1.苏州大学轨道交通学院,江苏 苏州 215141
2.京都大学地球环境学舍,日本 京都 606-8501
田盎然(1996—),男,硕士研究生。主要从事道路工程材料研究。E-mail:gangguo@126.com
唐强(1985—),男,教授,博士。主要从事道路工程材料研究。E-mail:tangqiang@suda.edu.cn
收稿:2020-06-22,
修回:2020-11-09,
纸质出版:2021-06-16
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田盎然,唐强,张宇等.生活垃圾焚烧底灰对亚甲基蓝的吸附性能研究[J].防灾减灾工程学报,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.
田盎然,唐强,张宇等.生活垃圾焚烧底灰对亚甲基蓝的吸附性能研究[J].防灾减灾工程学报,2021,41(03):491-496. DOI: 10.13409/j.cnki.jdpme.2020110928.
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.
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
2
/g。可溶盐的溶解也能够增加吸附点位,从而促进有机物的吸附。动力学模型和等温吸附模型揭示了吸附为单分子层吸附,吸附能够在200 min内达到平衡。由于可溶盐的溶解,表面具有一定的非均匀性,非均匀系数为0.75。根据Langmuir等温吸附模型计算,其对亚甲基蓝的最大吸附量约为5.44 mg/g。
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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