Fractionation and mobility risks of heavy metals and metalloids in wastewater-irrigated agricultural soils from greenhouses and fields in Gansu, China

Cao, Chun; Zhang, Qiang; Ma, Zhixin; Wang, Xuemei; Chen, Huan; Wang, Junjian

doi:10.1016/j.geoderma.2018.05.001

Cited by 76 publications

(23 citation statements)

References 64 publications

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“…This is likely duo the generally higher soil organic matter content in southern China [43]. This fraction distribution pattern is consistent with the results in other literatures [20,44], indicating a lower health risk due to soil Cu contamination in China.…”

Section: Fraction Distribution Of CD and Cu In Chinese Soilssupporting

confidence: 91%

“…Secondly, fractions more strongly bound to minerals and organic matter, are usually less available to plants. However, these fractions could be mobilized into available forms due to a change in environmental conditions, and therefore are considered as potentially available [18][19][20][21]. For example, studies reported that PTMs bound to carbonates were released to solution during soil acidification (i.e., soil pH decline) [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Distribution of Cd and Cu Fractions in Chinese Soils and Their Relationships with Soil pH: A Meta-Analysis

Ning

Zhang

et al. 2019

Sustainability

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Soil contamination by potentially toxic metals (PTMs) has become a public concern in China. However, the distribution and controlling factors of soil PTM fractions remain largely unknown, limiting our ability to assess their health risks and thus to make sound controlling polices. Here, we investigate the fraction distribution of cadmium (Cd) and copper (Cu) in Chinese soils and their relationships with soil pH, based on a national meta-analysis of 163 published literatures. Exchangeable Cd in southern China accounted for 19.50 ± 14.97% of total Cd, significantly (p < 0.01) higher than the corresponding 13.42 ± 6.95% in northern China. Potentially available fractions constituted about 60% of total Cd at the national scale. By contrast, about half of soil Cu existed in unavailable residual fraction. Phytoavailable (i.e., exchangeable) fraction accounted for only 2.71 ± 1.65% and 2.54 ± 1.58% of total Cu in northern and southern China, respectively. Percentages of exchangeable Cd and Cu were negatively correlated (p < 0.01) with soil pH, while potentially available fractions increased significantly (p < 0.05) with soil pH. Our results provide the first national assessment of Cd and Cu fraction distribution and their responses to soil pH variations, highlighting the necessity to consider their fraction distribution and soil properties when assessing the health risks of soil PTM contamination in China.

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Section: Fraction Distribution Of CD and Cu In Chinese Soilssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Distribution of Cd and Cu Fractions in Chinese Soils and Their Relationships with Soil pH: A Meta-Analysis

Ning

Zhang

et al. 2019

Sustainability

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“…When the capacity of the soil to retain heavy metal is reduced due to repeated use of waste water, soil can release heavy metals into ground water or soil solution available for uptake (Aghabarati et al, 2008). Also, (Cao, et al, 2018) found that the greenhouse soils had higher concentrations and percentages of metals (except Pb) in bio-accessible fractions compared with field soils.…”

Section: Introdutionmentioning

confidence: 90%

“…Wastewater irrigation reduces the pressure on freshwater usage but leads to the accumulation of heavy metals in soils (Cao, et al, 2018). Heavy metals are extremely persistent in the environment, they are nonbiodegradable and non-thermo-degradable and thus readily accumulate to toxic levels.…”

Section: Introdutionmentioning

confidence: 99%

Water Quality Assessment of Agricultural Drains for Irrigation in Northern Delta of Egypt

