摘要
以玉米秸秆为原料,制备了锰氧化物改性的复合材料.利用扫描电镜(SEM)、红外光谱(FTIR)以及X射线衍射(XRD)等对材料进行表征.考察了溶液pH、反应温度、吸附时间等对吸附铕的影响.结果表明:溶液pH显著影响生物炭-锰氧化物复合材料对铕(Ⅲ)的吸附,最佳条件为pH=8,吸附过程符合准二级动力学方程和Langmuir模型,表明吸附过程为单分子层吸附,且以化学吸附为主.该复合材料的最大理论吸附量为68.31 mg·g^(-1).
Using corn stalk as a raw material,a manganese oxide modified composite material was prepared.The scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD),etc.were used to characterize the material.The influence of the pH value of the solution,the reaction temperature and adsorption time on the adsorption effect of Eu were investigated.The results show that the pH value affects the adsorption significantly when the optimum condition is pH=8.The adsorption process accords with the pseudo-second-order kinetic model and Langmuir adsorption isotherm model,indicating that the adsorption process is monolayer adsorption,mainly a chemical adsorption.The maximum theoretical adsorption capacity of the composite material is 68.31mg·g^(-1).
作者
石文
周雪
陈国和
SHI Wen;ZHOU Xue;CHEN Guohe(School of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000;School of Life Sciences,Shaoxing University,Shaoxing,Zhejiang 312000)
出处
《绍兴文理学院学报》
2021年第8期52-58,共7页
Journal of Shaoxing University
基金
浙江省公益技术应用社发领域项目“生物炭基土壤改良剂生态修复重金属污染土壤及其环境风险评估”(LGF21C030001).
