Spatial assessment of farmland soil pollution and its potential human health risks in China

Zeng, Siyan; Ma, Jing; Yang, Yongjun; Zhang, Shaoliang; Liu, Gangjun; Chen, Fu

doi:10.1016/j.scitotenv.2019.05.291

Cited by 176 publications

(61 citation statements)

References 63 publications

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“…Maliszewska-Kordybach [43] soil Σ 16 PAHs quality standards were used to classify the soils into four different pollution levels (clean corresponded to ≤200 µg/kg; slight, 200-600 µg/kg; moderate, 600-1000 µg/kg; and severe >1000 µg/kg). For sample data corresponding to the same type and collected in the same area, abnormal average concentration values in the range [x/4, 4x] were artificially removed [54]. These outliers are usually caused by anthropogenic activities, such as mining and industry, with great significance for small-scale research [55].…”

Section: Data Sources and Processingmentioning

confidence: 99%

Assessing the Spatial Distribution of Soil PAHs and their Relationship with Anthropogenic Activities at a National Scale

Zeng

Ren

et al. 2019

IJERPH

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Soil polycyclic aromatic hydrocarbon (PAH) pollution is a major concern due to its negative impact on soil quality around the world. In China, accurate data on soil PAHs and information on the relationship with anthropogenic activities are limited. In this study, about 30,800 samples from 1833 soil sample sites were reviewed from 306 published reports to build a soil PAHs database. Based on the data obtained, the results demonstrated that 24.11% of surface soils in China are heavily contaminated. Meanwhile, the concentration of soil PAHs varied, in the order of independent mining and industrial areas (IMIA) > urban areas > suburban areas > rural areas, and the spatial distribution in China demonstrated a descending trend from north to south. Moreover, the characteristic ratio and PCA-MLR (principal component analysis-multiple linear regression) analysis demonstrated that coal combustion and vehicular exhaust emissions were the main sources of soil PAH pollution in China. On the other hand, provincial total Σ16PAHs in surface soil were significantly correlated with the per square kilometer GDP (gross domestic product) of industrial land, the per capita GDP, as well as the production and consumption of energy. These results indicate that anthropogenic factors have greatly affected the levels of soil PAHs in China. This study improves our understanding on the status and sources of soil PAH contamination in China, thereby facilitating the implementation of strategies of prevention, control, and remediation of soils.

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Section: Data Sources and Processingmentioning

confidence: 99%

Assessing the Spatial Distribution of Soil PAHs and their Relationship with Anthropogenic Activities at a National Scale

Zeng

Ren

et al. 2019

IJERPH

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“…In 2014, the fraction of points that exceeded the standard quantity of Cd in cultivated land in China was 7% [4], and the area of farmland polluted by Cd reached 20 million hectares, which was mainly caused by irrigation due to industrial wastewater [5]. With the improvement in food safety standards and environmental awareness of the public, the prevention of Cd contamination of the food chain has become a common concern [6].…”

Section: Introductionmentioning

confidence: 99%

Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar

Zhu

Liang

et al. 2020

Water

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Removal of aquatic cadmium ions using biochar is a low-cost method, but the results are usually not satisfactory. Modified biochar, which can be a low-cost and efficient material, is urgently required for Cd-polluted water and soil remediation. Herein, poplar bark (SB) and poplar sawdust (MB) were used as raw materials to prepare modified biochar, which is rich in N- and S- containing groups, i.e., TSBC-600 and TMBC-600, using a co-pyrolysis method with thiourea. The adsorption characteristics of Cd2+ in simulated wastewater were explored. The results indicated that the modification optimized the surface structure of biochar, Cd2+ adsorption process by both TSBC-600 and TMBC-600 was mainly influenced by the initial pH, biochar dosage, and contact time, sthe TSBC-600 showed a higher adsorption capacity compared to TMBC-600 under different conditions. The Langmuir adsorption isotherm model and pseudo-second-order kinetic model were more consistent with the adsorption behavior of TSBC-600 and TMBC-600 to Cd2+, the maximum adsorption capacity of TSBC-600 and TMBC-600 calculated by the Langmuir adsorption isotherm model was 19.998 mg/g and 9.631 mg/g, respectively. The modification method for introducing N and S into biochar by the co-pyrolysis of biomass and thiourea enhanced the removal rate of aquatic cadmium ions by biochar.

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“…Single factor index method reflects single pollution index in soil, which is one of the commonly used methods at present [20][21]. Its calculation formula is as follows:…”

Section: Single Factor Index Methodsmentioning

confidence: 99%

Characteristics of Soil Heavy Metal Contents and its Source Analysis in Affected Areas of Luning Coal Mine in Huaibei Coalfield

Zhang¹,

Gui²,

Huang³

et al. 2021

Pol. J. Environ. Stud.

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Introduction China is rich in coal resources and is the world's largest coal producer and consumer. However, with the development and utilization of coal resources, a large number of wastes, such as coal gangue, mine water and fly ash, will be generated, causing pollution to the surrounding environment of the mining area [1-5]. In particular, under the action of spontaneous combustion, rainwater leaching and wind blowing, the trace heavy metal elements in the coal gangue and fly ash piled in the open air diffuse and migrate to the surrounding environment media, polluting the soil and leading to

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Spatial assessment of farmland soil pollution and its potential human health risks in China

Cited by 176 publications

References 63 publications

Assessing the Spatial Distribution of Soil PAHs and their Relationship with Anthropogenic Activities at a National Scale

Assessing the Spatial Distribution of Soil PAHs and their Relationship with Anthropogenic Activities at a National Scale

Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar

Characteristics of Soil Heavy Metal Contents and its Source Analysis in Affected Areas of Luning Coal Mine in Huaibei Coalfield

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