摘要
采用甲醛-Fenton氧化-吸附法联用处理兰炭废水,探讨影响处理效果的各种因素,并利用FTIR、SEM对甲醛法反应滤渣及催化剂进行表征。结果表明,当反应温度为90 ℃,n甲醛∶n挥发酚=5∶1,反应时间为90 min时,挥发酚去除率最大为39.8%,CODCr去除率为38%,所得固相产物为酚醛树脂;当H2O2浓度为22.2 g/L,反应时间为90 min时,CODCr去除率最大为49.5%,挥发酚去除率为28%,催化剂可进行回收利用;当活性炭投加量为14 g/100 mL,吸附时间为24 h,挥发酚去除率为64%,CODCr去除率为46 %,活性炭对挥发酚吸附以及CODCr去除等温线符合Freundlich方程,对挥发酚的吸附过程满足准一级动力学模型,而CODCr去除过程则更好地符合准二级动力学模型。
The method of Formaldehyde-Fenton oxidation-adsorption was used to treat semi-coking wastewater,and the influencing factors were studied in the paper.FTIR,SEM were used to indicate the catalysts and other products.The results showed that while the temperature was 90 ℃,the ratio of formaldehyde and volatile phenol was 5∶1,and the reaction time was 90 min,the removal rate of volatile phenol and CODCr were 39.8% and 38% separately,in this condition,bakelite was the solid product.When the concentration of H2O2 was 22.2 g/L,the reaction time was 90 min,the removal rate of volatile phenol and CODCr were 28% and 49.5% respectively,and the catalysts can be recycled.While the addition of activated carbon was 14 g/100mL,and the adsorption time was 24 h,the removal rate of volatile phenol and CODCr were 64% and 46% respectively.The adsorption process of activated carbon to volatile phenol and CODCr met Freundlich equation,and the adsorption process of volatile phenol settled for the first-order kinetics,but the adsorption process of CODCr accorded with second-order kinetics.
作者
白妮
王爱民
王金玺
亢玉红
马亚军
马向荣
Bai Ni;Wang Aimin;Wang Jinxi;Kang Yuhong;Ma Yajun;Ma Xiangrong(School of Chemistry and Chemical Engineering,Yulin University,Yulin,Shaanxi 719000;Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization,Yulin,Shaanxi 719000)
出处
《非金属矿》
CAS
CSCD
北大核心
2020年第1期79-83,共5页
Non-Metallic Mines
基金
国家自然科学基金(21663033)
陕西省科技资源共享平台项目(2019PT-18)
关键词
甲醛
FENTON氧化
吸附
兰炭废水
formaldehyde
fenton oxidation
adsorption
semi-coking wastewater
