Geochemistry and genotoxicity of the heavy metals in mine-abandoned areas and wasteland in the Hetai goldfields, Guangdong Province, China

Li, Miao; Ma, Yuanyuan; Xu, Ruifeng; Yan, Wen

doi:10.1007/s12665-011-1176-8

Cited by 9 publications

(3 citation statements)

References 30 publications

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“…For example, As, Cr, Hg, Pb, and Cd concentrations must be under 10, 50, 1, 10, and 3 µg·L −1 , respectively [1]. Such low values need to be determined by means of highly sensitive techniques, such as flameless atomic adsorption spectrophotometry (FAAS) [2], inductively coupled plasma optical emission spectroscopy (ICP-OES) [3], and inductively coupled plasma mass spectrometry (ICP-MS) [4], among others; however, these require expensive equipment and specialized technicians. These facts increase both the analysis time and the operation costs.…”

Section: Introductionmentioning

confidence: 99%

Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Torres-Rivero

Torralba-Cadena

Espriu-Gascon

et al. 2019

Sensors

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Screen-printed carbon nanofiber electrodes (SPCNFEs) represent an alternative with great acceptance due to their results, as well as their low impact on the environment. In order to improve their performance, in the present work they were modified with silver nanoparticles (Ag-NPs) and electrochemically characterized by using anodic stripping voltammetry. From the Ag-NP synthesis, silver seeds (Ag-NS) and silver nanoprisms (Ag-NPr) were obtained. The Ag-NP formation was confirmed by micrographs, where Ag-NPs with diameters of 12.20 ± 0.04 nm for Ag-NS and 20.40 ± 0.09 nm for Ag-NPr were observed. The electrodes were modified by using three different deposition methods—drop-casting, spin-coating, and in situ approaches—that offer different nanoparticle distribution and electrode modification times. It was observed that the last methodology showed a low amount of Ag-NS deposited on the electrode surface and deep alteration of this surface. Those facts suggest that the in situ synthesis methodology was not appropriate for the determination of heavy metals, and it was discarded. The incorporation of the nanoparticles by spin-coating and drop-casting strategies showed different spatial distribution on the electrode surface, as proved by scanning electron microscopy. The electrodes modified by these strategies were evaluated for the cadmium(II) and lead(II) detection using differential pulse anodic stripping voltammetry, obtaining detection limit values of 2.1 and 2.8 µg·L−1, respectively. The overall results showed that the incorporation route does not directly change the electrocatalytic effect of the nanoparticles, but the shape of these nanoparticles (spherical for seeds and triangular for prisms) has preferential electrocatalytic enhancement over Cd(II) or Pb(II).

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Section: Introductionmentioning

confidence: 99%

Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Torres-Rivero

Torralba-Cadena

Espriu-Gascon

et al. 2019

Sensors

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“…Mining and smelting processes discharge large quantities of heavy metals into the environment via wastewater, dust, tailings, and residues. Irrigation using polluted water [11], atmospheric deposition [12], and waste disposal [13,14] are main conduits that pollute soils with heavy metals. In the Jiangxi Province of China, many non-ferrous mines and smelters are scattered on both sides of the Jishui River, which is one of the tributaries of the Le'an River.…”

Section: Introductionmentioning

confidence: 99%

Vertical Distribution and Mobility of Heavy Metals in Agricultural Soils along Jishui River Affected by Mining in Jiangxi Province, China

Liu

Xue

et al. 2014

CLEAN Soil Air Water

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The vertical distribution of Cd, Cr, Cu, Pb, and Zn and their mobility (except Cr) were investigated in ten agricultural soil cores, collected near non-ferrous metal mines and smelters along Jishui River, in Jiangxi Province, China. The surface soils near mines and smelters were contaminated by Cd, Cu, Pb, and Zn, with concentrations higher than the guideline values of China. For most polluted sites, heavy metals were mainly retained in the surface soil (0-20 cm), and the contents of them became constant in deeper soil. In all soil cores, the mean content of Cr was lower than the guideline value of China. Correlation results between studied heavy metals and soil properties showed that heavy metal contents throughout the soil profile was mostly influenced by organic matter (OM), pH, and clay content. Particularly soil OM can significantly impact on transport of soil heavy metals. There were positive correlations of OM content with all studied heavy metals, and the correlations with Cr, Cu, Pb, and Zn were significant or very significant. Heavy metal mobility in the studied region were assessed using a mobility index (MI) and mobility order was Cd ) Pb > Cu % Zn.

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“…Natural and anthropogenic sources are responsible for the heavy metal accumulation in soil [10][11][12]. The natural source indicates that the trace metal concentration is derived from parent rocks, and the anthropogenic source indicates that the trace metal concentration originates from mining activities, metal smelting, mineral fertilizer, waste water irrigation, and exhaust emissions [13][14]. In a contaminated farmland, heavy metal pollution often affects a wide of area, but the level of pollution is sufficiently low so that crops could still grow.…”

Section: Introductionmentioning

confidence: 99%

Toxic heavy metal contamination assessment and speciation in sugarcane soil

Wang

Deng

Yin

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. The increasing heavy metal pollution in the sugarcane soils along the Great Huanjiang River was caused by leakage and spills of Lead (Pb) and Zinc (Zn) tailing dams during a flood event. Copper (Cu), Zn, Pb, Cadmium (Cd), and Arsenic (As) concentrations of soil samples collected from 16 different sites along the Great Huanjiang River coast typical pollution area were analyzed by Inductive Coupled Plasma Mass Spectrometry (ICP-MS). The mean concentrations of Pb, Cd, Zn, Cu, and As in the sugarcane soils were 151.57 mg/kg, 0.33 mg/kg, 155.52 mg/kg, 14.19 mg/kg, and 18.74 mg/kg, respectively. Results from the analysis of heavy metal speciation distribution showed that Cu, Zn, Pb, and Cd existed in weak acid, reducible, and oxidizable fractions, and the sum of these fractions accounted for significant proportions in sugarcane soils. However, the residual fraction of As with high proportion of reducible fraction indicated that this trace element still poses some environmental risk in the sugarcane soils because of its high content. Assessments of pollution levels revealed that the highest environmental risk was arouse by Pb. In addition, moderate to strong Cd and Zn pollution were found, while As has zero to medium level of pollution and Cu has zero level.

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Geochemistry and genotoxicity of the heavy metals in mine-abandoned areas and wasteland in the Hetai goldfields, Guangdong Province, China

Cited by 9 publications

References 30 publications

Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Vertical Distribution and Mobility of Heavy Metals in Agricultural Soils along Jishui River Affected by Mining in Jiangxi Province, China

Toxic heavy metal contamination assessment and speciation in sugarcane soil

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