Heavy metal accumulation and changes in soil enzymes activities and bacterial functional diversity under long-term treated wastewater irrigation in East Central region of Tunisia (Monastir governorate)

Mkhinini, Marouane; Boughattas, Iteb; Alphonse, Vanessa; Livet, Alexandre; Gıusti-Miller, Stéphanie; Bannı, Mohamed; Bousserrhıne, Noureddine

doi:10.1016/j.agwat.2020.106150

Cited by 25 publications

(13 citation statements)

References 83 publications

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“…The results indicate that due to the continuous availability of macro-and trace-elements due to the application of TWW, crops attained higher growth, leaf area, height (Table 4), and, finally, total biomass. Previous studies have shown that TWW increases the microbial biomass, soil organic matter (OM), water holding capacity of soil (WHC), and porosity, favoring plant growth and increasing biomass [18,45,57,72,73]. Similarly, Abd-Elwahed [57] documented that the OM of soil increases after TWW irrigation, which also increases the WHC of soil and the soil porosity and helps plants attain nutrients and higher economic yields [18,45,72,73].…”

Section: Discussionmentioning

confidence: 96%

Integrative Effects of Treated Wastewater and Synthetic Fertilizers on Productivity, Energy Characteristics, and Elements Uptake of Potential Energy Crops in an Arid Agro-Ecosystem

et al. 2021

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Using wastewater in agriculture is a desirable alternative source of irrigation and is gaining attraction worldwide. Therefore, this study was designed to assess the effect of treated municipal wastewater (TWW) and groundwater (GW), along with half and full doses of the recommended NPK dose on the plant growth, total biomass, gross energy, and macro- and trace element content and uptake of safflower (Carthamus tinctorius L.), canola (Brassica napus L.), and triticale (X Triticosecale Wittmack) grown in old and virgin soil as potential bioenergy crops. The results showed that crops planted in old or virgin soil irrigated with TWW had higher values of plant height, leaf area per plant, total chlorophyll content, total biomass, and gross and net energy contents compared to those irrigated with GW grown in virgin soil. Similarly, crops grown in old soil irrigated with TWW showed higher concentrations in dry matter and uptake for both macronutrients (N, P, and K) and trace elements (B, Zn, Mn, Cu, Cd, Pb, and Ni) compared to those planted in virgin soil and irrigated with GW. Furthermore, the application of the recommended half dose of NPK in old and virgin soil irrigated with TWW showed occasionally comparable results to that of a full recommended dose of NPK for most of the measured parameters. Importantly, the recommended half dose applied to old soil irrigated with TWW resulted in a significant improvement in all measured parameters compared to virgin soil irrigated with GW, along with a full recommended dose of NPK. Briefly, TWW can be used to irrigate crops grown for bioenergy purposes, since it did not pose any harmful effect for energy crops. In addition, it provides additional nutrients to soil and thus decreases the required rate of synthetic fertilizer by up to 50% without any significant decreases in the final production of crops.

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Section: Discussionmentioning

confidence: 96%

Integrative Effects of Treated Wastewater and Synthetic Fertilizers on Productivity, Energy Characteristics, and Elements Uptake of Potential Energy Crops in an Arid Agro-Ecosystem

et al. 2021

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“…The global water supply is decreasing due to population growth and climate change, thus, wastewater becomes the cheapest source of water for irrigation worldwide (Christou et al, 2016;Mkhinini et al, 2020). The practice of wastewater irrigation is more common in developing countries where water scarcity is more severe (Nzediegwu et al, 2019).…”

Section: Waste Water Irrigationmentioning

confidence: 99%

“…Christou et al (2016) also reported traces of Zn, Ni, Cu, and Co in strawberry fruits irrigated with treated wastewater. Continuous irrigation with treated wastewater stock up the soil with more HMs (Mkhinini et al, 2020;Rezapour et al, 2019;Sedlacko et al, 2020). As the concentration of these metals is growing continuously in the earth's crust (Sun et al, 2019), balanced composition and concentration of these metals are created within the crust regardless of depth (Zhu et al, 2020).…”

Section: Waste Water Irrigationmentioning

confidence: 99%

“…Depending on its source, wastewater can supply crops with certain essential nutrients (Kumar et al, 2019), microorganisms, and enzymes (Ahmad et al, 2020). Mkhinini et al (2020) claimed that the application of treated wastewater to agricultural soil increases the activities of soil microorganisms. Important nutrients such as nitrogen and phosphorous and rich organic matter can be harvested from the treatment of domestic wastewater (Wielemaker et al, 2018).…”

