摘要
热解经过氯化铁和高锰酸钾浸渍的小麦秸秆,制备了铁锰金属氧化物/生物炭复合材料,用以去除水中六价铬。研究发现,复合材料在溶液p H值从3.00升高到9.00时对Cr(VI)的吸附量从14.7 mg/g下降到11.9 mg/g。吸附温度小于35℃时,吸附Cr(VI)的平衡吸附量都随着温度的升高而升高。等温吸附实验数据符合Langmuir方程,且最大吸附量为45.391 3 mg/g。吸附动力学分析发现,吸附过程遵循二级动力学方程。上述结果说明铁锰氧化物/生物炭复合材料对于去除水中Cr(VI)具有潜在价值。
To remove Cr(Ⅵ) in water, wheat straw impregnated with FeCland KMnOwas pyrolysed to prepare a novel adsorbent, biochar-supported iron manganese bimetallic oxide. The results showed that the adsorption capacity of Cr(Ⅵ) dropped from 14.7 mg/g to 11.9 mg/g when pH increased from 3.00 to 9.00. Meanwhile, the equilibrium adsorption capacity increased with temperature when the temperature was below 35 ℃. The equilibrium isotherm was well described by the Langmuir equation with a theoretical maximum adsorption capacity of 45.391 3 mg/g. The kinetic data were well fitted with the pseudo-second-order model. This study suggested that the biochar-supported iron manganese bimetallic oxide could be a potential solution for Cr(Ⅵ) removal from water.
作者
王莉
徐晓珍
郑晓青
韦安磊
WANG Li;XU Xiao-zhen;ZHENG Xiao-qing;WEI An-lei(Institute of Architecture,Xianyang Vocational Technical College,Xianyang 7121000,China;College of Urban&Environmental Sciences,Northwest University,Xi’an 710127,China)
出处
《化工管理》
2022年第24期162-165,共4页
Chemical Engineering Management
基金
咸阳职业技术学院2020年科研基金项目(2020KJA02)。
关键词
铁锰氧化物
生物炭
六价铬
iron manganese bimetallic oxide
biochar
chromium
