以Mg-Al-LDHs为吸附剂脱除海水淡化产品水中硼的研究  

STUDY ON BORON REMOVAL FROM DESALTED WATER BY THE APPLICATION OF ADSORBENT Mg-Al-LDHs

作　　者：王超[1,2] 刘杰[2,3] 袁俊生[2,3] 

机构地区：[1]河北工业大学化工学院 [2]河北工业大学海水资源高效利用化工技术教育部工程研究中心 [3]河北工业大学海洋科学与工程学院,天津300130

出　　处：《水处理技术》2014年第11期32-36,共5页Technology of Water Treatment

基　　金：长江学者和创新团队发展计划(IRT1059);河北省重大技术创新项目(12276702Z);河北省科技支撑计划项目(13273102D;12273101)

摘　　要：考察了以Mg-Al-LDHs为吸附剂脱硼过程中,各条件对产物脱硼效率的影响,考察的因素包括：吸附剂用量、硼溶液浓度、p H、吸附反应时间、温度、阴离子和阳离子杂质等。结果表明,吸附剂对硼的饱和吸附量为35 mg/g;90%硼的吸附发生在反应的前2 h内;Langmuir吸附等温式能较好地描述硼的吸附过程;p H在8-10的范围内,吸附量均较大。p H在小于8时,单位吸附量随p H的变化量很小;p H大于8时,随p H的增大,吸附量降低。将Mg-Al-LDHs吸附剂应用于海水淡化产品水的脱硼,脱硼率可达到85%。The performance of adsorbent Mg-Al-LDHs in the process of boron removal from desalted water was studied under different conditions.These conditions include the dosage of adsorbent, the concentration of boron solution, p H, reaction time of adsorption, temperature, anionic and cationic impurities. The result was that the saturated adsorption capacity of the adsorbent for boron was 35 mg/g; 90% of the boron adsorption occurred within the first two hours of the reaction; the adsorption process could be described by Langmuir adsorption isotherm; the adsorption quantity was large when p H ranged from 8 to 10; when p H was lower than 8, changing p H had little effect on the unit adsorption quantity; when p H was higher than 8, the adsorption quantity decreased with p H increasing. Mg-Al-LDHs could be applied in boron removal from desalted water and boron removal rate could reach 85%.

关 键 词：层状双金属氢氧化物 脱硼 吸附 海水淡化 

分 类 号：TQ424.2[化学工程] P747[天文地球—海洋科学]