Article
Environmental Sciences
Pallavee Srivastava, Safaa A. Al-Obaidi, Gordon Webster, Andrew J. Weightman, Devin J. Sapsford
Summary: This study presents a novel approach for the treatment of dye-bearing effluent using a circular economy-inspired method. It utilizes the biogeochemical interaction between dye-bearing wastewater and hydrous ferric oxide (HFO) bearing sludges for the passive treatment without the need for power or reagents. The study demonstrates the reuse of HFO-rich waste sludges for the decolourisation and biodegradation of dyes in textile effluent. The results show that the HFO sludges can effectively remove dye from the effluent and facilitate the biodegradation process.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Michael Muzika, Nadav Genossar-Dan, Dana Fux, Shani Har Lavan, Uri Zamir, Illya Rozenberg, Patrick Hemberger, Joshua H. Baraban
Summary: Acrolein is a common pollutant that poses health concerns, but its generation processes are still not well understood. This study investigates the decomposition of acrolein at high temperatures and identifies reactive species produced during the early stages of the reaction.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Biotechnology & Applied Microbiology
Gill Gillenay Haciosmanoglu, Seval Genc, Zehra Semra Can
Summary: Ulexite, a natural boron mineral, was found to be an efficient adsorbent for methyl orange (MetO) removal from aqueous solutions. The adsorption process was exothermic, spontaneous and thermodynamically favorable, with a mechanism involving various bonding types. Reuse experiments showed a decrease in adsorbed amount of MetO per unit weight of ulexite after multiple cycles, indicating potential for high-efficiency adsorption.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Biotechnology & Applied Microbiology
Chengji Zhang, Qian Peng, Runhe Xuan, Yongming Zhang, Gang Xue, Weihua Sun
Summary: The study found that two inorganic intermediates, NH4+ and SO42-, can promote the biodegradation of AO7 dye. NH4+ gradually increased biochemical oxygen demand (BOD), while SO42- showed a positive effect at low concentration and a negative effect at high concentration. Additionally, the effects of the intermediates on aerobic microbial respiration rate were similar to BOD.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Environmental Sciences
Jaspreet Kaur, Gaurav Mudgal, Arvind Negi, Jeewan Tamang, Shambhawi Singh, Gajendra Bahadur Singh, K. Jagadeesh Chandra Bose, Sandip Debnath, Mohammad Ahmad Wadaan, Muhammad Farooq Khan, Janne Ruokolainen, Kavindra Kumar Kesari
Summary: The commercial processing of biomaterials produces wastewater containing azo dyes and hydrolyzed by-products. Current treatment methods lack selectivity and efficiency. Microbial-assisted methods, such as the use of Agrobacterium strain JAS1, have been identified as a potential solution for degrading azo dyes and their by-products.
Article
Environmental Sciences
Aditi Trivedi, Swathi Desireddy, Sabumon Pothanamkandathil Chacko
Summary: A mixed microbial consortium adapted from the activated sludge process was capable of simultaneous decolourization and mineralization under denitrifying conditions, even at high methyl orange concentrations. Decolourization process followed first-order kinetics, with better performance observed at alkaline pH levels.