Section: Waste Water Irrigationmentioning

confidence: 99%

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Heavy Metals in Food Crops: Ideal Sources and Roles of Urban Agriculture in Facilitating Their Consumption- A Review

Abdullahi¹,

Igwe²,

Dandago³

et al. 2021

FJS

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The qualities of agricultural soil and water are diminishing continuously due to the rigorous anthropogenic activities currently stocking the soil with a lot of toxic chemicals including heavy metals. Heavy metals are highly persistent and non-biodegradable, control of their contamination is very tricky to handle. Their presence in soil and water is detrimental to food crops and humans. Various sources of heavy metals contaminants and the role of urban food production on human heavy metal contamination were discussed.Heavy metals have their way into the soil and food crops through wastewater irrigation and production in contaminated soil. The habitual heavy metals contamination sources for food crops are wastewater irrigation, abuse of agrochemicals, production in the contaminated field, atmospheric deposit when foods are exposed to contaminated air, and unethical mining activities. Agricultural soil in urban and peri-urban areas are heavily contaminated with heavy metal due to various anthropogenic activities. Wastewater irrigation intensify the contamination by supplying the soil with more heavy metals. The heavy metals are passed to food during production and subsequently to humans after consumption.

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“…Some plant species are able to grow in contaminated soils with elevated metal concentrations through hyperaccumulation processes [25]. Accumulated trace elements can significantly change soil enzymes, increase microorganism metabolic activities, and threaten bacterial functional diversity [26]. All metals in crops should be lower than the allowable concentration limits to reduce human health risks [27,28].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Capsicum annuum L. Grown in Controlled and Semi-Controlled Environments Irrigated with Greywater Treated by Floating Wetland Systems

et al. 2021

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Accumulation of trace elements, including heavy metals, were evaluated in soil and fruits of chilli plants (Capsicum annuum L.) grown under both laboratory-controlled and semi-controlled greenhouse location conditions. Chilli plant biomass growth in different development stages and fruit productivity were evaluated and compared with each other for the impact of growth boundary conditions and water quality effects. Treated synthetic greywaters by different operational design set-ups of floating treatment wetland systems were recycled for watering chillies in both locations. Effluents of each individual group of treatment set-up systems were labelled to feed sets of three replicates of chilli plants in both locations. Results revealed that the treated synthetic greywater (SGW) complied with thresholds for irrigation water, except for high concentrations (HC) of phosphates, total suspended soils, and some trace elements, such as cadmium. Chilli plants grew in both locations with different growth patterns in each development stage. First blooming and high counts of flowers were observed in the laboratory. Higher fruit production was noted for greenhouse plants: 2266 chilli fruits with a total weight of 16.824 kg with an expected market value of GBP 176.22 compared to 858 chilli fruits from the laboratory with a weight of 3.869 kg and an estimated price of GBP 17.61. However, trace element concentrations were detected in chilli fruits with the ranking order of occurrence as: Mg > Ca > Na > Fe > Zn > Al > Mn > Cu > Cd > Cr > Ni > B. The highest concentrations of accumulated Cd (3.82 mg/kg), Cu (0.56 mg/kg), and Na (0.56 mg/kg) were recorded in chilli fruits from the laboratory, while greater accumulations of Ca, Cd, Cu, Mn, and Ni with concentrations of 4.73, 1.30, 0.20, 0.21, and 0.24 mg/kg, respectively, were linked to fruits from the greenhouse. Trace elements in chilli plant soils followed the trend: Mg > Fe > Al > Cr > Mn > Cd > Cu > B. The accumulated concentrations in either chilli fruits or the soil were above the maximum permissible thresholds, indicating the need for water quality improvements.

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Heavy metal accumulation and changes in soil enzymes activities and bacterial functional diversity under long-term treated wastewater irrigation in East Central region of Tunisia (Monastir governorate)

Cited by 25 publications

References 83 publications

Integrative Effects of Treated Wastewater and Synthetic Fertilizers on Productivity, Energy Characteristics, and Elements Uptake of Potential Energy Crops in an Arid Agro-Ecosystem

Integrative Effects of Treated Wastewater and Synthetic Fertilizers on Productivity, Energy Characteristics, and Elements Uptake of Potential Energy Crops in an Arid Agro-Ecosystem

Heavy Metals in Food Crops: Ideal Sources and Roles of Urban Agriculture in Facilitating Their Consumption- A Review

Assessment of Capsicum annuum L. Grown in Controlled and Semi-Controlled Environments Irrigated with Greywater Treated by Floating Wetland Systems

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