Leaching impacts Ni toxicity differently among soils but increases its predictability according to nitrification assay |
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| Authors: | Li Xiaofang Huang Yizong Ma Yibing Sun Jinwei Cui Haojie |
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| Institution: | (1) Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361003, China;(2) Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;(3) Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient Cycling, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China;(4) College of Forestry, Guangxi University, Nanning, 530001, China; |
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| Abstract: | Purpose Deriving toxicity thresholds through bioassays has become the scientific basis for the risk assessment of metal contamination
in soils, but few studies have been reported for Ni toxicity in Chinese soils. In addition, although leaching has been recommended
to increase the ecological relevance of the output of soil toxicity bioassays, its impacts on Ni threshold and soil solutions
in soils remained to be shown. Therefore, in this study, 17 soils were collected throughout China and were assessed for Ni
toxicity using substrate-induced nitrification (SIN) assay for both un-leached and leached treatments. Meanwhile, soil solutions
of all Ni treatments were extracted and analyzed. This study provides information for the development of a terrestrial biotic
ligand model (TBLM) for Ni in Chinese soils. |
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