The effect of long-term wastewater irrigation on accumulation and transfer of heavy metals in Cupressus sempervirens leaves and adjacent soils

Farahat, Emad A.; Linderholm, Hans W.

doi:10.1016/j.scitotenv.2015.01.032

Cited by 106 publications

(31 citation statements)

References 33 publications

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“…BCF is among the most important indicators of heavy metal absorption in plants. It is expressed as the ratio between the heavy metal concentrations in aquatic plant tissues to the concentration in water, whereby a BCF > 1 is indicative of heavy metal accumulation in plants [25]. The Pb BCF in E. crassipes roots in 60 mg/L Ca 2+ karst water (30,306) was higher than that in non-karst water with 20 mg/L Ca 2+ (21,583), which was consistent with the Pb removal rate in water.…”

Section: Effect Of Ca 2+ Concentration On Pb Absorption In E Crassipessupporting

confidence: 55%

Effects and Mechanisms of Calcium Ion Addition on Lead Removal from Water by Eichhornia crassipes

Zhou

Jiang

Qin

et al. 2020

IJERPH

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Karst water is rich in calcium ions (Ca 2+ ) and exhibits poor metal availability and low biodegradation efficiency. This study sought to analyze the effects and mechanisms of Ca 2+ on lead (Pb) removal and absorption by Eichhornia crassipes (a floating plant common in karst areas). Moreover, the morphology and functional groups of E. crassipes in water were characterized via SEM, and FTIR. The results demonstrated that the removal rate of Pb in karst water (85.31%) was higher than that in non-karst water (77.04%); however, the Pb bioconcentration amount (BCA) in E. crassipes roots in karst water (1763 mg/kg) was lower than that in non-karst water (2143 mg/kg). With increased Ca 2+ concentrations (60, 80, and 100 mg/L) in karst water, the Pb removal rate increased (85.31%, 88.87%, and 92.44%), the Pb BCA decreased (1763, 1317, and 1095 mg/kg), and the Ca BCA increased (6801, 6955, and 9368 mg/kg), which was attributed to PbCO 3 and PbSO 4 precipitation and competitive Ca and Pb absorption. High Ca 2+ concentrations increased the strength of cation exchange, alleviated the fracture degree of fibrous roots, reduced the atrophy of vascular bundles, protected the cell wall, promoted C-O combined with Pb, enhanced the strength of O-H, SO 4 2− , C=O, and reduced the oxidization of alkynyl acetylene bonds.industrial wastewater discharged by the lead smelting industry. Pb remains and accumulates in the food chain after entering the environment, which causes serious toxicity to organisms. Moreover, Pb affects plant photosynthesis and transpiration capacity [5,6]; therefore, Pb remediation has become the focus of many studies worldwide. Eichhornia crassipes is an aquatic floating plant that is widely distributed all over the world and occurs in large quantities in karst areas in China. E. crassipes has broad, thick, glossy, ovate leaves and stems, which are important for photosynthesis, food production, gas exchange, and water transpiration [7]. This plant is known to adapt to a wide variety of environmental conditions and even grows well in sewage water. Importantly, E. crassipes possesses a high heavy metal tolerance and uptake efficiency and has therefore become popular for water phytoremediation [8]. E. crassipes can reproduce quickly and absorb various pollutants [9]. Suryandari et al.[10] also demonstrated Pb removal efficiencies of up to 99.71% in E. crassipes harvested after nine days.Calcium (Ca) is an essential element for plants; it is an important regulator of plant growth and supports the structure and stability of cell walls, membranes, and membrane-binding proteins. Ca is also a second messenger that regulates the response of plants to environmental changes [11]. Moreover, certain Ca 2+ concentrations could promote growth and development, metabolism, cell structure, and adaptability to heavy metal stress [12][13][14]. Ca 2+ could also inhibit the transport of heavy metals from underground to aboveground plant structures [15]. Increased Ca 2+ concentrations could reduce heavy metal solubility [16] and allevia...

