TIAN Aangran,TANG Qiang,ZHANG Yu,et al.Adsorption Properties of Incineration Bottom Ash of Municipal Solid Waste for Methylene Blue[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):491-496.
TIAN Aangran,TANG Qiang,ZHANG Yu,et al.Adsorption Properties of Incineration Bottom Ash of Municipal Solid Waste for Methylene Blue[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):491-496. DOI: 10.13409/j.cnki.jdpme.2020110928.
Adsorption Properties of Incineration Bottom Ash of Municipal Solid Waste for Methylene Blue
垃圾焚烧底灰(MSWI底灰)是垃圾焚烧的副产品之一,将MSWI底灰应用于透水路基,不仅能满足透水路基强度和渗透性需求,还能吸附雨水径流中的有机污染物。以苏州七子山垃圾焚烧厂MSWI底灰为原料,通过吸附试验及扫描电子显微镜(SEM),对其作为透水路基材料的吸附性能及机理进行了研究。结果表明,MSWI底灰的微观结构为球状结构,具有较大比表面积,粒径小于7.6 mm的底灰比表面积约为10 m
As a by-product of municipal solid waste incineration, municipal solid waste incineration (MSWI) bottom ash can be used as a permeable subgrade material, which can meet the requirement of strength and permeability, and adsorb the organic pollutants in the rainwater. In this paper, a series of adsorption tests and SEM tests were conducted to study its adsorption ability and mechanism. The results show that, its microstructure is globular, and has a large specific surface area, which is about 10 m
2
/g for bottom ash with particle size less than 7.6 mm. The dissolution of soluble salts can also increase the adsorption sites, thus promoting the adsorption of organic pollutants. The kinetic models and isothermal adsorption models reveal that the adsorption is monolayer adsorption, and the adsorption can reach equilibrium within 200 min. Due to the dissolution of soluble salts, the surface has certain heterogeneity, and the nonuniform coefficient is 0.75. According to the Langmuir isotherm adsorption model, the maximum adsorption capacity of methylene blue is about 5.44 mg/g.
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