Article
Engineering, Environmental
Senem Yazici Guvenc, Gamze Varank
Summary: This study focuses on inert COD removal from leachate nanofiltration concentrate through Fenton oxidation and optimization of process parameters using response surface methodology. The results indicate that Fenton oxidation is an efficient and economical technology for improving the biological degradability of leachate nanofiltration concentrate and removing resistant organic pollutants.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Biotechnology & Applied Microbiology
Peng Gu, Yuyang Sun, Linghua Xue, Lina Zhu, Jun Shan, Xiaogang Li, Zhijiang Ni, Weizhen Zhang, Zheng Zheng
Summary: This study investigated the decomposition response of cyanobacterial blooms to various environmental factors and identified the optimized conditions for cyanobacteria decomposition. The intensity and order of environmental factors' influence were determined, contributing to the theoretical knowledge of predicting and analyzing cyanobacterial decomposition status in different external environments.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Abeer El Shahawy, Inas A. Ahmed, Mahmoud Nasr, Ahmed H. Ragab, Saedah R. Al-Mhyawi, Khalda M. A. Elamin
Summary: In this study, electrocoagulation was explored as an alternative method for treating Olive Mill Wastewater. Through Central Composite Experimental Design and Response Surface Methodology, the optimal conditions for COD removal were identified as current density of 15 mA/cm(2), pH of 4, and electrolysis time of 30 minutes. Under these conditions, the maximum COD removal ratio was 41% with an Al weight loss of 288.89 g/m(3).
Article
Environmental Sciences
Mohammad Naimi-joubani, Kobra Ayagh, Mahsa Tahergorabi, Mehdi Shirzad-Siboni, Jae-Kyu Yang
Summary: In this study, Ni-doped ZnO nanorods were synthesized and used as a sonocatalyst to remove diazinon. By optimizing the operational factors, the sonocatalytic degradation of diazinon was achieved, and the generated compounds were analyzed. The results demonstrated that the Ni-doped ZnO nanorods exhibited favorable sonocatalytic performance in the treatment of water and wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Abdolmotaleb Seidmohammadi, Yaser Vaziri, Abdollah Dargahi, Hassan Zolghadr Nasab
Summary: This study investigated a UV-assisted heterogeneous photo-Fenton process based on PAC/Fe3O4 catalyst for degrading MTZ. Experimental results confirmed the high efficiency and stability of this system in degrading MTZ.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Chemistry, Inorganic & Nuclear
Dan Li, Zepeng Zhao, Junliang Guo, Rujun Shen, Feigao Xu
Summary: Magnetic nano Fe3O4/CeO2/TiO2 composites were synthesized and their Fenton catalytic activity for the degradation of AO-7 dye under UV light was studied. The best activity was observed in the composite with a weight ratio of 1:1:1 (Fe1Ce1Ti1). The Fe1Ce1Ti1 composite showed good reusability and the .OH free radicals were mainly formed on its surface.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Dongdong Liu, Dengqian Chen, Lipeng Jiang, Zhengkai Hao, Rui Tan, Bowen Deng, Yaxin Wang, Yuhan Tian, Limei Chen, Boyin Jia
Summary: In this study, a novel electrode, CeO2@MoS2@GF, was synthesized and used to construct a heterogeneous Electro-Fenton (E-F) system for efficiently degrading sulfamethoxazole (SMX) in wastewater. The electrochemical performance and catalytic activity of the CeO2@MoS2@GF electrode were evaluated, and the E-F system achieved rapid SMX degradation and high TOC removal within a short time period.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Padmanabha Rao Amarachinta, Garima Sharma, Noufel Samed, Ananda Kumar Chettupalli, Madhusudhan Alle, Jin-Chul Kim
Summary: Central composite design was effectively used to optimize carvedilol-loaded ethosomal formulation for promising transdermal delivery system. The ethosomal gel can extend the anti-hypertensive effect of carvedilol, with better therapeutic potential than free carvedilol.
