Article
Engineering, Environmental
Qian Zhang, Yuyang Wang, Mayada Jamal, Rui Wang, Qiuyang He, Faqian Sun, Hongjun Lin, Xiaomei Su
Summary: This study discovered that the resuscitated strain JF4 has high-efficient degradation capability of the refractory anthraquinone dye RB19. JF4 can effectively degrade RB19 over a broad range of pH values and NaCl concentrations. Under optimal conditions, JF4 efficiently degrades RB19 at high concentrations and follows a first-order kinetic model. Enzyme activity analysis revealed the significance of lignin peroxidase in RB19 degradation. The degradation pathways of RB19 by JF4 were proposed based on metabolites and enzymes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Ai Zhang, Xinyuan Jiang, Qiancheng Wang, Siyu Hao, Dahai Zhu, Jie Wang, Ce Wang, Mingyan Liu
Summary: This study compares the performance of UVA/chlorination and ozonation in removing glucocorticoids and finds that ozonation is more effective. The degradation pathways are identified for both methods, and it is shown that ozonation is better in reducing toxicity.
Article
Multidisciplinary Sciences
Babatunde A. Koiki, Omotayo A. Arotiba
Summary: This work presents the sulphate radical assisted photoelectrocatalytic degradation of tetracycline using a visible light active fluorine-doped tin oxide - tungsten trioxide nanorods photoanode. The results show that the presence of sulphate radicals significantly enhances the degradation of tetracycline, with a high extent of degradation achieved within a short period of time. The FTO-WO3 NRs photoanode is stable and reusable, making it suitable for the decontamination of water polluted with pharmaceuticals.
Article
Engineering, Environmental
Marlon Caianelo, Caio Rodrigues-Silva, Milena Guedes Maniero, Vinicius Diniz, Mylena Spina, Jose Roberto Guimaraes
Summary: The study evaluated the ozonation as a technique to remove GAT, with higher efficiency at alkaline conditions reaching up to 99% removal rate. It was observed that ozone first attacked the carboxylic group of the GAT molecule, while at acidic conditions it targeted the piperazinyl ring. Antimicrobial activity was reduced most at alkaline conditions for test organisms like Escherichia coli and Bacillus subtilis, while the best condition to remove residual toxicity for marine bacteria V. fischeri was found to be acidic. Ozonation appeared to be an exciting process for removing GAT in aqueous media.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Liping Li
Summary: The study investigated the toxicity and transformation characteristics of triclosan ozonation and chlorination, revealing the generation of toxic chlorinated compounds during chlorination and the mitigation of genotoxicity with ozonation treatment. Chlorination led to a 30-fold increase in anti-estrogenic activity, while ozonation could reduce the toxicity of triclosan-containing water. Therefore, ozonation may be a more environmentally friendly and safe method for treating triclosan wastewater.
Article
Engineering, Environmental
Zhujun Luo, Jianbo Liao, Shaoyu Tang, Shuona Chen, Kun Wei, Chao Xu, Zhun Liu, Lei Xu, Junfeng Niu
Summary: In this study, the electrochemical oxidation of TCPP was investigated, which demonstrated effective elimination of TCPP by pseudo-first order kinetics. The degradation efficiency reached 98.4% with a corresponding reaction rate constant of 0.0502 min 1. Quenching experiments revealed that center dot OH played a vital role with a contribution rate of 91.3%. Environmental indicators significantly influenced the degradation efficiency, and six intermediates were generated through oxidation, dichlorination, and hydrolysis reactions. TCPP induced cell apoptosis of E. coli, but the electrochemical oxidation process effectively degraded and detoxified TCPP.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Nain Tara, Mazhar Iqbal, Fazal-e Habib, Qaiser Mahmood Khan, Samina Iqbal, Muhammad Afzal, Hans Brix
Summary: The study successfully degraded RB5 dye using a bacteria-augmented floating treatment wetlands system, revealing the non-toxicity of the metabolites produced. This method could be a promising option for azo dye treatment and may contribute to improving overall textile effluent cleanup processes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Venkata Sai Reddy Ramireddy, Rakshitha Kurakula, Padmanaban Velayudhaperumal Chellam, Anina James, Eric D. van Hullebusch
