采用负载锆豆渣(ZLO)从水溶液和污水中吸附磷酸盐：固定床柱研究。
Adsorption of phosphate from aqueous solutions and sewage using zirconium loaded okara (ZLO): Fixed-bed column study.
机构信息
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), 15 Broadway, Ultimo, NSW 2007, Australia.
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), 15 Broadway, Ultimo, NSW 2007, Australia.
出版信息
Sci Total Environ. 2015 Aug 1;523:40-9. doi: 10.1016/j.scitotenv.2015.03.126. Epub 2015 Apr 7.
This study explores the potential of removing phosphorus from aqueous solutions and sewage by Zr(IV)-loaded okara (ZLO) in the fixed-bed column. Soybean residue (okara) was impregnated with 0.25M Zr(IV) solution to prepare active binding sites for phosphate. The effect of several factors, including flow rate, bed height, initial phosphorus concentration, pH and adsorbent particle size on the performance of ZLO was examined. The maximum dynamic adsorption capacity of ZLO for phosphorus was estimated to be 16.43mg/g. Breakthrough curve modeling indicated that Adams-Bohart model and Thomas model fitted the experimental data better than Yoon-Nelson model. After treatment with ZLO packed bed column, the effluent could meet the discharge standard for phosphorus in Australia. Successful desorption and regeneration were achieved with 0.2 NaOH and 0.1 HCl, respectively. The results prove that ZLO can be used as a promising phosphorus adsorbent in the dynamic adsorption system.
本研究探索了在固定床柱中用负载锆（IV）的豆渣（ZLO）从水溶液和污水中去除磷的潜力。将大豆渣（豆渣）用 0.25M 锆（IV）溶液浸渍，以制备用于磷酸盐的活性结合位点。考察了流速、床层高度、初始磷浓度、pH 值和吸附剂粒径等多种因素对 ZLO 性能的影响。ZLO 对磷的最大动态吸附容量估计为 16.43mg/g。穿透曲线模型表明，Adams-Bohart 模型和 Thomas 模型比 Yoon-Nelson 模型更适合拟合实验数据。用 ZLO 填充床柱处理后，出水可达到澳大利亚磷的排放标准。分别用 0.2 NaOH 和 0.1 HCl 进行了成功的解吸和再生。结果证明，ZLO 可用作动态吸附系统中一种有前途的磷吸附剂。
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