重庆大学学报2017，Vol.40Issue(10)：99-107,9.DOI:10.11835/j.issn.1000-582X.2017.10.011
大豆秸秆生物炭对废水中Ni(Ⅱ)的吸附性能
Adsorption property of biochar from soybean straw for Ni(Ⅱ) in wastewater
摘要
Abstract
To remove Ni(Ⅱ) in wastewater more effectively and economically,soybean straw with low cost is chosen to make biochar to absorb Ni (Ⅱ).The effects of carbonization temperature,solution pH,adsorbent dosage,solution temperature and Cd(Ⅱ) concentration on the adsorption are investigated to find the optimal adsorption condition.A new method for removing heavy metal nickel is developed,and the adsorption kinetics and adsorption isotherm are studied.The experimental results show that the adsorption performance of the adsorbent is good,and when Ni (Ⅱ) concentration is 20 mg/L,carbonization temperature is 500 ℃,pH is 7,dosage is 0.2 g,temperature keeps at 25 C and the concentration of Cd (Ⅱ) is 0,the adsorption condition is the best.The adsorption reaction accords with the second-order kinetics equation.The adsorption isotherm accords with Langmuir model,and the saturated adsorption capacity is 14.38 mg/L at 25 C.Scanning electron microscope analysis shows that the pore structure of straw,the surface roughness and the specific surface area increase,which improves the adsorption performance.关键词
大豆秸秆/生物炭/吸附动力学/吸附等温线Key words
soybean straw/biochar/adsorption kinetics/adsorption isotherm分类
资源环境引用本文复制引用
向文英,李宁,邓国斌,谢冰冰..大豆秸秆生物炭对废水中Ni(Ⅱ)的吸附性能[J].重庆大学学报,2017,40(10):99-107,9.基金项目
高等学校学科创新引智计划资助(B13041).Supported by The Programme of Introducing Talents of Discipline to Universities(B13041). （B13041）
