污泥生物炭制备吸附陶粒
发布时间：2019-05-24 04:47
【摘要】：以城市污泥热解产生的生物炭(BC)与高岭土(KL)为原料制备吸附陶粒(SKC),研究其对环丙沙星(CIP)的吸脱附性能,开展吸附动力学和等温吸附特性研究,结合形貌、孔结构、物相组成、表面电位探讨其吸附机制,利用TCLP法研究重金属浸出特征.结果表明BC与KL以6∶4的质量比混合造粒,经1 050℃烧结5 min得到的SKC对CIP有明显的吸附效果,去除率达65.34%;SKC对CIP的吸附符合二级动力学模型,在不同质量浓度下的吸附特性适用于Freundlich等温吸附模型,吸附过程同时存在物理和化学吸附.SKC具有良好的孔隙结构,物相组成以硅铝氧化物、铁氧化物和金属磷酸盐为主,既能降低重金属的浸出毒性又具有良好的CIP吸附去除效果,有望为处理废水中高浓度CIP提供一种低成本可回收的吸附材料,也为BC的规模化安全利用提供了新思路.
[Abstract]:The adsorption and desorption properties of ciprofloxacin (CIP) were studied by using biochar (BC) and kaolin (KL) produced by municipal sludge pyrolysis as raw materials to study the adsorption and desorption properties of ciprofloxacin (CIP). The adsorption kinetics and isotherm adsorption characteristics were studied, and the morphology was combined with the adsorption kinetics and isotherm adsorption characteristics. The adsorption mechanism of pore structure, phase composition and surface potential was discussed. The leaching characteristics of heavy metals were studied by TCLP method. The results showed that BC and KL were mixed granulated at 6:4, and the SKC obtained by sintering at 1 050 鈩，
本文编号：2484572
[Abstract]:The adsorption and desorption properties of ciprofloxacin (CIP) were studied by using biochar (BC) and kaolin (KL) produced by municipal sludge pyrolysis as raw materials to study the adsorption and desorption properties of ciprofloxacin (CIP). The adsorption kinetics and isotherm adsorption characteristics were studied, and the morphology was combined with the adsorption kinetics and isotherm adsorption characteristics. The adsorption mechanism of pore structure, phase composition and surface potential was discussed. The leaching characteristics of heavy metals were studied by TCLP method. The results showed that BC and KL were mixed granulated at 6:4, and the SKC obtained by sintering at 1 050 鈩，
本文编号：2484572
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