Zha Zhenglin, Ren Yongxiang, Wang Shaobin, Qian Zhuang, Yang Lei, Cheng Peng, Han Yun, Wang Man
Key Laboratory of Northwestern Water Resource and Environment Ecology of Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China
Department of Chemical Engineering, Curtin University GPO Box U1987 Perth Western Australia 6845 Australia
RSC Adv. 2018 May 24;8(34):19326-19334. doi: 10.1039/c8ra02474j. eCollection 2018 May 22.
Phosphorus is the main element for eutrophication of water bodies. Aluminate cement is a cheap building material rich in aluminium and calcium which have significant effects on phosphate adsorption. This study aimed at the investigation of removal behavior of phosphate by thermally dehydrated aluminate cement granules, treated at different temperatures, and the adsorption mechanisms. It was found that 600 °C was the optimal temperature, producing excellent granules with a particle size of 0.6-1.5 mm (T600), giving a great adsorption capacity of phosphate of 49.1 mg P per g and presenting fast and high initial adsorption, reaching a capacity of 23.7 mg P per g within 30 min at 20 °C. The phosphate adsorption process was dominated by chemical adsorption, mainly through inner-sphere complexion and phosphate precipitation on the surface of the adsorbent. Compared with other phosphate adsorbents, T600 may be an economical and efficient adsorbent.
磷是水体富营养化的主要元素。铝酸盐水泥是一种廉价的建筑材料，富含对磷酸盐吸附有显著影响的铝和钙。本研究旨在考察不同温度处理的热脱水铝酸盐水泥颗粒对磷酸盐的去除行为及其吸附机制。结果表明，600℃为最佳温度，制得的颗粒性能优良，粒径为0.6 - 1.5mm（T600），对磷酸盐的吸附容量高达49.1mg P/g，初始吸附快速且量大，在20℃下30min内可达23.7mg P/g。磷酸盐吸附过程以化学吸附为主，主要通过内球络合和吸附剂表面的磷酸盐沉淀实现。与其他磷酸盐吸附剂相比，T600可能是一种经济高效的吸附剂。
