光催化/光化学混合降解 1,2-二氯苯:动力学、热力学、运行成本、协同作用和矿化研究

IF 2.2 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of the Iranian Chemical Society Pub Date : 2024-06-05 DOI:10.1007/s13738-024-03044-4
Ali Reza Soleymani, Saeid Azimi, Azin Rahnama
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引用次数: 0

摘要

本研究采用配备水套的循环电流光反应器,研究了紫外线/二氧化钛和紫外线/H2O2 工艺对水介质中 1,2-二氯苯降解的综合影响。对各种因素(初始 pH 值、TiO2 用量、初始 H2O2 浓度、污染物浓度和温度)的评估有助于优化两种工艺的降解率和运行成本。在降解 50 mg/L 的 DCB 时,发现紫外线/二氧化钛的最佳操作条件为:pH = 3,[TiO2] = 30 mg/L,T = 25 °C;紫外线/二氧化硫的最佳操作条件为:pH = 3,[H2O2]0 = 350 mg/L,T = 25 °C。辐照 60 分钟后,UV/TiO2 和 UV/H2O2 过程的降解效率、假一阶速率常数和运行成本值分别为 98.9%、0.0771 min-1、11.6 美元/立方米和 96.3%、0.0573 min-1、11.8 美元/立方米。计算得出的活化能、焓变、熵变和标准吉布斯自由能等热力学参数分别为 21.78 (kJ/mol), 19.37 (kJ/mol), - 0.20 (kJ/mol K) 和 73.34 (kJ/mol at 25 °C);紫外线/二氧化钛过程为 7.62 (kJ/mol), 5.18 (kJ/mol), - 0.25 (kJ/mol K) 和 80.14 (kJ/mol at 25 °C)。这项研究还探讨了 13 种杂化情况,包括 UV/TiO2/H2O2 和 UV/H2O2/TiO2,并得出了显著的发现。值得注意的是,紫外线/二氧化钛(30 毫克/升)/二氧化氢(250 毫克/升)这一特定的杂化方案显示出显著的协同效应(29.5%)。污染物矿化评估结果令人信服,紫外线/二氧化钛(30 毫克/升)/二氧化硫(250 毫克/升)方案在 90 分钟后实现了约 85% 的矿化,显示了矿化过程中显著的协同效应(44%)。
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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Hybrid photocatalytic/photochemical degradation of 1,2-dichlorobenzene: kinetic, thermodynamic, operating cost, synergism and mineralization study

This study investigates the combined effects of UV/TiO2 and UV/H2O2 processes on the degradation of 1,2-dichlorobenzene in aqueous media, employing a recycled current photo-reactor equipped with a water jacket. Evaluation of various factors—initial pH, TiO2 dosage, initial H2O2 concentration, pollutant concentration, and temperature—contributed to the optimization of degradation rates and operational costs for both processes. For the degradation of 50 mg/L of DCB, the optimal operating conditions were found to be for UV/TiO2: pH = 3, [TiO2] = 30 mg/L and T = 25 °C, and for UV/H2O2: pH = 3, [H2O2]0 = 350 mg/L and T = 25 °C. After 60 min of irradiation time, the degradation efficiency, pseudo first order rate constant and operational cost value for the UV/TiO2 and UV/H2O2 processes were as 98.9%, 0.0771 min−1, 11.6 $/m3 and 96.3%, 0.0573 min−1, 11.8 $/m3 respectively. Also, thermodynamic parameters of activation energy, enthalpy change, entropy change and standard Gibbs free energy were calculated as 21.78 (kJ/mol), 19.37 (kJ/mol), − 0.20 (kJ/mol K) and 73.34 (kJ/mol at 25 °C) for UV/TiO2 process and 7.62 (kJ/mol), 5.18 (kJ/mol), − 0.25 (kJ/mol K) and 80.14 (kJ/mol at 25 °C) for UV/H2O2 process. The investigation also encompassed the exploration of 13 hybridization scenarios, including UV/TiO2/H2O2 and UV/H2O2/TiO2, revealing notable findings. Notably, a specific hybridization scenario, namely UV/TiO2 (30 mg/L)/H2O2(250 mg/L), demonstrated a significant synergistic effect (29.5%). Evaluating pollutant mineralization unveiled compelling results, with approximately 85% mineralization achieved after 90 min for the UV/TiO2(30 mg/L)/H2O2(250 mg/L) scenario, showcasing a remarkable synergism (44%) in the mineralization process.

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来源期刊
CiteScore
4.40
自引率
8.30%
发文量
230
审稿时长
5.6 months
期刊介绍: JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.
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