Phosphotungstic Acid to Remarkably Enhance Fe(III)/peroxymonosulfate for the Ultrafast Removal of Organic Pollutants

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Water, Air, & Soil Pollution Pub Date : 2024-11-13 DOI:10.1007/s11270-024-07599-z

Cai-Wu Luo, Deng-Gao Huang

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Abstract

The heterogeneous photocatalyst could effectively enhance Fe(III)- activated peroxymonosulfate (PMS) to remove organic pollutants in wastewater, however, the homogeneous photocatalyst is little reported so far. In this work, the removal of organic pollutants in the Fe(III)/PMS system was developed under the both darkness and LED illumination, by the addition of phosphotungstic acid (HPW) as homogeneous photocatalyst. Important influencing factors were optimized in the both darkness and LED illumination, including Fe(III), PMS and HPW concentrations, and extra anions. The results showed that Rhodamine B removal by Fe(III)/PMS was significantly strengthened after introducing HPW. In addition, it maintained a wide pH range. The mechanism studies revealed that HPW enhancing Fe(III)/PMS achieved the physical behavior in the darkness, whereas the existence of radical and non-radical pathways were primarily contributed for removing organic pollutants by HPW boosting PMS under LED illumination. The different approaches could be easily achieved by simply switching between darkness and LED illumination. This study provided a new process for treating organic pollutants in wastewater.

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磷钨酸显著提高铁(III)/过氧单硫酸盐超快去除有机污染物的能力

异相光催化剂可以有效地提高Fe(III)-活化过氧单硫酸盐（PMS）去除废水中有机污染物的能力，但迄今为止，关于均相光催化剂的报道很少。在这项工作中，通过添加磷钨酸（HPW）作为均相光催化剂，在黑暗和 LED 照明条件下开发了铁(III)/PMS 系统去除有机污染物的方法。在黑暗和 LED 照明条件下，对重要的影响因素进行了优化，包括 Fe(III)、PMS 和 HPW 的浓度以及额外的阴离子。结果表明，引入 HPW 后，Fe(III)/PMS 对罗丹明 B 的去除率明显提高。此外，它还保持了较宽的 pH 值范围。机理研究表明，HPW 增强 Fe(III)/PMS 在黑暗条件下实现了物理行为，而在 LED 照明条件下，HPW 增强 PMS 去除有机污染物主要通过自由基和非自由基途径。只需在黑暗和 LED 照明之间简单切换，就能轻松实现不同的方法。这项研究提供了一种处理废水中有机污染物的新工艺。

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.