An integrated analysis on source-exposure risk of heavy metals in agricultural soils near intense electronic waste recycling activities

Yang, Shiyan; He, Mengting; Zhi, Yuyou; Chang, Scott X.; Gu, Baojing; Liu, Xingmei; Xu, Jianming

doi:10.1016/j.envint.2019.105239

Cited by 142 publications

(49 citation statements)

References 56 publications

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“…Moreover, farmland often surrounds vanadium smelters (Xiao et al, 2017). Given that food security and human health are directly affected by the quality of farmland soil (Rowell et al, 1998;Guan et al, 2019;Yang et al, 2019), pollution of such soil by nearby vanadium smelters is a subject of growing concern (Wang et al, 2018a;Shaheen et al, 2019). However, information is lacking on the vanadium content of farmland soil near vanadium smelters at continental scale, and the associated health risks.…”

Section: Introductionmentioning

confidence: 99%

Vanadium contamination and associated health risk of farmland soil near smelters throughout China

Zhang

Liu

et al. 2020

Environmental Pollution

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Whereas there is broad consensus that smelting causes serious soil contamination during vanadium production, little is known about the vanadium content of soil near smelters and the associated health risk at continental scale. This study is the first to map the distribution of vanadium in farmland soil surrounding smelters throughout mainland China, and assess the associated health risk. Analysis of 76 samples indicated that the average vanadium content in such soil was 115.5 mg/kg -far higher than the 82 mg/kg background content in China (p < 0.05). Southwest China (198.0 mg/kg) and North China (158.3 mg/kg) possessed highest vanadium contents.Vanadium content was strongly related to longitude, altitude, and atmospheric temperature. The reducible fraction accounted for the largest percentages in vanadium speciation. The average Pollution Load Index for all samples was 1.51, denoting significant metal enrichment. The Children's hazard index was higher than unity, indicating elevated health risk. The relative contribution of vanadium to the total health risk ranged from 6.02% to 34.5%, while nickel and chromium were the two main contributors in most regions. This work may serve as a model providing an overview of continental vanadium contamination around smelters, and draw attention to their possible health risks.

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Section: Introductionmentioning

confidence: 99%

Vanadium contamination and associated health risk of farmland soil near smelters throughout China

Zhang

Liu

et al. 2020

Environmental Pollution

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“…It was generally acknowledged that traffic emission was the dominant source of Pb, Cu, and Zn in roadway dust [1,52,55]. Except for traffic emission, fertilizers and agrochemicals applied in agricultural activities were also suggested to be one source of trace metals in road dust [56,57]. In our study, TOC was measured and significant correlations were observed between TOC and Cu (R = 0.49, α = 0.05) and TOC and Zn (R= 0.72, α = 0.05).…”

Section: Source Identificationmentioning

confidence: 99%

Contamination Identification of Trace Metals in Roadway Dust of a Typical Mountainous County in the Three Gorges Reservoir Region, China, and its Relationships with Socio-Economic Factors

Pan

Lei

2020

Sustainability

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Trace metal contamination in urban road dust has attracted global concern due to its potential risk to the urban environment and human health. Compared to big cities, relative studies in counties and small towns have not been well quantified. This research identified the trace metal contamination characteristics and possible sources in the road dust of a typical mountainous county and a town in the Three Gorges Reservoir region, southwest China, and their associations with major regional socio-economic factors. The trace metal concentrations were determined, and the contamination levels were assessed. Concentrations of Zn, Pb, and Cu were relatively high in both locations, and a significant accumulation of them was confirmed by the geo-accumulation method. Multivariate analysis and geographic information system (GIS) mapping were combined to explore the sources of trace metals in the investigated area. Anthropogenic activities predominantly affected the contamination levels of Zn, Pb, Cu, and Co, and traffic emission, agricultural activities, and fossil fuel combustion were their main sources. The significant accumulation of Zn should attract special concern for its wide use in industrial and agricultural activities. Population and vehicle density were the main factors that controlled the trace metal contamination levels in the roadway dust. Rapid urbanizing promoted trace metal accumulation in counties and towns. Therefore, it is urgent to make appropriate strategies for trace metal pollution mitigation in the process of urbanization.

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“…Rapid urbanization and anthropogenic activities have been caused environmental deterioration and become major constraint to crop production due to higher accumulation of heavy metal in soil (Yang et al 2019). Cr is non-essential toxic metal and its availability aggravated pollutant to agricultural soil and water which possess severe human health risks through its involvement to food chain (Ulhassan et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Exogenous melatonin regulates chromium stress induced feedback inhibition of photosynthesis and antioxidative protection in Brassica napus cultivars

Ayyaz

Farooq

Zafar

et al. 2021

Preprint

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Developing heavy metal chromium (Cr) tolerant cultivars is mainly constrained due to poor knowledge of the mechanism behind Cr stress tolerance. In the present study, available germplasm of Brassica napus (canola) was screened out for Cr stress tolerance using Dual-PAM-100 and biochemical attributes and used to selected one Cr stress tolerant (Ac-Excel) and one sensitive (DGL) under melatonin (MT) treatments for further studies. Plant oxidative enzymes and PSII activity were found to be key physiological discriminating factors. Changes in PSII and PSI efficiency, oxidative damage, higher proline content and antioxidants were further evaluated in selected Cr tolerant and sensitive cultivars. Cr stress reduced PSII efficacy and ETC in both canola cultivars. MT application increased NPQ and Y(NPQ), higher increase in NPQ and Y(NPQ) were observed in Cr stress tolerant cv AC-Excel, indicating that the MT treated tolerant cultivar have higher excitation of PSII by more heat dissipation via photo-protective component of NPQ under Cr stress. Reduced PSI efficiency and increased donor end limitation of PSI in both canola cultivars further confirmed the downregulation of electron transport from PSII. However, Cr stress sensitive cv DGL had poor efficacy to manage over-excitation of PSII via buildup of Y(NPQ) through increased oxidative stress. Tolerant cultivar exhibited higher proline content and antioxidant enzymes activity than Cr sensitive cultivar. Overall, MT induced tolerance in canola cultivars can be related to PSII activity, Y(NPQ), and antioxidants potential which can be effectively used for canola cultivars selection under Cr stress.

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An integrated analysis on source-exposure risk of heavy metals in agricultural soils near intense electronic waste recycling activities

Cited by 142 publications

References 56 publications

Vanadium contamination and associated health risk of farmland soil near smelters throughout China

Vanadium contamination and associated health risk of farmland soil near smelters throughout China

Contamination Identification of Trace Metals in Roadway Dust of a Typical Mountainous County in the Three Gorges Reservoir Region, China, and its Relationships with Socio-Economic Factors

Exogenous melatonin regulates chromium stress induced feedback inhibition of photosynthesis and antioxidative protection in Brassica napus cultivars

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