Khafagy

Khafagy²,

Abdelsatar³

et al. 2018

Journal of Soil Sciences and Agricultural Engineering

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The amount of water available to Egypt is limited and present water demands approaches that limit. For this reason, plans were suggested to re-use agricultural drainage water directly or often mixing with fresh water to extend the limited water supplies. The indiscriminate use of drainage water for irrigation as a result of freshwater shortage could impair soil functions and cause environmental pollution. This study aims to evaluate the suitability of wastewater from different sources, for irrigation purposes in the Northern Nile Delta of Egypt. Therefore, this study was carried out on three water drainage sources El-Gamalia , El-Serw and El-Harna drain with El-Shoka canal as a fresh water source as the control along a year starting from May 2016 to February 2018. The EC, SAR and the concentration of some macronutrients and some heavy elements in the water of all sources are evaluated. Water EC and SAR value increased slightly from upstream to downstream of all irrigation sources in the study area. The quality of study drainage water from drains belongs to C3 S1 and C4 S1 classes and could be re-use in irrigation purpose under special management, while the water from El-Shoka canal belongs to C2 S1 in the study area. Phosphorus concentration in sample water from El-Gamalia drain only was greater than 2 mg L-1 , which indicate this water can't be used for irrigation purpose. Also, Nitrate-N concentrations in water samples from El-Gamalia drain only was between 5-30 mg L-1 , therefore there is a slight to moderate degree of restriction when using this water in irrigation. While heavy metal ions concentration (Ni, Co and Cd) was greater than permissible levels at all selected water samples, except water samples from El-Shoka canal from a distance of 0 km to 4 km. While, Pb concentration was less than the critical limits (5 mg L-1). The conclusion from this study could be re-used of drainage water from drains of the northern delta of Egypt for irrigation purpose under special management.

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“…In the present study, the effectiveness of the biosurfactants for HM removal was analyzed based on the changes in the concentrations of HMs in the fractions. The fractions were grouped according to the BCR procedure, based on the availability of the HMs in that fraction: ready available (RA) comprises only the F1 fraction; potentially labile (PL) consists of the F2 and F3 fractions, whose mobility can increase when soil properties (pH, redox) change; and non-available (NA) comprises only the F4 fraction, in which HMs are strongly bound to the crystalline structures of minerals in soil matrices (Cao et al 2018).…”

Section: The Effect Of Single Washing With Biosurfactants On Hm Distrmentioning

confidence: 99%

Sequential soil washing with mixed biosurfactants is suitable for simultaneous removal of multi-metals from soils with different properties, pollution levels and ages

2019

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In this study, plant (SAP, TAN) and microbial (RAM) biosurfactants were applied to two soils, in single or sequential soil washing. Soil 1 was moderately acidic, with higher content of organic matter and HMs (Cd, Cu, Ni, Pb and Zn), and was aged for 24 months. Soil 2 was alkaline, with lower content of organic matter and HMs, and was aged for 1 month. The stability of the HMs (as I R), except for Pb, was higher in soil 1 than in soil 2, but the rankings of HM stability were similar: Cu > Ni ≈ Pb > Zn > Cd (soil 1) and Cu > Pb > Ni > Zn > Cd (soil 2). The HMs were removed more efficiently from soil 2 than from soil 1, mainly from the readily available fraction and partially from the reducible fraction. Cu (0.3-0.5 times), Ni (0.4-1.1 times) and Zn (0.5-1.0 times) showed the largest increases in stability after soil washing with SAP. With a single washing, SAP and TAN were the least effective for Pb removal (18-31% and 11-35%, respectively), while RAM was the most effective for Cd (69-73%) and Pb (58-63%) removal. Sequential soil washing, especially with SAP followed by RAM, was the best choice for simultaneous removal of multi-HMs.

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Fractionation and mobility risks of heavy metals and metalloids in wastewater-irrigated agricultural soils from greenhouses and fields in Gansu, China

Cited by 76 publications

References 64 publications

Distribution of Cd and Cu Fractions in Chinese Soils and Their Relationships with Soil pH: A Meta-Analysis

Distribution of Cd and Cu Fractions in Chinese Soils and Their Relationships with Soil pH: A Meta-Analysis

Water Quality Assessment of Agricultural Drains for Irrigation in Northern Delta of Egypt

Sequential soil washing with mixed biosurfactants is suitable for simultaneous removal of multi-metals from soils with different properties, pollution levels and ages

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