摘要
在pH=3、H_(2)O_(2)与硝基酚类化合物物质的量比为3∶1、Fe(Ⅲ)与硝基酚类化合物物质的量比为0.1∶1的条件下,以特征污染物硝基酚类化合物的降解率及TOC去除率为评价指标,对比了UV/O_(3)、UV/O_(3)/H_(2)O_(2)、UV/O_(3)/Fe(Ⅲ)3种臭氧光催化氧化工艺处理DDNP生产废水的效果。实验结果表明,反应时间1 h时经3种工艺处理后的DDNP生产废水出水的色度和TOC均可达到《兵器工业水污染物排放标准火工药剂》(GB 14470.2—2002)排放标准;UV/O_(3)体系中H_(2)O_(2)或Fe(Ⅲ)的加入对硝基酚类化合物的降解影响不大,而对TOC去除率具有明显的提升。实验条件下UV/O_(3)/Fe(Ⅲ)工艺的处理效果最优,反应时间1 h时其出水无色,TOC去除率为96%,m(BOD5)/m(COD)由0.06提升到0.46,且出水硝基酚类化合物满足GB 14470.2—2002排放标准。经计算,3种工艺的工艺效率分别为27%、35%、52%,更高的工艺效率意味着更低的工艺成本,因此UV/O_(3)/Fe(Ⅲ)工艺的经济性最优。
Under the conditions of pH=3,the molar ratio of H_(2)O_(2)to nitrophenols was 3∶1,and the molar ratio of Fe(Ⅲ)to nitrophenols was 0.1∶1,the degradation rate of characteristic pollutants nitrophenols and TOC removal rate as the evaluation index,the effects of UV/O_(3),UV/O_(3)/H_(2)O_(2)and UV/O_(3)/Fe(Ⅲ)photocatalytic oxidation processes on the treatment of DDNP production wastewater were compared.The experimental results showed that the chromaticity and TOC of the effluent of DDNP production wastewater treated by three processes at the reaction time of 1 h could meet the discharge standard of Discharge Standard for Water Pollutants from Ordnance Industry Initiating Explosive Material and Relative Composition(GB 14470.2—2002).The addition of H_(2)O_(2)or Fe(Ⅲ)in UV/O_(3)system had little effect on the degradation of nitrophenols,but significantly improved the removal rate of TOC.Under the experimental conditions,the UV/O_(3)/Fe(Ⅲ)process had the best treatment effect.When the reaction time was 1 h,the effluent was colorless,the removal rate of TOC was 96%,m(BOD5)/m(COD)increased from 0.06 to 0.46,and the nitrophenol compounds in the effluent also met the GB 14470.2—2002 emission standard.Through calculation,the process efficiency of the three processes was 27%,35%and 52%,respectively.Higher process efficiency meant lower process cost,so the economy of UV/O_(3)/Fe(Ⅲ)process was optimal.
作者
冯雷雷
FENG Leilei(School of Pharmaceutical and Chemical Industry,Yangling Vocational and Technical College,Xianyang 712100,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2023年第3期138-143,共6页
Industrial Water Treatment
