电解锰渣制备免烧铺路砖生态环境风险分析

Ecological and Environmental Risk Analysis of Preparation of Non fired Road Bricks from Electrolytic Manganese Residue

以电解锰渣为原料,采用半干压成型工艺生产免烧铺路砖产品。首先从产品重金属全量、浸出毒性方面评价产品的生态安全性,然后再通过室外长期雨水淋溶实验及室内盆浸试验分析锰渣免烧铺路砖中污染物的释放行为,评估锰渣基路砖的生态环境风险。通过对锰渣免烧铺路砖生态环境风险评估发现,锰渣免烧铺路砖产品中的氨氮极容易释放到环境中,存在较大的环境风险;锰渣免烧铺路砖产品中的重金属则较为稳定,环境风险较低。

Using electrolytic manganese slag as raw material,the semi dry pressing process is used to produce unburned paving bricks.Firstly,evaluate the ecological safety of the product from the aspects of total heavy metal content and leaching toxicity.Then,analyze the release behavior of pollutants in manganese slag unburned paving bricks through outdoor long-term rainwater leaching experiments and indoor pot leaching experiments,and evaluate the ecological environmental risks of manganese slag based paving bricks.Through the ecological risk assessment of manganese slag non fired paving bricks,it was found that the ammonia nitrogen in the products of manganese slag non fired paving bricks is easily released into the environment,posing significant environmental risks;the heavy metals in manganese slag non fired paving bricks are relatively stable and take lower environmental risks.