摘要
为探究酸活化赤泥作为人工湿地填料基质对城市雨水径流的除磷效果,以赤泥(RM)为原料,经盐酸活化后与水泥按一定比例混合制得酸活化赤泥(ARM)颗粒,检测了ARM颗粒的力学性能,并研究了RM颗粒和ARM颗粒对磷的吸附性能及去除机理。结果表明:当酸化赤泥与水泥质量配比为3∶7时,制得的颗粒除磷效果最佳且力学性能最好。RM和ARM颗粒中磷的质量分数由0.0%分别增至7.5%和8.1%,说明溶液中的磷酸盐被RM和ARM颗粒去除。比表面积分析表明:ARM颗粒的比表面积为33.21 m^(2)/g,远大于RM颗粒RM的5.32 m^(2)/g。SEM图表明:RM颗粒表面较为平整密实,表面孔隙少且孔径较大;而以ARM颗粒表面粗糙,结构疏松,有大量细密的微孔,经水化作用生成棒状结构。FTIR结果表明:RM和ARM颗粒中O-H、Fe-O、O-C-O和Si-O-Al等基团助于溶液中磷酸盐的去除。
In order to explore the phosphorus removal effect of acid-activated red mud as constructed wetland substrate on urban Rain Water runoff,acid activated red mud(ARM)particles were prepared from red mud(RM)activated by hydrochloric acid and mixed with cement in a certain proportion.The mechanical properties of ARM particles were tested,and the phosphorus adsorption properties and removal mechanism of RM and ARM particles were studied.The results show that when the mass ratio of ARM to cement is 3∶7,the phosphorus removal effect and the mechanical properties of the particles are the best.The mass fraction of phosphorus in RM and ARM particles increases from 0.0%to 7.5%and 8.1%respectively,indicating that the phosphate in the solution is removed by RM and ARM particles.Specific surface area analysis shows that the specific surface area of ARM particles is 33.21 m^(2)/g,which is much larger than the 5.32 m^(2)/g of RM particles RM.The SEM diagram shows that the surface of RM particles is smooth and dense,with few pores and large pores,while ARM particles have rough surface,loose structure and a large number of fine micropores,which forms a rod-like structure by hydration.FTIR results show that Omurh,Fe-O,O-C-O and Si-O-Al groups in RM and ARM particles contribute to the removal of phosphate in solution.
作者
胡建龙
孙瑜晨
甄志磊
Hu Jianlong;Sun Yuchen;Zhen Zhilei(Shanghai Xuhui Planning Architecture Design Co.,LTD,Shanghai 200233,China;College of Urban and Rural Construction,Shanxi Agricultural University,Taigu,Shanxi 030800,China)
出处
《绿色科技》
2023年第14期121-126,共6页
Journal of Green Science and Technology
关键词
赤泥
酸活化
颗粒
磷
red mud
acid activation
particle
phosphorus
