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A facile manufacture of highly adsorptive aggregates using steel slag and porous expanded silica for phosphorus removal
Resources, Conservation and Recycling ( IF 13.2 ) Pub Date : 2020-10-31 , DOI: 10.1016/j.resconrec.2020.105238
Fan Wu , Qingliang Yu , F. Gauvin , H.J.H. Brouwers

Natural adsorptive materials are mainly based on physical adsorption and have limited adsorption capacity. Artificial adsorptive aggregates lead to great potential in improving water quality for water treatment. This study aims to develop a porous and sustainable adsorptive aggregate combining both chemical and physical adsorption capacities. Industrial by-product steel slag (SS) powder is used in conjunction with porous expanded silicate (ES) powder applying a non-sintered pelletizing method for producing sustainable high adsorptive aggregates, and bio-based miscanthus (M) is used to further increase its permeability and porosity. The results show that the bulk density of the resulting adsorptive aggregates varies from 570 kg/m3 to 882 kg/m3, with a bulk crushing strength of up to 5.1 MPa. Moreover, all adsorptive aggregates have outstanding resistance to salt and freeze-thaw cycles. Phosphorus (P) adsorption tests show that the adsorptive aggregates remove the P in aqueous solution (168 mg/L), with an adsorption capacity of 4.2 mg/g. The research demonstrates that sustainable high adsorptive aggregates with good mechanical properties can be produced applying the facile pelletizing method, suitable for the application in the field of water treatment such as adsorptive concrete, constructed wetlands and rainwater gardens.



中文翻译:

使用钢渣和多孔膨胀二氧化硅去除磷的方法轻松制造高吸附性骨料

天然吸附材料主要基于物理吸附,吸附能力有限。人工吸附性聚集体在改善水处理用水质量方面具有巨大潜力。这项研究旨在开发一种兼具化学和物理吸附能力的多孔且可持续的吸附性骨料。工业副产品钢渣(SS)粉末与多孔膨胀硅酸盐(ES)粉末结合使用,该粉末采用非烧结造粒方法生产可持续的高吸附性骨料,而生物基山茱can(M)用于进一步增加其渗透率和孔隙率。结果表明,所得吸附性聚集体的堆积密度在570 kg / m 3至882 kg / m 3的范围内变化。,整体抗碎强度高达5.1 MPa。此外,所有吸附性聚集体均具有出色的耐盐和冻融循环能力。磷(P)吸附测试表明,吸附性聚集体可去除水溶液(168 mg / L)中的P,吸附量为4.2 mg / g。研究表明,采用简便的造粒方法可以生产出具有良好机械性能的可持续性高吸附性骨料,适用于水处理领域,如吸附性混凝土,人工湿地和雨水花园。

更新日期:2020-11-02
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