Khrueakham Anurak, Masomboon Jidapa, Roongruang Jutamat, Sairiam Sermpong
Division of Research Administration and Academic Services, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus Sakon Nakhon 47000 Thailand.
Department of Environmental Science, Faculty of Science, Chulalongkorn University Bangkok 10330 Thailand
RSC Adv. 2021 May 17;11(29):17775-17788. doi: 10.1039/d1ra01871j. eCollection 2021 May 13.
The decolorization of Reactive Blue 19 (RB 19) wastewater by an ozonation membrane contactor and Fenton oxidation was studied. The aims of the study were to investigate the affecting parameters and to compare the performance of RB 19 decolorization by two different processes. The results showed that Fe and HO concentrations for Fenton oxidation and ozone concentration with different membranes for the membrane contacting process played the most important roles in RB 19 decolorization. The optimum conditions for RB 19 decolorization by Fenton oxidation were initial pH 3.0, 1.5 mM HO and 0.25 mM Fe; in contrast, the optimum conditions for the membrane contactor were initial pH 11 and 40 mg L ozone concentration. Under these conditions, the decolorization of RB 19 by the membrane contactor was almost completed and was higher than by Fenton and photo-Fenton oxidations for 90 min. The decolorizations of RB 19 by Fenton and photo-Fenton oxidations were constant after 30 min, but the decolorization of RB 19 by ozonation with a membrane contactor gradually increased ozone consumption until 90 min operation, which was higher than that of Fenton oxidations. The use of a PVDF-PAM membrane in the membrane contactor resulted in higher decolorization efficiency than a PVDF membrane. The results demonstrated a COD removal efficiency of 63% by an ozonation membrane contacting process using PVDF-PAM, which was lower than that of Fenton oxidation (73%), but resulted in higher BOD/COD and NO and SO releases. Under these conditions, the ozonation membrane contacting process showed the lowest electric energy consumption.
研究了臭氧膜接触器和芬顿氧化法对活性蓝19（RB 19）废水的脱色效果。该研究的目的是研究影响参数，并比较两种不同工艺对RB 19脱色的性能。结果表明，芬顿氧化法中的铁离子和过氧化氢浓度以及膜接触过程中不同膜的臭氧浓度对RB 19脱色起着最重要的作用。芬顿氧化法对RB 19脱色的最佳条件是初始pH值为3.0、过氧化氢浓度为1.5 mM、铁离子浓度为0.25 mM；相比之下，膜接触器的最佳条件是初始pH值为11、臭氧浓度为40 mg/L。在这些条件下，膜接触器对RB 19的脱色几乎完成，且在90分钟内高于芬顿氧化法和光芬顿氧化法。芬顿氧化法和光芬顿氧化法对RB 19的脱色在30分钟后保持恒定，但膜接触器臭氧氧化对RB 19的脱色在运行90分钟前逐渐增加，且臭氧消耗量高于芬顿氧化法。在膜接触器中使用聚偏氟乙烯-聚丙烯酰胺（PVDF-PAM）膜比聚偏氟乙烯（PVDF）膜具有更高的脱色效率。结果表明，使用PVDF-PAM的臭氧膜接触工艺的化学需氧量（COD）去除效率为63%，低于芬顿氧化法（73%），但导致更高的生化需氧量与化学需氧量比值（BOD/COD）以及更高的氮氧化物（NO）和硫酸盐（SO）释放量。在这些条件下，臭氧膜接触工艺的电能消耗最低。
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