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Section: Effect Of Ca 2+ Concentration On Pb Absorption In E Crassipessupporting

confidence: 55%

Effects and Mechanisms of Calcium Ion Addition on Lead Removal from Water by Eichhornia crassipes

Zhou

Jiang

Qin

et al. 2020

IJERPH

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“…Such seepage water, or so-called "groundwater," is the only source for daily domestic use, including cooking, for the farmers who live there (12) . The use of treated wastewater in irrigation could have several effects as heavy metals accumulation in soil leading to nutrient disorders in plants and thus desertification (47) . In addition, groundwater pollution resulting from infiltration of contaminated water source, may pose a problem.…”

Section: Domestic Wastewatermentioning

confidence: 99%

Groundwater in Egypt Issue: Resources, Location, Amount, Contamination, Protection, Renewal, Future Overview

2016

Egypt. J. Chem.

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HE PRESENT review is concerning with the groundwater issue in Egypt. Groundwater is one of the most important resources of water in Egypt. It ranks as the second source after the Nile River. In addition, there are different groundwater aquifers with variable importance for exploitation in the Nile river region. They are ranging from shallow local aquifers, recharged by rainfall, to deep nonreplenishable aquifers. The first comprises groundwater in the Nile Valley and Delta system. The second aquifer category is the nonrenewable type, which is located in the "Western Desert-Nubian Sandstone Aquifer". Non-renewable groundwater exploitation is estimated at a rate of 1.65 Billion m 3 /year (BCM/year). It is mainly concentrated at the Western Desert Oases with 0.5 BCM/yr. On the other side, the amount of groundwater abstractions in Delta, Sinai and New Valley are about 5.1 BCM/yr. It is estimated that about 200,000 BCM of fresh water are stored in the New Valley's Oasis aquifer only. The water is at the depth of 60-100 m around the area of East-Oweinat. In Sinai, groundwater is mainly encountered in three different waterbearing aquifers. Further information concerning groundwater issue in Egypt, locations, origin, amount, quality and quantities, contamination, natural aquifer treatment, protection, uses, future overview and conclusion are included and discussed in details in this review.

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“…However, the use of wastewater in irrigation may present risks that need to be observed, such as soil salinization and sodification (Bedbabis et al, 2015), nutrient excess (Kalavrouziotis et al, 2008), and contamination by microorganisms (Bernstein, 2011;Obayomi et al, 2019), heavy metals (Meng et al, 2016;Farahat;Linderholm, 2015) and pharmaceuticals and personal care products (PPCPs) (Thelusmond;Strathmann;Cupples, 2019). These risks may negatively affect human health, the environment and agricultural production.…”

Section: Introductionmentioning

confidence: 99%

Millet irrigation with treated wastewater: Gas exchange response and nutrient accumulation

et al. 2019

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Wastewater can be considered an excellent nutritional and water source for cultivated plants. However, the presence of high concentrations of salts and toxic compounds can negatively affect crops. The effect of irrigation with different concentrations of treated wastewater on the accumulation of nutrients and gas exchange aspects of millet (Pennisetum glaucum (L.) R. Br.) grown in clay soil and sandy loam soil was analyzed. This study was conducted in a greenhouse (16°40’57,50” S; 43°50’26,07” O; 650 m) in a 5 x 2 factorial design, consisting of five levels of concentration of treated wastewater (0, 25, 50, 75, and 100%), combined with two types of soil (clay and sandy loam). The experiment was designed in randomized blocks with four replicates. The increase in treated wastewater concentration in irrigation water applied to clay soil and sandy loam soil favored the increase of net photosynthesis, transpiration rate, stomatal conductance, leaf chlorophyll content and accumulation of macro- and micronutrients in millet plants. Millet plants grown in clay soil showed an average increase of 23% in gas exchange capacity and 71% in accumulation of macro- and micronutrients, when compared with treatments in sandy loam soil. Therefore, treated wastewater contributes to the increase in gas exchange capacity and greater accumulation of nutrients in millet plants, which represents an alternative for reduced demand for fresh water and use of chemical fertilizers.

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The effect of long-term wastewater irrigation on accumulation and transfer of heavy metals in Cupressus sempervirens leaves and adjacent soils

Cited by 106 publications

References 33 publications

Effects and Mechanisms of Calcium Ion Addition on Lead Removal from Water by Eichhornia crassipes

Effects and Mechanisms of Calcium Ion Addition on Lead Removal from Water by Eichhornia crassipes

Groundwater in Egypt Issue: Resources, Location, Amount, Contamination, Protection, Renewal, Future Overview

Millet irrigation with treated wastewater: Gas exchange response and nutrient accumulation

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