Spatial distribution and source identification of heavy metals in soils under different land uses in a sewage irrigation region, northwest China

Liu, Bailin; Ma, Xinwang; Ai, Shiwei; Zhu, Saiyong; Zhang, Wenya; Zhang, Yingmei

doi:10.1007/s11368-016-1351-3

Cited by 73 publications

(22 citation statements)

References 21 publications

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“…Due to increasing interest in the use of sewage for irrigation and in light of the possible effects of sewage on agricultural soils and crop production, the influence of effluent irrigation on the physical, chemical, and biological properties of soil have been well documented [ 6 , 7 , 8 ]. Previous studies have shown that sewage irrigation is frequently accompanied by increases in macro- and micro-nutrients and heavy metals in the soil [ 9 , 10 , 11 , 12 ] in addition to changes in soil microbial functional diversity and enzymatic activity [ 13 , 14 , 15 ]. Sewage irrigation can also increase the risk of crop and groundwater pollution [ 16 , 17 ] and reduce soil quality [ 18 ] and the infiltration rate [ 8 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sewage Irrigation on the CT-Measured Soil Pore Characteristics of a Clay Farmland in Northern China

Gao

Zhao

Liu

et al. 2018

IJERPH

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Sewage irrigation has a strong influence on the physical, chemical, and biological properties of soil. However, the effects of sewage irrigation on the pore characteristics of soil are not well understood. This study compares the effects of sewage irrigation and groundwater irrigation on computed tomography (CT)-measured pore parameters and examines the relationships between CT-measured pore parameters and soil physicochemical and microbial properties. Intact soil cores were collected from S1 irrigated with sewage for 25 years, S2 irrigated with sewage for 52 years, and CK irrigated with groundwater. Various soil pore characteristics were determined, including the total pore number, macropore number (>1 mm diam.), coarse mesopore number (0.264–1 mm diam.), total porosity, macroporosity, coarse mesoporosity, and circularity. The results indicated that sewage irrigation significantly affected soil pore number and porosity. Compared with S1 and S2, CK exhibited a higher average total pore number (91), macropore number (40), coarse mesopore number (51), total porosity (2.08%), macroporosity (1.90%), and coarse mesoporosity (0.18%) throughout the 50–350 mm layer. At depths of 200–350 mm, S2 exhibited the lowest average total pore number (33), macropore number (13), coarse mesopore number (21), total porosity (0.42%), macroporosity (0.35%), and coarse mesoporosity (0.07%) among the three sites. In addition, the average pore numbers and porosity at depths of 200–350 mm decreased with increasing sewage irrigation time. There were significant positive correlations between pore features (including pore numbers and porosity) and soil properties (phosphorus content and fungi numbers). Our results suggest that decreased macropore numbers and macroporosity in the sewage-irrigated farmland may strongly intensify the accumulation of metals and nutrients in the upper layer. The findings of this study are useful for understanding the negative effects of sewage irrigation on soil pore structure and are critical for developing sustainable strategies in agriculture.

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Section: Introductionmentioning

confidence: 99%

Effect of Sewage Irrigation on the CT-Measured Soil Pore Characteristics of a Clay Farmland in Northern China

Gao

Zhao

Liu

et al. 2018

IJERPH

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“…Anthropogenic cultivation activities greatly affected soil heavy metals. Land use pattern affected the heavy metal contents in soils through different agricultural inputs, irrigation, plowing, and other cultivation activities of humans (Liu et al 2016;Zhou et al 2008). In our research under traditional agriculture, the surface paddy soils had higher contents of Pb, Cd, and Hg than the surface dry land soils that had developed from the same parent materials from the Shaximiao formation, and the differences in Pb and Cd were significant according to one-way ANOVA, indicating a large influence of the land use pattern on heavy metal contents in surface soils.…”

Section: Effect Of Human Cultivation On Heavy Metals Contents In Surfmentioning

confidence: 99%

“…Different long-term fertilizer treatments have different effects on the heavy metal contents of purple soils (Gao 2008;Zheng 2016). Furthermore, in purple hilly regions, the land consolidation period of farmland has different effects on soil physical and chemical properties (Liu et al 2016), and farming plot reconstruction engineering has changed the soil profile patterns, soil thickness, physical and chemical properties, and chemical weathering intensity (Tang et al 2019). However, the effects of anthropogenic cultivation activities (i.e., traditional cultivation, soil consolidation, and agricultural intensification) on heavy metal contamination have been scarcely studied.…”

