摘要
用饱和Ca(OH)_2和浓度为0.02 mol/L的磷酸氢二铵溶液对桉树块进行改性获取新材料桉树遗态钙羟基磷灰石(HAP/C)复合材料,用于吸附水中的Pb^(2+),研究温度和时间对吸附的影响,并通过经典模型拟合,材料吸附前后的EDS、XRD和FT-IR表征探讨其吸附机理。结果表明,吸附更符合Langmuir等温模型拟合(R^2>0.99);吸附动力学特征很好地遵循准二级动力学模型(R^2=1);吸附剂中的磷灰石与Pb^(2+)发生了离子交换、表面吸附、溶解-沉淀作用,Pb^(2+)被固定在磷灰石中。
The modified eucalyptus-derived calcium hydroxyphospate（HAP/C） composites were modified with saturated calcium hydroxide and 0. 02 mol/L diammonium hydrogen phosphate,and applied in adsorption of Pb2 ＋in water,to study the effects of temperature and time on adsorption,and also the adsorption mechanism was discussed by the classical model fitting,before and after adsorption material＇s EDS,XRD and FT-IR characterization. The results showed that,the adsorption was more in line with Langmuir isotherm model（R2 0. 99）,the adsorption kinetics characteristics followed pseudo good second kinetics（R2= 1）,the apatite of adsorbent and Pb2 ＋occurred ion exchange,adsorption,dissolution-precipitation and Pb2 ＋was fixed in the apatite.
作者
莫超
朱宗强
曹爽
朱义年
林局
王敦球
陈强
MO Chao;ZHU Zongqiang;CAO Shuang;ZHU Yinian;LIN Ju;WANG Dunqiu;CHEN Qiang(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology Guilin, Guangxi 541004)
出处
《工业安全与环保》
2018年第4期69-73,共5页
Industrial Safety and Environmental Protection
基金
国家自然科学基金(21707024
41763012
51638006)
广西高校科学技术研究重点项目(KY2015ZD053)
广西科学研究与技术开发计划项目(桂科攻14124004-3-3)
广西矿冶与环境科学实验中心项目(KH2012ZD004)
