含钛高炉渣制备甲醛吸附剂的研究  

Research on Preparation of Formaldehyde Absorbent from Titaniferous Slag

作　　者：孔德彧[1] 管昊[2] 张倩[2] 孙利鹏[2] 杨蒙[2] 

机构地区：[1]上海交通大学燃烧与环境技术中心,上海200240 [2]南京师范大学,江苏南京210042

出　　处：《钢铁钒钛》2012年第1期40-43,共4页Iron Steel Vanadium Titanium

摘　　要：鉴于高炉渣中含有具有良好光催化降解作用的TiO2,且来源廉价广泛,因此研究如何高效合理地利用含钛高炉渣便成为必然。采用分析纯盐酸,在室温条件下对含钛高炉渣进行不同时间的酸浸处理,并进行比表面积、SEM扫描电镜、EDS能谱及甲醛吸附性能的测试。结果表明:酸浸处理后吸附剂表面为多孔结构,吸附剂比表面积由4.56 m2/g增大到105.35 m2/g,可用作甲醛的吸附剂;随酸浸时间的延长,吸附剂中Ti的含量由15.33%增加到最高31.39%,折算为TiO2的含量为39.6%,即酸浸处理可使含钛高炉渣中的TiO2富集。其中,酸浸时间为5 h的样品获得比表面积105.35 m2/g、TiO2含量34.7%,甲醛吸附能力达0.36 mg/g,是市场销售活性炭吸附能力(0.12 mg/g)的3倍。Due to high content of TiO2 with excellent photocatalytic degradation and wide source of availability at cheap cost,the BF titaniferous slag has drawn broad attention and interests focused on its efficient and rational utilization.The slag rich in TiO2 was treated by process of acid leaching with hydrochloric acid（analytical reagent） for different length of time at room temperature,and then various tests such as specific surface area（SSA）,scanning electron microscope（SEM）,energy dispersive spectrum（EDS） and formaldehyde absorbing tests for the resulting absorbent were performed.According to the test results,the absorbent samples having a porous structure on the surface exhibited a good ability to absorb formaldehyde with their specific surface area increasing from 4.56 m2/g up to 105.35 m2/g;Ti content in the absorbent increased from 15.33 % up to 31.39 %（39.6% as TiO2 content）,which implies that TiO2 in titaniferous slag can be enriched by acid leaching.In our research,the best result turned out to be the sample dealt with HCl for 5 hours with TiO2 content of 34.7 % and SSA of 105.35 m2/g.This sample is able to absorb 0.36 mg/g of HCHO,which is three times of activated carbon（0.12 mg/g） merchandised in the market.

关 键 词：含钛高炉渣 TIO2 甲醛吸附剂 以废治废 

分 类 号：X756[环境科学与工程—环境工程] TQ424[化学工程]