Article
Chemistry, Multidisciplinary
Thi Hai Yen Doan, Van Long Dang, Thi Thuy Trang Truong, Thi Ngan Vu, Thanh Son Le, Thi Minh Thu Nguyen, Minh Ngoc Nguyen, Thu Thao Pham, Shin-ichi Yusa, Tien Duc Pham
Summary: Highly positively charged poly(vinyl benzyl trimethylammonium chloride) (PVBMA) was successfully synthesized with a yield of approximately 82%. The molecular weight (M-w) of PVBMA was determined to be 343.45 g mol(-1) and the molecular weight distribution (D) was 2.4 by H-1 NMR and SEC measurements. PVBMA was used as an effective agent for surface modification of α-Al2O3, significantly enhancing the adsorptive removal of acid orange G (AOG) at all pH values.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Engineering, Environmental
Ye Yuan, Wanxin Yin, Yutong Huang, Anqi Feng, Tianming Chen, Liang Qiao, Haoyi Cheng, Wenzong Liu, Zhaoxia Li, Cheng Ding, Fan Chen, Aijie Wang
Summary: The intermittent electric field stimulated reduction-oxidation coupled process can enhance the biodegradation of azo dyes. Weak intermittent electrostimulation can boost anaerobic cathodic reduction and micro-oxygen-assisted anodic oxidation, promoting the generation of organic compounds to drive biocathode decolorization. Compared to continuous electrostimulation, intermittent electrostimulation exhibits better electron transfer capability and creates a more favorable oxidation-reduction potential. Intermittent electrostimulation also enriches functional consortia with electroactivity and azo dye metabolism capabilities.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Huichao Zhang, Kaiqiang Zhang, Mei Gao, Zhongyi An, Chunxiao Tang, Xi Yan
Summary: The rotating algal biofilm (RAB) system shows promise for effectively treating wastewater with high concentrations of azo dyes, as it can achieve efficient degradation of acid orange 2. The degradation efficiency is higher under acidic and neutral conditions, and the biofilm in the RAB reactors can utilize the dye as a nitrogen source for its own growth, aiding in the degradation process.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Physical
Shi-Chao Ren, Wen-Xin Lv, Xing Yang, Jia-Lei Yan, Jun Xu, Fang-Xin Wang, Lin Hao, Huifang Chai, Zhichao Jin, Yonggui Robin Chi
Summary: A carbene-catalyzed reductive coupling reaction of carboxylic esters and substituted Hantzsch esters has been disclosed, which is promoted by visible light irradiation and allows for incorporation of sophisticated structures, including those found in medicines, into ketone molecules under mild conditions.
Article
Chemistry, Physical
R. Huszank, Gy Nagy, I. Rajta, A. M. Czegledi
Summary: The study found that methyl orange in aqueous solution can be efficiently decolorized in the applied proton energy range, and the efficiency of radiolysis depends on the proton energy. The concentration of radical scavenger also has an impact on the degradation of methyl orange, with higher concentration leading to more efficient degradation.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Chemistry, Physical
Huaijun Sun, Hao Zheng, Xiaohong Yang
Summary: The experimental results demonstrate that low-dose Fe-Si-B-P-C glassy powders can efficiently degrade Orange II solution in a short period of time at acidic pH value, with high repeatability. Additionally, increasing solution temperature and acidity can significantly enhance the degradation rate.
Article
Chemistry, Physical
Thomas Bechtold, Noemi Aguilo-Aguayo, Tung Pham
Summary: Disperse dyes are important colorants for dyeing polyester fibers, but their wastewater discharge poses an environmental burden. This study explores an alternative method of electrochemical dye reduction, and successfully demonstrates the cathodic reduction of dispersed organic dyes.
Article
Thermodynamics
Marian Leulescu, Ion Palarie, Andrei Rotaru, Anca Moanta, Nicoleta Cioatera, Mariana Popescu, Gabriela Iacobescu, Emilian Morintale, Mihaela Bojan, Maria Ciocilteu, Iulian Petrisor, Petre Rotaru
Summary: In this study, five spectral techniques were used to analyze Sunset Yellow and explore its morphology, structure, chemical composition, and optical properties. The study also discovered the interaction of Sunset Yellow with proteins and its antioxidant activity and phytotoxicity.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Agricultural Engineering
Jiawei Fan, Wei Li, Bing Zhang, Wenxin Shi, Piet N. L. Lens
Summary: This study shows that the removal efficiency of azo dyes by AGS increases at low salinity levels, but the microbial cell viability of AGS is negatively affected at high salinity levels, leading to a decrease in removal and nutrient removal efficiencies. The removal of AO7 is achieved through adsorption and biodegradation.
BIORESOURCE TECHNOLOGY
(2022)