摘要
通过磨粉搅拌震荡的方式将干猪粪与秸秆原料粉末按5:1的质量比混合,采用0.8 mol/L的KOH溶液和氮气一同作用的物理化学活化法来进行制备复合活性炭,并用于吸附溶液中的Cr^(6+)实验。结果表明,以1:5的浸渍比在活化剂中浸泡18 h,再在管式炉内以15℃/min的速度提升温度至600℃热解60 min,于该条件下制得的复合炭活性效果良好,其碘吸附值、比表面积分别为598.3 mg/g和273.6 m^2/g,较之商品活性炭略有不及;成孔以中孔为主,平均孔径为5.149 nm。当100 m L初始质量浓度为50 mg/L的Cr^(6+)溶液调节p H为2时,向其中投加0.5 g复合活性炭并恒温震荡90 min时吸附效果最好,在此条件下Cr^(6+)的去除率可达99.8%。
Composite activated carbon was prepared by mixing pig manure and straw raw material powder through grind, stir and shock, and the mass ratio of them was 5：1, then through physical-chemical activation method by 0.8 mol/L KOH solution and nitrogen. The prepared composite activated carbon was used to adsorb Cr6＋ in the solution. The result showed that, the prepared composite activated carbon had good characters when soaking for 18 h with 1：5 of impregnation ratio firstly, then pyrolyzing 60 min in tube furnace with 15 ℃/min of beating rate to 600 ℃. The iodine adsorption value and surface area of activated carbon were 598.3 mg/g and 273.6 m2/g respectively, which was slight less than commercial activated carbon. The main pore was mesopore, the average pore size was 5.149 nm. The best.adsorbent conditions were as follows： adsorption time was 90 min, initial mass concentration of Cr6＋was 50mg/L, activated carbon dosage was 0.5 g, pH of solution was 2. Under this condition the removal rate of Cr6＋ could achieve 99.8%.
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第9期67-71,共5页
Technology of Water Treatment
基金
江苏省靖江市科技创新项目(CDHK060001)
关键词
猪粪
秸秆
活性炭
氢氧化钾
pig manure
straw
activated carbon
potassium hydroxide
