2022
DOI: 10.1016/j.psep.2022.06.051
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Ecological risk source distribution, uncertainty analysis, and application of geographically weighted regression cokriging for prediction of potentially toxic elements in agricultural soils

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Cited by 15 publications
(5 citation statements)
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“…The value of RI was computed using the following equations: where represents the pollution coefficient of heavy metals i , represents the determined concentration of heavy metals i (mg/kg), denotes the background values of heavy metals (mg/kg), represents the sum of pollution coefficients of different heavy metals, denotes the potential ecological risk factor, represents the potential ecological RIs, denotes the toxicity coefficient of heavy metals, and i denotes the toxicity level of heavy metals and the organisms’ sensitivity to heavy metal pollution, and its values are Zn = 1, Cr = 2, Co = Ni = Cu = Pb = 5, and Cd = 30 [ 35 ]. According to the determined level of toxicity of the heavy metals, we also considered the high heavy metal content and biological activity in the study area, defining five categories of and four categories of ( Table 2 ) [ 36 , 37 ]. However, other evaluation criteria have been used by Barcauskaite et al 2020, Wu et al 2010, Zhu et al 2012 [ 38 , 39 , 40 ].…”
Section: Methodsmentioning
confidence: 99%
“…The value of RI was computed using the following equations: where represents the pollution coefficient of heavy metals i , represents the determined concentration of heavy metals i (mg/kg), denotes the background values of heavy metals (mg/kg), represents the sum of pollution coefficients of different heavy metals, denotes the potential ecological risk factor, represents the potential ecological RIs, denotes the toxicity coefficient of heavy metals, and i denotes the toxicity level of heavy metals and the organisms’ sensitivity to heavy metal pollution, and its values are Zn = 1, Cr = 2, Co = Ni = Cu = Pb = 5, and Cd = 30 [ 35 ]. According to the determined level of toxicity of the heavy metals, we also considered the high heavy metal content and biological activity in the study area, defining five categories of and four categories of ( Table 2 ) [ 36 , 37 ]. However, other evaluation criteria have been used by Barcauskaite et al 2020, Wu et al 2010, Zhu et al 2012 [ 38 , 39 , 40 ].…”
Section: Methodsmentioning
confidence: 99%
“…The toxicity coefficient of heavy metal are the values of Zn = 1, Cr = 2, Co = Ni = Cu = Pb = 5, Hg = 40, and Cd = 30. Since the heavy metal species in this study were different from Hakanson [ 38 ], the RI limits corresponding to each ecological risk level were adjusted according to the heavy metal species and their toxicity coefficients, and the adjusted evaluation criteria were: RI < 150 for minor potential ecological risk; 150 ≤ RI < 300 for medium potential ecological risk; 300 ≤ RI < 600 for strong potential ecological risk; where RI < 150 is a slight potential ecological risk; 150 ≤ RI < 300 is a medium potential ecological risk; 300 ≤ RI < 600 is a strong potential ecological risk; RI ≥ 600 is a very strong potential ecological risk [ 39 , 40 ].…”
Section: Methodsmentioning
confidence: 99%
“…The enrichment factor (EF) [40][41][42], geological accumulation index (I geo ) [43,44], potential ecological risk index (RI) [45][46][47] and risk assessment index (RAC) [48] were used to assess the ecological risk and source analysis of soil heavy metals. The formulas for these parameters can be found in reference [1][2][3][4][5][6][7][8].…”
Section: Ecological Risk Assessmentmentioning
confidence: 99%