Research on the removal of oxalic acid by modified and activated clay loaded Fe(Ⅱ) catalytic ozonation processes

doi:10.11894/1005-829x.2014.34(3).043

Abstract

Abstract:

Using modified and activated clay supported Fe(Ⅱ) as catalyst,the process of applying ozonation to the degradation of oxalic acid in wastewater has been investigated. The results show that the removing rate of oxalic acid is approximately 9% if the ozone is introduced directly,while the removing rate can achieve 51% by using modified and activated clay supported Fe(Ⅱ) as catalyst. The removing rate of oxalic acid increases non-linearly with the increase of the amount of the catalyst used,and the maximum reaction temperature is 40℃. When the initial concentration of oxalic acid ≥ 100 mg/L,the difference of oxalic acid removing rate is not obvious,but the removing rate increases with the increase of the initial pH of the solution. After the catalyst has been used for many times,the activity of about 70% of fresh catalyst goes stable gradually.

Key words: modified and activated clay, oxalic acid, catalytic ozonation, water treatment

摘要：

以Fe（Ⅱ）/改性活性白土为催化剂，考察了臭氧化降解废水中草酸的应用过程。结果表明，直接引入臭氧的草酸去除率约为9%，而使用Fe（Ⅱ）/改性活性白土催化剂则能够达到51%；草酸的去除率随着催化剂用量的增加而呈非线性增加，且在反应温度40℃附近存在最大值；草酸去除率当草酸初始质量浓度≥100 mg/L时差别不大，但随着溶液初始pH的增加而增加。多次使用后催化剂的活性渐趋稳定，约占新鲜催化剂的70%。

关键词: 改性活性白土, 草酸, 催化臭氧化, 水处理

CLC Number:

X703.1

Wang Longyao, Wang Lijuan, Wang Lan. Research on the removal of oxalic acid by modified and activated clay loaded Fe(Ⅱ) catalytic ozonation processes[J]. INDUSTRIAL WATER TREATMENT, 2014, 34(3): 43-46.

王龙耀, 王丽娟, 王岚. 改性活性白土负载Fe（Ⅱ）催化臭氧化去除草酸的研究[J]. 工业水处理, 2014, 34(3): 43-46.

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URL: https://www.iwt.cn/EN/10.11894/1005-829x.2014.34(3).043

https://www.iwt.cn/EN/Y2014/V34/I3/43

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