镍铁渣在混凝土综合利用中的环境风险研究

从浸出机制和迁移扩散角度出发，研究了镍铁渣的产酸潜势、浸出毒性和其混凝土产品的浸出毒性。结果表明，镍铁渣产酸潜势为不产酸，本身不是一个酸性排放源；腐蚀性、浸出毒性小于国家标准限值。镍铁渣混凝土产品在酸性和碱性环境下，只有砷少量浸出，但未超过《地下水质量标准》。因此，镍铁渣可以直接入场作为混凝土掺和料进行综合应用，环境风险较小。

Environmental Risk Study on Utilization of Ferro-Nickel Slag in Concrete

From perspective of leaching mechanism and migration diffusion, acid generation potential, extraction toxicity of ferro-nickel slag and extraction toxicity(ET) of concrete products were studied. The results show that acid generation potential of ferro-nickel slag is non acid, which is not an acid emission source. Corrosion and ET are less than the limited value of national standard. In acid and alkaline environment, arsenic is leached from ferro-nickel slag concrete products, amount of which is less than standard for groundwater quality. The environmental risk of ferro-nickel slag is small, which can be directly used as one admixtures in concrete.