Multiscale analysis of the spatial variability of heavy metals and organic matter in soils and groundwater across Spain

Luque-Espinar, Juan Antonio; Pardo‐Igúzquiza, Eulogio; Grima­-Olmedo, Juan; Grima-Olmedo, Carlos

doi:10.1016/j.jhydrol.2018.04.013

Cited by 21 publications

(7 citation statements)

References 29 publications

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“…This indicates that heavy metals originate from different parent material (rock). The parent material (rock) was the main influencing factor for the accumulation of heavy metals in large-scale soils [ 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ]. Most of the parent materials in Guizhou Province were limestone and sand shale.…”

Section: Resultsmentioning

confidence: 99%

Heavy Metal Bioaccumulation in Rice from a High Geological Background Area in Guizhou Province, China

Kong

Liu

et al. 2018

IJERPH

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Long-term exposure to high levels of heavy metals can lead to a variety of diseases. In recent years, researchers have paid more attention to mining and smelting areas, industrial areas, and so forth, but they have neglected to report on high geological background areas where heavy metal levels are higher than China’s soil environmental quality standard (GB 15618-2018). In our study, an investigation of heavy metals in paddy soil and rice in the high background area of Guizhou Province was carried out, and the factors affecting the absorption and utilization of heavy metals in rice were discussed. A total of 52 paddy soil and rice samples throughout the high geological background of Guizhou, China, were collected, and concentration(s) of arsenic, cadmium, copper, lead, and zinc were analyzed. The arithmetic mean values of paddy soil heavy metals were 19.7 ± 17.1, 0.577 ± 0.690, 40.5 ± 32.8, 35.5 ± 32.0, and 135 ± 128 mg kg−1 for arsenic, cadmium, copper, lead, and zinc, respectively. Most of the heavy metals’ contents in the soil were above the soil standard value. The highest content of cadmium was 15.5 times that of the soil standard value. The concentration(s) of arsenic, cadmium, copper, lead, and zinc in rice were 0.09 ± 0.03, 0.01 ± 0.01, 1.57 ± 0.69, 0.002 ± 0.003, and 11.56 ± 2.61 mg kg−1, respectively, which are all lower than those specified by Chinese food safety standards (GB 2762-2017). The results and discussion show that the bioavailability, pH, and soil organic matter are important factors that affect the absorption of heavy metals by rice. According to the consumption of rice in Guizhou Province, the risk of eating rice was considered. The results revealed that the hazard quotient is ranked in the order of copper > zinc > cadmium > arsenic > lead, and there is little risk of eating rice in the high geological background area of Guizhou Province. These findings provide impetus for the revision and improvement of this Chinese soil environmental quality standard.

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Section: Resultsmentioning

confidence: 99%

Heavy Metal Bioaccumulation in Rice from a High Geological Background Area in Guizhou Province, China

Kong

Liu

et al. 2018

IJERPH

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“…1 Absorption by crops is the predominant pathway for these contaminants entering the food chain, particularly by vegetables. 2 Elevated concentrations of heavy metals in farmland are often not caused by pedogenesis but by human activities, 3 such as mining and smelting, combustion of fossil fuels, application of agrochemicals, and wastewater irrigation. 4 It is crucial to ascertain and quantify the sources of heavy metals in farmland for designing pollution controls and remediation strategies.…”

Section: ■ Introductionmentioning

confidence: 99%

Source Contribution Analysis and Collaborative Assessment of Heavy Metals in Vegetable-Growing Soils

Gan

Miao

Wang

et al. 2018

J. Agric. Food Chem.

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Source quantification of heavy metals in farmland is essential for developing and implementing restoration strategies. We used various data analyses to identify and quantify sources of arsenic, cadmium, chromium, copper, mercury, nickel, lead, and zinc in vegetable-growing soils. A new method of collaborative assessment, combining soil environmental quality and agricultural product safety, showed that approximately 5.20% of cultivation systems were multi-contaminated by heavy metals. The nonlinear relationship between pollution sources and the comprehensive contamination situation was established, deriving from a fitted bivariate model. The model revealed that anthropogenic sources and natural origins accounted for 65.8−86.0 and 34.2−14.0% of the comprehensive pollution, respectively. These results suggested that both human activities and natural factors contributed to the decline of local soil quality and the influence of the former was more substantial than that of the latter.

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“…As a result of the bioaccumulative, toxic, and carcinogenic properties of the substance, the WHO lowered the limit for the amount of As that may be present in drinking water from 50 mg L − to 10 g L −1 [56]. There is a possibility that the Duero Basin in Spain has arsenic concentrations that are as high as 10 mg L −1 [57]. Due to the presence of hazardous levels of arsenic in the drinking water in several Spanish villages in the Duero Basin in recent years, the water supply has been cut off to those areas.…”

Section: Photocatalytical Oxidation Of Arsenic(iii) To Arsenic(v)mentioning

confidence: 99%

Removal of Toxic Metals from Water by Nanocomposites through Advanced Remediation Processes and Photocatalytic Oxidation

et al. 2023

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Purpose of Review Heavy and toxic metals are becoming more prevalent in the water sources of the globe, which has detrimental repercussions for both human health and the health of ecosystems. The summary of recent findings on treatment possibilities of toxic metal species by nanomaterials should facilitate the development of more advanced techniques of their removal. Recent Findings The high concentrations of chromium, mercury, and arsenic identified in wastewater cause a hazard to human health. There is a wide variety of nanoadsorbents and nanophotocatalysts used for heavy/hazardous metal removal. Recent research has resulted in the production of advanced nanostructures that exhibit extraordinary heavy/hazardous metal adsorption effectiveness and photocatalytic diminution of metal ions. These nanostructures have physically and chemically tunable features. Summary In this review article, the use of carbon-based nanomaterials, polymer-based nanomaterials, and semiconductor-based nanomaterials are extensively discussed to remove mercury, chromium, and arsenic ions from wastewater by the adsorption process. Advanced nanomaterials involved in photocatalytic reduction are also comprehensively discussed.

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Multiscale analysis of the spatial variability of heavy metals and organic matter in soils and groundwater across Spain

Cited by 21 publications

References 29 publications

Heavy Metal Bioaccumulation in Rice from a High Geological Background Area in Guizhou Province, China

Heavy Metal Bioaccumulation in Rice from a High Geological Background Area in Guizhou Province, China

Source Contribution Analysis and Collaborative Assessment of Heavy Metals in Vegetable-Growing Soils

Removal of Toxic Metals from Water by Nanocomposites through Advanced Remediation Processes and Photocatalytic Oxidation

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