自拟合纳米二氧化钛催化污水处理剂的研究与开发

doi:10.11962/1006-4990.2019-0047

Abstract

Abstract:

The by-prodnct dilute sulfuric from the production of TiO₂ by sulfuric acid was used to prepare Ti（SO₄）₂ solution reacted with titanian as raw material.The titanium sulfate solution was neutralized with alkaline printing and dyeing wastewater.Then the ultrafine nano-sized TiO₂ powders was self-fitted and obtained.The TiO₂ powders were used to catalyze,oxidize and decompose the organic material in sewage,and reduced the amount of hydrogen peroxide in the existing Fenton method by 70%.Using UV-photocatalytic oxidation,the amount of hydrogen peroxide was all replaced,the COD removal rate in sewage increased by 14.5% and reached 94.5%.The economical method of production of waste sulphuric acid from titanium dioxide for the treatment of printing and dyeing wastewater was developed,which was coupled with the redundant chemical resources and chemical energy of two related industries.Thus the goal of economicproduction of nano-sized titanium dioxide catalyst was achieved,the production cost of printing and dyeing wastewater treatment was reduced,and the effect was remarkable.

Key words: super oxidation, catalytic decomposition, sewage treatment, titanium dioxide

CLC Number:

TQ134.11

Gong Jiazhu,Lu Xiangfang,Wu Ninglan,Shao Guoxiong. Research and development of self-fitting nano-sized titanium dioxide catalytic wastewater treatment agent[J]. Inorganic Chemicals Industry, 2020, 52(5): 59-64.

Figures/Tables 18

References 15

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废水类型	pH	COD/ （mg·L^-1）	BOD₅/ （mg·L^-1）	ρ（SS）/ （mg·L^-1）	ρ（NH₃-N）/ （mg·L^-1）	色度/ 倍
退煮漂废水	10~13	1 900	800	200	—	—
染色废水	8~10	500	300	250	10	500
丝光废水	10~13	800	300	200	—	—
印花废水	8~10	1 000	400	250	10	400
设备冲洗废水	8~10	1 000	200	300	—	—
后整理废水	8~10	300	150	150	—	—
混合水废水	9~11	1 200	500	240	45	200

洗水检测/ mL	w（Fe）（TiO₂干基）/10^-6	w（Fe）（TiO₂干基）/10^-6	打浆浓度/ （g·L^-1）	密度/ （g·cm^-3）
≤10	≤30	≤80	350	1.64
0.1 mol/L高锰酸钾溶液	以单质铁计（金红石）	以单质铁计（锐钛型）	以TiO₂计

编号	主要组成/%			密度/ （g·cm^-3）
编号	w（H₂SO₄）	w（FeSO₄）	w[Ti（SO₄）₂]	密度/ （g·cm^-3）
1	20.75	9.08	1.08	1.260
2	20.07	9.46	1.51	1.265

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Research and development of self-fitting nano-sized titanium dioxide catalytic wastewater treatment agent

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