption were analyzed using HR-index (HRI), target hazard quotient (THQ) and hazard index (HI). The results revealed that most of the water quality indexes were significantly enhanced after aerobic-anoxic treatment, suggesting that wastewater collected from different sires was suitable for biodegradation. Soil physicochemical analyses also showed that pH, cation exchange capacity, organic carbon and organic matter were higher for UTW irrigated soil. Heavy metal concentrations were relatively greater in soils than water used for irrigation purposes and vegetables. The HM concentration in vegetables was higher for UTW than for treated and tap water irrigated vegetables. In vegetables, the order of HM content was Fe > Mn > Zn > Pb > Cu > Cd. Tomato followed by cabbage and lettuce accumulated significant amount of HMs (Fe > Mn > Zn > Pb > Cu > Cd) in their different organs (fruit/leaf>root>stem). The individual and combined health indexes (HRI, THQ, and HI) showed that Pb and Cd have values greater than unity for wastewater irrigated vegetables, which could result in non carcinogenic disease for short/lifetime exposure in adults and children. Overall, consumption of vegetables can be safer when grown with treated effluent than with UTVV. (C) 2020 Elsevier B.V. All rights reserved.
Department中国科学院环境生物技术重点实验室
KeywordArba Minch Health risk Heavy metal Vegetable Wastewater
WOS Research AreaEnvironmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/46114
Collection中国科学院环境生物技术重点实验室
Affiliation1.Arba Minch Univ, Dept Biol, Coll Nat Sci, Arba Minch 21, Ethiopia
2.Chinese Acad Sci, Key Lab Environm Biotechnol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
3.Addis Ababa Sci & Technol Univ, Coll Biol & Chem Engn, Dept Environm Engn, Addis Ababa 16417, Ethiopia
4.Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
Recommended Citation
GB/T 7714
Guadie, Awoke,Yesigat, Asamin,Gatew, Shetie,et al. Evaluating the health risks of heavy metals from vegetables grown on soil irrigated with untreated and treated wastewater in Arba Minch, Ethiopia[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,761:-.
APA Guadie, Awoke.,Yesigat, Asamin.,Gatew, Shetie.,Worku, Abebe.,Liu, Wenzong.,...&Wang, Aijie.(2021).Evaluating the health risks of heavy metals from vegetables grown on soil irrigated with untreated and treated wastewater in Arba Minch, Ethiopia.SCIENCE OF THE TOTAL ENVIRONMENT,761,-.
MLA Guadie, Awoke,et al."Evaluating the health risks of heavy metals from vegetables grown on soil irrigated with untreated and treated wastewater in Arba Minch, Ethiopia".SCIENCE OF THE TOTAL ENVIRONMENT 761(2021):-.
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