Summary: The present study analyzes the degraded products of three azo dyes and predicts their toxicity using in silico methods. The results suggest that the degradation products are toxic and may accumulate in the environment. Proper treatment of these products is crucial.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Ya-nan He, Lu-meng Chen, Liu Yu, Hong-yan Ma, Hu Qi, Zhi-xing Cao, Han Li, Run-chun Xu, Yang Ming, Tian Yin, Ding-kun Zhang
Summary: This study investigated the hydrolysates of aconitine and their mutual transformation relationship using theoretical quantum chemistry, UPLC-Q-TOF-MS, and other methods. The results showed that aconitine has three independent hydrolysis pathways, and the hydrolysates of different pathways cannot be transformed into each other. Pyroaconitine is a hydrolysate of aconitine, and its toxicity is lower than benzoylaconitine.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Agriculture, Multidisciplinary
Shan Wang, Chen Li, Jiayi Wang, Zhaohui Wu, Bing Bai, Jinlong Tian, Zhaoxia Wu
Summary: Ozone water treatment is an effective technology for degrading pesticide residues in vegetables. The study found that washing pak choi with 2.0 mg L-1 ozone water for 30 min resulted in significant degradation of malathion and carbosulfan contents.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2022)
Article
Engineering, Environmental
Sasikaladevi Rathinavelu, Sathyanarayana N. Gummadi, Indumathi M. Nambi
Summary: In this study, the electro-oxidation of representative antibiotics belonging to five different classes was investigated using a Ti/Sb-SnO2/PbO2 anode. The synthesized anode was characterized and shown to have favorable properties for efficient electro-oxidation. The study demonstrated that the electro-oxidation process effectively degraded the antibiotics, with a degradation rate of over 99%, and proposed a complete pathway for the oxidation of the antibiotics. The toxicity of the antibiotics was also evaluated, showing a decrease in toxicity with extended treatment time, ensuring safe discharge of the treated water.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Adi Zilberman, Igal Gozlan, Dror Avisar
Summary: The efficiency of direct and indirect ozonation in an advanced oxidation process (AOP) was evaluated for the removal of pharmaceutical residues in intentionally spiked deionized water. Both direct and indirect ozonation achieved removal rates ranging from 34% to 100% for the parent compounds. However, the study suggests that despite using accepted and affordable concentrations of ozone and radicals, the parent compounds were not fully degraded but transformed into 25 new intermediate products. These transformation products (TPs) were structurally similar to the parent compounds and exhibited similar persistence, stability, and toxicity. Some TPs were even more toxic than their parent compounds. Therefore, additional treatment is necessary to enhance the AOP for the degradation and removal of both parent compounds and their TPs to ensure safer release into the environment.
Article
Environmental Sciences
Jiale Liu, Lu Fan, Wenjun Yin, Shusheng Zhang, Xiaomei Su, Hongjun Lin, Haiying Yu, Zhenghai Jiang, Faqian Sun
Summary: This study investigated the genome analysis and azo dye Reactive Black 5 (RB5) degrading capability of a newly isolated strain, Shewanella sp. SR1. The analysis identified functional genes involved in dye degradation and mechanisms for adaptation to low-temperature and high-salinity conditions. The addition of co-substrates significantly enhanced RB5 decolorization efficiency. The metabolic pathways of RB5 degradation were deduced based on the metabolites and genes detected in the genome. The findings highlight the great potential of Shewanella sp. SR1 for bioremediation of wastewater contaminated with azo dyes.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Nan Huang, Wan-Ting Shao, Qi Wang, Wen-Long Wang, Qian-Yuan Wu, Hong-Ying Hu
Summary: This study investigated the degradation mechanisms and toxicity changes of Chloromethylisothiazolinone (CMIT) by Vacuum-Ultraviolet/Ultraviolet (VUV/UV) irradiation. The results showed that VUV/UV irradiation was more effective in degrading CMIT compared to sole UV photolysis.
Article
Engineering, Chemical
Pengwei Yan, Zhonglin Chen, Shuyu Wang, Yanchi Zhou, Jimin Shen, Shengxin Zhao, Lei Yuan, Weiqiang Wang, Xiaotong Xu, Xinwei Zhu, Jing Kang
Summary: This study investigated the generation mechanism of iodinated by-products during catalytic ozonation of iohexol, and evaluated the impact of various factors on their generation. The concentrations of iodinated by-products in actual water were relatively low, and the species with one iodide atom had significantly higher generation concentrations than those with more iodine atoms.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)