doi:10.16186/j.cnki.1673-9787.2019120083

Received:2019/12/15

Revised:2020/04/21

Published:2021/05/15

Optimization preparation of waste from iron modified lentinus edodes and itsadsorption for slight arsenic contaminated water

DENG Tiantian, LI Hansheng, GUO Zhenzhen, JIANG Peiwen, CHEN Na, DING Minghui

School of Environmental and Biological Engineering， Henan University of Engineering， Zhengzhou 451191 ，Henan， China

Abstract:In order to explore a more efficient and cheap adsorption method for slight arsenic contaminated water ，the waste of rich lentinus edodes with abundant sources and no secondary pollution was used as raw material for surface modification， and the optimal reaction conditions were obtained according to the single factor and response surface optimization experiment. Finally， the bacterial powder before and after modification and adsorption was characterized through the data fitting analysis of isothermal thermodynamics and adsorption kinetics. The results showed that， when the initial mass concentration of As(Ⅲ) was 200μg/L， adding 0.2 g of lentinus edodes waste modified by 2 mol/L FeCl₃ solution， the removal rate reached 96. 85% at pH=8. According to the response surface optimization experiment， when the modified concentration of FeCl₃ solution was 2. 51 mol/L， the dosage of bacterial powder was 0. 28 g， and the pH was 8.58 ， the removal of As(Ⅲ) by lentinus edodes waste could reach the best effect and meet the drinking water standard. Langmuir model and quasisecond order kinetic model could describe adsorption thermodynamics and kinetic process more accurately.

Key words:lentinus edodes waste;slight arsenic pollution;modification;adsorption

 铁改性香菇废弃物优化制备及其对微砷污染水的吸附_邓天天.pdf