摘要
以玉米秸秆为原料,采用共沉淀法制备得到铁镧负载玉米秸秆生物炭复合材料(Fe-La-BC),采用扫描电子显微镜(SEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)等对复合材料进行表征,并研究了溶液初始pH值、Fe-La-BC用量及共存离子等因素对吸附过程的影响.结果表明:玉米秸秆生物炭经铁镧改性后,吸附性能明显提高约50%;在25℃,pH=2,Fe-La-BC投加量为2.5 g/L时,Fe-La-BC对锑的去除率达到71.13%.Fe-La-BC对锑的吸附过程符合伪二级动力学模型和Langmuir吸附等温线模型.
Using corn stalks as raw materials,the iron lanthanum-supported corn stalk biochar composite material(Fe-La-BC)was prepared by the co-precipitation method.The composite materials were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FTIR).The effects of initial pH value of the solution,amount of Fe-La-BC,coexisting ions and other factors on the adsorption process were studied.The results show that the adsorption performance of corn stalk biochar after modified by iron lanthanum increases by about 50%;at 25℃,pH=2,and the dosage of Fe-La-BC is 2.5 g/L,the removal rate of antimony by Fe-La-BC reaches 71.13%.The adsorption process of Fe-La-BC to antimony accords with the pseudo-second-order kinetic model and Langmuir adsorption isotherm model.
作者
周雪
吴贵亮
陈国和
ZHOU Xue;WU Guiliang;CHEN Guohe(School of Life Sciences,Shaoxing University,Shaoxing,Zhejiang 312000)
出处
《绍兴文理学院学报》
2022年第8期55-62,共8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).
关键词
生物炭
铁
镧
复合材料
吸附
锑
biochar
iron
lanthanum
composite material
adsorption
antimony
