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This study collected 616 toxicological data of 8 elements on 5 species and 3 microbial processes in 31 Chinese soils through literature collection, attempting to construct a new model for predicting the toxicity of limited elements in soil data—the Quantitative ion characteristic activity relationship (s-QICAR) model. Firstly, based on the normalization method of soil properties, the toxicity values (logEC10; 1.42~3.35) of 8 elements to 5 species and 3 microbial processes were obtained under three soil scenarios of acidic, neutral, and alkaline. On this basis, the relationship between the 23 structural characteristic parameters of elements and their corresponding biological toxicity values was analyzed, and 24s-QICAR models (R2=0.70~0.98; P=0.001~0.023) were established using the covalent radius (CR) of elements. Furthermore, s-QICAR was used to predict the logEC10 (1.44~3.20) of V, As, Se, and Sn for 8species. Combined with the species sensitivity distribution curve, the HC5values of these four elements protecting 95% of organisms under three scenarios were calculated. After correction, the predicted no-effect concentrations of the four elements in acidic, neutral, and alkaline soil scenarios were V: 13, 16, 17mg/kg; As: 10, 13, 15mg/kg; Se: 4.9, 7.2, 8.4mg/kg; Sn: 42, 44, 45mg/kg, and the ecological risk threshold map for these 4elements was drawn. This study establishes a new method applicable to the ecological risk of soil elements in China, providing scientific basis for soil environmental risk assessment and management.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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