摘要
为提高纳米零价铁对水体中镉污染的修复效果,通过液相化学还原法制备纳米零价铁颗粒,并用活性炭包覆,制备纳米铁炭复合材料。设计单因素和正交实验,探讨材料制备中的3个主要因素对材料降解水体中镉(Cd(II))的影响。结果表明:在炭铁比为0.2,硼氢化钠加料速率为32 m L/min,搅拌强度为1 000 r/min的条件下,材料对水体中Cd(II)的降解效果最好;实验表明纳米铁炭复合材料对Cd(II)的去除以纳米零价铁的化学还原过程为主,活性炭的物理吸附为辅。
To improve the cadmium removal effect in water by nanoscale zero-valentiron,a new composite material combined with nanoscale zero-valentiron was prepared by chemical reduction method in aqueous solutions and encapsulated by activated carbon. By conducting one-factor and orthogonal experiments,the paper discussed the influence of three main factors in preparation on the material＇s（ Cd（Ⅱ）） removing performance. Results showed that the removal of cadmium gained the best effect when preparing under the condition as follows： the carbon iron ratio was 0. 2,sodium borohydride charging rate was32 m L/min,and the condition of stirring intensity was 1 000 r/min. Experiment also showed that the removing process of（ Cd（ Ⅱ）） with nanoscale iron carbon composite material was based on the chemical reduction,and physical adsorption of active carbon was complementary.
出处
《环境工程》
CAS
CSCD
北大核心
2016年第10期65-69,共5页
Environmental Engineering
基金
国家自然科学基金(41272266)
关键词
液相化学还原法
纳米零价铁
活性炭
复合材料
CD(II)
去除性能
chemical reduction method in aqueous solution
nanoscale zero-valentiron
activated carbon
composite materials
Cd（Ⅱ）
removing performance
