Heavy metal accumulation and genotoxic effect of long-term wastewater irrigated peri-urban agricultural soils in semiarid climate

Oubane, Mohamed; Khadra, Ahmed; Ezzariai, Amine; Kouisni, Lamfeddal; Hafidi, Mohamed

doi:10.1016/j.scitotenv.2021.148611

Cited by 30 publications

(15 citation statements)

References 77 publications

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“…It is a common practice to use industrial and municipal wastewater to irrigate crops in suburban areas of different parts of the world [1,2]. It is reported that agricultural land greater than 4-6 million hectares receives municipal wastewater irrigation [3].…”

Section: Introductionmentioning

confidence: 99%

“…Countries with relatively large areas of land under municipal wastewater irrigation include China (1,330,000), Mexico (260,000), India (75,000), Chile (40,000), Syria (40,000), Pakistan (35,600), and Turkey (9165) in descending order of hectares [4,5]. Unfortunately, municipal wastewater contains variable amounts of heavy metals (HMs) [1,2]. The presence of these HMs in wastewater is mainly dependent on several factors like the sorts of industries in that area, the lifestyle of the people, and the awareness of the public regarding the impacts of the pollutants on the environment [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Soil Application of Chitosan and Foliar Melatonin on Growth, Photosynthesis, and Heavy Metals Accumulation in Wheat Growing on Wastewater Polluted Soil

et al. 2022

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Due to freshwater scarcity in developing countries, irrigating the arable land with wastewater poses potential ecological risks to the environment and food quality. Using cheap soil amendments and foliar application of a newly discovered molecule “melatonin” (ML) can alleviate these effects. The objectives of this pot study were to evaluate the effectiveness of the sole addition of chitosan (CH) and sugar beet factory lime (SBL) in wastewater impacted soil, foliar application of ML, and combining each soil amendment with ML on the heavy metals (HMs) accumulation, growth, nutritional quality and photosynthesis in wheat. Results showed that CH was more effective than SBL for reducing HMs bioavailability in soil, HMs distribution in plants, improving photosynthesis, nutritional quality, and growth. ML application also influenced plant parameters but less than CH and SBL. The CH+ML treatment was the most effective for influencing plant parameters and reducing HMs bioavailability in the soil. Compared to control, CH+ML significantly reduced the concentrations of Pb, Cd, Cr, Ni, Cu, and Co in roots, shoots, and grain up to 89%. We conclude that adding CH+ML in wastewater impacted soils can remediate the soil; reduce HMs concentrations in plants; and improve their photosynthesis, plant growth, grain yield, and nutrition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Soil Application of Chitosan and Foliar Melatonin on Growth, Photosynthesis, and Heavy Metals Accumulation in Wheat Growing on Wastewater Polluted Soil

et al. 2022

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“…This problem was aggravated by the intensive use of wastewater (low water quality) in the irrigation of cultivated plants, which contains many transferred pollutants to the food chain of humans and animals causing potential health risks in the long term [20]. Several studies reported the problems of saline and low water quality and their impacts on cultivated plants [20,21], soil quality [22,23], and projected human health [18,19]. Many materials have been applied to remediate this low water quality such as hydrogel [24], biochar [25], magnetic bentonite [26], and nanomaterials or nanoparticles [27,28].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Production of Tomato Plants (Solanum lycopersicum L.) under Low-Quality Irrigation Water as Affected by Bio-Nanofertilizers of Selenium and Copper

et al. 2022

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Under the global water crisis, utilizing low-quality water sources in agriculture for irrigation has offered an effective solution to address the shortage of water. Using an excess of low-quality water sources may cause serious risks to the environment, which threaten crop safety and human health. Three kinds of irrigation water (0.413, 1.44, and 2.84 dS m−1) were selected under foliar-applied bio-nanofertilizers of selenium (100 mg L−1) and copper (100 mg L−1) in individual and/or combined application. The nanofertilizers were tested on the production of tomato under greenhouse. After harvesting, the quality of tomato yield and soil biology was evaluated. Using saline water for irrigation caused many main features in this study such as increasing the accumulation of salts, soil organic matter, and CaCO3 in soil by 84.6, 32.3, and 18.4%, respectively, compared to control. The highest tomato yield (2.07 kg plant−1) and soluble solids content (9.24%) were recorded after irrigation with low water quality (2.84 dS m−1) and nano-Cu fertilization. The plant enzymatic antioxidants and soil biological activity were decreased in general due to the salinity stress of irrigation water. After 30 days from transplanting, all studied soil biological parameters (soil microbial counts and enzymes) were higher than the same parameters at harvesting (80 days) under different categories of water quality. The values of all soil biological parameters were decreased by increasing water salinity. This study was carried out to answer the question of whether the combined nanofertilizers of selenium and copper can promote tomato production under saline water irrigation. Further investigations are still needed concerning different applied doses of these nanofertilizers.

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“…Tertiary water, which can also be referred to as reclaimed water or treated wastewater, requires handling urban wastewater in treatment plants in order to develop an alternative water source to irrigate crops [21]. This treatment should be adequate and controlled before irrigating crops to avoid microbiological or physicochemical soil alterations or high heavy metal concentrations that may damage human health [22][23][24]. Reclaimed water implementation for irrigation, as well as reducing freshwater extractions, reduces the possibility of wastewater spilling into water bodies, preventing the deterioration of aquatic ecosystems and lessening environmental pollution [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Farmers’ Attitudes towards Irrigating Crops with Reclaimed Water in the Framework of a Circular Economy

et al. 2022

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In a global situation where water constraints are a daily concern and expected to worsen in the upcoming years, finding new water alternatives to guarantee its supply is of critical importance. Against this background, reclaimed water has proved to be a sustainable alternative that recycles wastewater from a circular economy approach, thus enhancing water availability for key sectors such as agriculture. In such a context where public policies should encourage the implementation of this sustainable resource that helps reduce climate change by allowing wastewater reuse, there is too often a lack of knowledge of farmers’ perceptions, thus resulting in them being ineffective. In this sense, studying and analyzing agriculturalists’ perceptions is of interest for the development of appropriate policies that truly foster reclaimed water use in agriculture and enhance its shift from waste to resource. For this research 231 farmers, both long-time users of reclaimed water and non-users, were surveyed to find common and differing attitudes and perceptions. Results show how once farmers start irrigating their crops with this alternative resource there is a marked improvement in their opinion. The high price is the most widespread barrier, which can be tempered with public subsidies that absorb part of this cost. The insights obtained from this research may be of interest to other regions, especially for those in arid and semi-arid climates where water scarcity is a critical problem and sustainability a growing concern.

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Heavy metal accumulation and genotoxic effect of long-term wastewater irrigated peri-urban agricultural soils in semiarid climate

Cited by 30 publications

References 77 publications

Effects of Soil Application of Chitosan and Foliar Melatonin on Growth, Photosynthesis, and Heavy Metals Accumulation in Wheat Growing on Wastewater Polluted Soil

Effects of Soil Application of Chitosan and Foliar Melatonin on Growth, Photosynthesis, and Heavy Metals Accumulation in Wheat Growing on Wastewater Polluted Soil

Sustainable Production of Tomato Plants (Solanum lycopersicum L.) under Low-Quality Irrigation Water as Affected by Bio-Nanofertilizers of Selenium and Copper

Farmers’ Attitudes towards Irrigating Crops with Reclaimed Water in the Framework of a Circular Economy

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