新型Mg-Al吸附剂去除压水堆核电厂废水中高浓度硼  

New Mg-Al Type Sorbent for Efficient Removal of Boron from Waste Water Containing High-concentration of Boron from Pressurized Water Reactor Nuclear Power Plants

作　　者：靳科研 白璞 李小龙 张佳楠[3] 闫文付[1] JIN Keyan;BAI Pu;LI Xiaolong;ZHANG Jianan;YAN Wenfu(State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China;Nuclear and Radiation Safety Center,Ministry of Ecology and Environment,Beijing 100082,China;College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450002,China;Luoyang Jalon Micro-Nano New Materials Co.,Ltd.,Luoyang 471900,China)

机构地区：[1]吉林大学无机合成与制备化学国家重点实验室,化学学院,长春130012 [2]生态环境部核与辐射安全中心,北京100082 [3]郑州大学材料科学与工程学院,郑州450002 [4]洛阳建龙微纳新材料股份有限公司,洛阳471900

出　　处：《高等学校化学学报》2022年第2期1-9,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:U1967215,21835002,21621001,21875221);高等学校学科创新引智计划(批准号:B17020)资助。

摘　　要：通过特定的焙烧过程制备了不含碳酸根的Mg-Al型层状双金属氧化物.该层状双金属氧化物在废水中可水解为层状双金属氢氧化物,从而能够通过四级串联吸附处理的方式将模拟核电厂含硼废水中的硼浓度由初始的2000 mg/L显著降低至10 mg/L,满足内陆拟建核电厂需要将含硼废水硼浓度处理至30 mg/L以下的技术要求.在pH=10.61,固液比为1/40 g/mL,吸附温度为20℃条件下,吸附剂的硼吸附量可高达39.64 mg/g.此外,还在分子层次上讨论了中间氧化物的形成机理以及其水解生成层状双金属氢氧化物的机理,探讨了核电厂高浓度含硼废水的p H值、初始硼浓度、吸附剂用量和搅拌时间等条件对吸附剂硼吸附性能的影响.A new Mg-Al type layered double hydroxide(LDH)free of CO_(3)^(2−) was formed via a specific process consisting of the steps of first calcination and subsequent hydrolyzation in water of LDH source material.The resultant Mg-Al LDH can efficiently remove boron from simulated waste water containing high-concentration of boron from pressurized water reactor nuclear power plants.The concentration of boron in the simulated boron-containing waste water was reduced from 2000 mg/L to 10 mg/L by three cycles-relay treatment using the sorbent developed here,which met the requirement that the concentration of boron in the waste water has to be less than 30 mg/L for the construction of new inland nuclear power plants.The maximum sorption capacity of the sorbent developed in this study was as high as 39.64 mg/g at pH of 10.61 and temperature of 20℃.Meanwhile,the structural evolution at molecular level during the calcination and hydrolyzation process was investigated.The influence of parameters such as pH value,initial boron concentration,sorbent dosage,and agitation time on boron removal was also investigated.

关 键 词：Mg-Al-OH型层状双金属氢氧化物 吸附 除硼 压水堆核电厂废水 

分 类 号：O647.33[理学—物理化学]