Section: Introductionmentioning

confidence: 99%

Distribution Characteristics of Soil Heavy Metals, their Source Identification and their Changes Influenced by Anthropogenic Cultivation Activities in Purple Hilly Regions of Sichuan Basin, China

Wang

Liu

et al. 2020

J Soil Sci Plant Nutr

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To investigate the distribution and, possible sources of soil heavy metals and the effects of anthropogenic cultivation activities on the contents of these metals in purple hilly regions of China, samples of soils and parent materials in purple hilly regions of China were collected before and after land consolidation and after 7 and 19 months of intensive agricultural production, and contents of Pb, Cd, Cu, Zn, Cr, Ni, Hg, and As were analyzed. The results showed that, in the soil samples compared with the parent materials, the greatest accumulation of Cd, As, and Hg occurred in surface layer and a few other horizons. Furthermore, the Cd and Hg contents showed the largest differences among different soil horizons. Parent materials played an important role and anthropogenic cultivation activities greatly affected the soil heavy metals. Under traditional agriculture, Pb, Cd, and Hg had higher contents in surface paddy soils than in surface dry land soils. Land consolidation induced the homogenization of heavy metal elements and dramatically reduced Cd and Hg in the surface soils. The As and Hg contents in the surface soils increased after 19 months of intensive agricultural production. Multivariate statistical analysis (correlation analysis and principal component analysis (PCA)) showed that all eight metals were well represented by the first two principal components (PCs). PC1, which showed relatively high loadings for Cr, Zn, Cu, Ni, and As, was associated with parent materials and therefore represented natural sources. PC2 showed relatively high loadings for Pb, Cd, and Hg, reflecting the effect of air pollution under traditional agriculture, and showed relatively high loadings for Cd, Hg, As, and Pb, reflecting the effect of fertilization under intensive agriculture. This study provides guidelines for the prevention of soil heavy metal pollution and the remediation of polluted soils in purple hilly regions of Sichuan Basin, China.

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“…It was then digested with a mixture acid system of "HNO 3 -HF-HClO 4 " (5, 4, and 2 mL, respectively). Finally, the digested solution was diluted to 25 mL with deionized water [19]. The contents of Cd, Cu, Cr, Pb and Zn were determined using an atomic absorption spectrophotometer (FAAS, Perkin-Elmer, Norwalk, OH, USA).…”

Section: Soil Sampling and Analysismentioning

confidence: 99%

Effect of Land Use Conversion on Surface Soil Heavy Metal Contamination in a Typical Karst Plateau Lakeshore Wetland of Southwest China

Sun

Zhu

Zhao

et al. 2019

IJERPH

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Land use conversion could directly or indirectly influence heavy metal geochemistry by changing soil properties. The aim of this study was to explore the effect of land use conversion on surface soil heavy metal contamination in the karst plateau lakeshore wetlands of Southwest China. Based on this, a total of 120 soil samples were collected from 30 sites from different types of land uses (farmlands, grasslands and woodlands) around a lake in Suohuangcang National Wetland Park in August 2017. Contents of As, Cd, Cu, Cr, Hg, Pb and Zn were analyzed, and soil heavy metal contamination was assessed in all three land use types. Results showed that land use transformation from farmland to grassland or woodland was not conducive to the release of soil heavy metal. Surface soil of all three land use types have been moderately polluted by As, Cr, Pb, and Zn, and grassland and woodland also had moderate Cd contamination. The pollution load index (PLI) results revealed low heavy metal contamination in grassland and woodland but no contamination in farmland. Although the integrated contamination in the studied region did not pose a serious potential ecological risk (RI < 150), it might affect human health through the water supply and food chain. Therefore, it is necessary to monitor and control As, Cd, Cr, Pb, and Zn concentrations of surface soil through controlling pollutants, improving waste treatment, as well as strengthening supervision and management in the vicinity of the Suohuangcang National Wetland Park.

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Spatial distribution and source identification of heavy metals in soils under different land uses in a sewage irrigation region, northwest China

Cited by 73 publications

References 21 publications

Effect of Sewage Irrigation on the CT-Measured Soil Pore Characteristics of a Clay Farmland in Northern China

Effect of Sewage Irrigation on the CT-Measured Soil Pore Characteristics of a Clay Farmland in Northern China

Distribution Characteristics of Soil Heavy Metals, their Source Identification and their Changes Influenced by Anthropogenic Cultivation Activities in Purple Hilly Regions of Sichuan Basin, China

Effect of Land Use Conversion on Surface Soil Heavy Metal Contamination in a Typical Karst Plateau Lakeshore Wetland of Southwest China

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