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

Abstract

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.

Urban soil quality of Raipur, Chhattisgarh, India

“…A comparison with the metal concentrations reported in the soil of several locations in India and the world (Amouei et al., 2018; Benjamin et al. 2021; Khan & Kathi, 2014; Kim et al., 2020; Kladsomboon et al., 2020; Quan et al., 2015; Rao et al., 2014; Sakram et al., 2015; Sun et al., 2019; Yaylalı‐Abanuz, 2011) is summarized in Exhibit 8. It may be readily observed that the concentrations of Ba, Fe, Mn, and Pb found in the soil of the Raipur region are particularly high, calling for urgent action to control industrial effluents.…”

“…parable concentrations of these elements in the soils at various locations of India and other countries have been reported (Amouei et al, 2018;Benjamin et al, 2021;Khan & Kathi, 2014;Kim et al, 2020;Kladsomboon et al, 2020;Quan et al, 2015;Rao et al, 2014;Sakram et al, 2015;Sun et al, 2019;Yaylalı-Abanuz, 2011).…”

“…Exposure to contaminated soil – through ingestion, respiration, or skin absorption – results in a greater risk of health problems (Steffan et al., 2018). Hence, heavy metal contamination of surface soils is receiving increasing attention, and studies in various regions of India and the world have been reported (Amouei et al., 2018; Khan & Kathi, 2014; Kim et al., 2020; Kladsomboon et al., 2020; Quan et al., 2015;ss Rao et al., 2014; Sun et al., 2019; Yaylalı‐Abanuz, 2011).…”

Heavy Metal Content and Pollution Assessment in Typical Check Dam Sediment in a Watershed of Loess Plateau, China

“…Because soils are a major sink for heavy metals, the sediment contains a record of pollution in the area. Moreover, when environmental conditions (e.g., temperature, pH, and organic matter content) change, heavy metals may be redistributed in the sediment, causing secondary contamination [15,16]. Thus, establishing the sequence of sedimentary ages can reveal the historical inputs and associated trends in heavy metal pollution.…”

Development of Colorimetric Whole-Cell Biosensor for Detection of Heavy Metals in Environment for Public Health

“…With industrial development, environmental heavy metal contamination is becoming a serious problem and requires urgent remediation [ 1 ]. For example, heavy metals were detected in the soil of woodlands, grasslands, and farmlands in Suohuangcang National Wetland Park [ 2 ]. This kind of contamination can affect food, like fish, crops, and water.…”