CAJ | 학술논문

以固体废弃物地铁渣土为主要原料,辅以氧化镁混合改性,在较低温度下制备一种除磷陶粒。研究了烧结温度、氧化镁掺量、吸附溶液pH值、吸附温度和吸附时间等因素对陶粒磷吸附性能的影响。结果表明,氧化镁掺量为20%时,300℃预热25 min后在700℃烧结20 min可得到强度适中、性能优异的水体除磷陶粒。 pH=6.0时陶粒具有较高的磷吸附性能,升高温度,有利于溶液中磷的吸附,80℃下的最大吸附量为3811.6 mg/kg,2 h内基本能达到吸附平衡,吸附动力学规律基本符合Lagergren准二级反应。
이고체폐기물지철사토위주요원료,보이양화미혼합개성,재교저온도하제비일충제린도립。연구료소결온도、양화미참량、흡부용액pH치、흡부온도화흡부시간등인소대도립린흡부성능적영향。결과표명,양화미참량위20%시,300℃예열25 min후재700℃소결20 min가득도강도괄중、성능우이적수체제린도립。 pH=6.0시도립구유교고적린흡부성능,승고온도,유리우용액중린적흡부,80℃하적최대흡부량위3811.6 mg/kg,2 h내기본능체도흡부평형,흡부동역학규률기본부합Lagergren준이급반응。
Using solid waste residue of subway construction as the main raw material,mixing with magnesi-um oxide,a novel composite ceramsite was prepared. Sintering temperature,content of magnesium oxide, effect of adsorption pH,temperature and contact time were investigated. The optimal preparation of the com-posite ceramsite obtained at 300℃ after preheating 25 min and then 20 min of sintered at 700℃,which the content of magnesium oxide was 20%. The optimum of adsorption was pH 6. 0. Sorption capacity increased with increasing the sorption temperature, and the maximum sorption capacity can reach 3 811. 6 mg/kg when the initial temperature was 80 ℃. The adsorption kinetics was reasonable fast,and sorption equilibri-um can reach within 2 h,and the Lagergren pseudo-second-order kinetics can fit the data well.