Mohammad Zahir Akbari, Yifeng Xu, Chuanzhou Liang, Zhikun Lu, Siyuan Shen, Lai Peng
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引用次数: 0
Abstract
This study aimed to accelerate photocatalytic treatment of sulfamethoxazole (SMX) and cefixime (CFM) and alleviate the toxicity of photocatalysis effluents to improve further biodegradability. An efficient and fast reactive photocatalyst (Fe2O3/ZnO@VC) was synthesized, characterized and applied for photocatalytic removal of the targeted compounds. Results further confirmed the complete removal of SMX (1 mgL-1) within 30-min photocatalytic treatment. Acidic condition favored SMX removal due to the formation of negative ions, which were attracted by the surface of the catalyst comprising positive charge in pH values below the point of zero charge. The ideal degradation environment for CFM (1 mgL-1) was at neutral pH, and 97.2±0.1% of CFM was degraded over 60-min. A quenching test revealed that superoxide radial (•O2−) and e− played a major role in the photocatalytic degradation of SMX, while hydroxyl radical (•OH) showed an identical effect during photocatalytic treatment of CFM. The degradation efficiency of SMX was marginally reduced in synthetic wastewater (SWW) and CFM in tap water (TW) due to the quenching effects of phosphates and carbonates anions in SWW and chloride ions in TW, respectively. As a result of the excellent mineralization properties of the photocatalyst, the photocatalysis effluents were highly detoxified, reaching 93.5±11.8% and 87.0±5.1% for SMX and CFM, respectively.
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.
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