Performance evaluation of in situ Fenton-mediated photocatalysis of industrial dye effluent with enhanced TiO2 nanoparticle

IF 2.1 4区 环境科学与生态学 Q2 ENGINEERING, CIVIL
J. A. Oyetade, A. Hilonga, Revocatus Lazaro Machunda
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引用次数: 0

Abstract

Effluents resulting from the frequent use of industrial azo dyes in textile operations have posed great toxicological impacts on man and the environment. The limitations of conventional treatment infrastructure necessitate the use of rapid Fenton-mediated catalytic systematic process to tackle the attendant treatment limitations. The study applied in situ Fenton-mediation process with constructed low power UV-LED reactor for rapid catalytic treatment of dye-laden effluent using enhanced acid and alkali TiO2-nanoparticles (Nps) (1–5%, i.e. 1–5 M) at definite experimental conditions, respectively. A comprehensive instrumental study was done to access the morphological, functional and elemental constituents of these nanocatalysts. The performance of the respective catalyst was evaluated using methylene blue (MB) dye at definite experimental conditions of pH, dosage, concentration and irradiation time. The results revealed a mesoporous structural nanocatalyst with increasing surface area after enhanced modification. The optimal experimental conditions of pH and concentration were recorded as 5 and 10 mg/L, respectively. While the most efficient nanocatalyst was 3 wt% alkali-modified TiO2 (3% Ak-TiO2) having a degradation efficiency of 89.15% at 90 min of irradiation using 50 mg dosage in contrast to higher irradiation time and catalyst dosage for other catalysts.
增强TiO2纳米颗粒原位fenton光催化工业染料废水的性能评价
工业偶氮染料在纺织生产中频繁使用所产生的废水对人类和环境造成了巨大的毒理学影响。传统处理基础设施的局限性需要使用快速芬顿介导的催化系统过程来解决随之而来的处理限制。本研究利用自制的低功率紫外- led反应器原位Fenton-mediation工艺,在一定的实验条件下,分别采用1-5%的增强型酸、碱tio2纳米颗粒(Nps)(即1-5 M)快速催化处理含染料废水。对这些纳米催化剂的形态、功能和元素成分进行了全面的仪器研究。以亚甲基蓝(MB)染料为实验材料,在一定的pH、剂量、浓度和照射时间条件下,对催化剂的性能进行了评价。结果表明,经强化改性后的介孔结构纳米催化剂比表面积增大。pH和浓度分别为5 mg/L和10 mg/L。而最有效的纳米催化剂是3 wt%碱改性TiO2 (3% Ak-TiO2),在50 mg剂量下照射90 min时,降解效率为89.15%,而其他催化剂的照射时间和催化剂用量更高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.10
自引率
21.10%
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0
审稿时长
20 weeks
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