Mg(OH)_(2)及与Al^(3+)离子共存时去除植酸的性能与机理研究  

Study on the Performance and Mechanism of IHP Removal by Mg(OH)_(2) and with Al^(3+)Ions Coexisted

作　　者：陆泓波 任金明 王永明 俞翔 LU Hongbo;REN Jinming;WANG Yongming;YU Xiang(Power China Huadong Engineering Corporation,Hangzhou 311122,China;Zhejiang University,Hangzhou 310058,China;Zhejiang Engineering Research Center of Green Mine Technology and Intelligent Equipment,Hangzhou 311122,China;Hehai University,Nanjing 213002,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]浙江大学,浙江杭州310058 [3]绿色矿山技术与智能装备浙江省工程研究中心,浙江杭州311122 [4]河海大学,江苏南京213022

出　　处：《水处理技术》2023年第5期52-55,62,共5页Technology of Water Treatment

基　　金：浙江省自然科学基金项目(LQ19B070001);中国博士后科学基金资助(2022M712971)。

摘　　要：通过低浓度镁离子和氢氧根离子自然沉淀,低温4 oC减慢合成速度来合成Mg(OH)_(2),并研究其对于IHP的吸附去除作用和机理。研究结果表明:IHP在Mg(OH)_(2)表面的吸附热力学符合Freundlich模型,且吸附速率较快,在反应3 min时已达到平衡吸附量的75%。而且Mg(OH)_(2)对于IHP的吸附具有pH依赖性。对于其机理研究发现,IHP的吸附去除会促进Mg(OH)_(2)的溶解,Mg^(2+)离子先释放进入环境中再被Mg(OH)_(2)重新吸附,从而促进IHP的进一步吸附。另外Mg(OH)_(2)与Al3+共存时对于IHP的去除具有协同作用,其作用效果大于两者单独作用效果的简单叠加。In this study,Mg(OH)_(2)was synthesized by precipitation of low-concentration magnesium ions and hydroxide ions to study its adsorption effect and mechanism for IHP.The results show that the adsorption thermodynamics of IHP on Mg(OH)_(2)conformed to Freundlich model,and the adsorption rate was fast(reached 75%of the equilibrium adsorption capacity at 3 min).Moreover,the adsorption of IHP on Mg(OH)_(2)was pH dependent.For its mechanism,it was found that the adsorption of IHP promoted the dissolution of Mg(OH)_(2).Mg^(2+)ions were first released into the environment and then adsorbed by Mg(OH)_(2),so as to promote the further adsorption of IHP.In addition,the coexistence of Mg(OH)_(2)and Al3+had a synergistic effect on the removal of IHP,and its effect was greater than that of the two alone.

关 键 词：氢氧化镁 肌醇六磷酸 吸附 铝离子 

分 类 号：X703[环境科学与工程—环境工程]