摘要
以玉米秸秆和氯化铁为主要原料,利用热解法一步制备了生物炭负载纳米零价铁复合材料,并对复合材料进行了Raman、XRD光谱表征。将生物炭负载纳米零价铁用于废水中Se(Ⅵ)的去除,考察了生物炭负载纳米零价铁投加量、溶液pH值对Se(Ⅵ)去除的影响。结果表明:当投加量为1. 0 g/L时,Se(Ⅵ)的脱除率可以达到90%以上,且脱除率随pH值增大而降低。对生物炭负载纳米零价铁还原去除水溶液中Se(Ⅵ)的热力学、动力学性能进行了研究,结果表明:Langmuir模型能较好地描述复合材料对Se(Ⅵ)的吸附平衡,Se(Ⅵ)去除过程可用二级速率方程描述。
Using corn stalk and ferric chloride as main raw materials, the biochar-supported nanoscale zero-valent iron composite is synthesized by one-step pyrolysis and characterized by Raman spectrum and XRD. The composite is adopted to remove Se（VI） in wastewater, and the effects of dosage of bioehar-supported nano zero-valent iron, pH value of waste water on the removal rate of Se （ VI ） are investigated. The results show that with the dosage of 1.0 g/L, the removal rate of Se（ VI ） can reach above 90%, modal and the removal rate reduces with increasing of pH value. The thermodynanlies and kinetics of removing Se （ VI ） by reduction of bioehar supported nano zero-valent iron are studied, and the results indicate that the pattern of removal of Se （VI） with composite better matches with Langnmir model and the removal process can be described by a second order rate equation.
作者
吴晓毅
朱庆涛
郭启慧
李士凤
WU Xiaoyi;ZHU Qingtao;GUO Qihui;LI Shying(College of Chemical Engineering,Shenyang University of Chemical Technology-,Shenyang 10142,China)
出处
《能源化工》
2018年第3期46-50,共5页
Energy Chemical Industry
基金
沈阳市科技计划项目(18-013-0-28)
辽宁省高等学校基本科研项目(LQ2017012)
关键词
热解
生物炭
纳米零价铁
硒脱除
pyrolysis
bioehar
nano zero valent iron
removal of selenate