JOURNAL OF NANOBIOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Yong Chen, Yuangang Li, Ningdan Luo, Weike Shang, Shaosen Shi, Huajing Li, Yaodong Liang, Anning Zhou
Summary: The study developed a H2O2-free photo-Fenton process using BiVO4 as a semiconductor and Fe3+ as an additive to effectively degrade antibiotics. Comparisons between H2O2-free photo-Fenton and photocatalytic reactions showed the former had higher degradation rates under optimized conditions. The study deepened the understanding of mechanism and kinetics between photo-Fenton and photocatalytic reactions on the same catalyst, and highlighted the potential of H2O2-free photo-Fenton reactions on other semiconductors in treating wastewater with various antibiotics.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Farzaneh Mahmoudi, Chang Min Park, Jae-Jin Shim
Summary: In this study, a novel catalyst SFO/TCT-10 was synthesized to address the low Fe(II) regeneration performance in conventional Fenton system. The synthesized catalyst showed excellent efficiency in degrading tetracycline under sono-Fenton process, and the catalytic mechanism and possible degradation pathways were proposed.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Physical
Tahere Taghipour, Gholamreza Karimipour, Mehrorang Ghaedi, Arash Asfaram, Hamedreza Javadian, Mohammad Mehdi Sabzehmeidani, Hajir Karimi
Summary: In this research, a Cd-1,4-BDOAH(2) composite was synthesized with the assistance of ultrasound waves and loaded with Ag nano-particles to form the Ag:Cd-1,4-BDOAH(2) nano-photocatalyst for the degradation of brilliant green under visible light. The best operational conditions and degradation kinetics were successfully determined for the process, providing valuable insights into the mechanism of the PEF-PH degradation of BG.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Environmental
Vanessa Jurado-Davila, Keila Guerra Pacheco Nunes, Gabriel Pollo Oshiro, Liliana Amaral Feris
Summary: This study investigated the adsorption and oxidation of the antibiotic Marbofloxacin (MBX) individually and simultaneously. The results showed that the simultaneous process had higher efficiency in decreasing MBX concentration compared to individual processes, and it also reduced the formation of degradation products, suggesting potential environmental safety.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Charles B. Felix, Wei-Hsin Chen, Jo-Shu Chang, Young -Kwon Park, Samrand Saeidi, Gopalakrishnan Kumar
Summary: Oxidative torrefaction is recommended for improving the fuel properties of microalgae as solid biofuels. Temperature, time, and O2 concentration have significant effects on various parameters such as solid yield, energy yield, and higher heating value. The optimal conditions for this process are 200°C, 10.6 min, and 12% O2, resulting in an energy yield of 98.73% and an enhancement factor of 1.08. Furthermore, it shows higher reactivity under an air environment compared to inert torrefaction conditions.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jingmai Li, Shangying Li, Zhou Cao, Yunpu Zhao, Qizhao Wang, Hongfei Cheng
Summary: In this study, a CoFe2O4/kaolinite (CFO/K) composite photocatalyst was successfully synthesized, and tetracycline hydrochloride (TCH) was degraded through synergetic photo-Fenton reaction. Compared with pure CoFe2O4, CFO/K-40% exhibited higher photocatalytic degradation efficiency due to its larger specific surface area, abundant surface active sites, and higher photogenic electron hole pairs separation efficiency.
APPLIED CLAY SCIENCE
(2023)
Article
Engineering, Environmental
Jiahang Liu, Xiaoyang Li, Yingying Chu, Ling Yuan, Ruolin Lv, Weiming Zhang
Summary: The Fe(III)/H2O2 system showed high efficiency in remediation of tetracycline (TC) in water, even faster than the Fe(II)/H2O2 system. TC also initiated the degradation of other refractory pollutants. Complexation between Fe(III) and TC was observed with a stoichiometric ratio of 1:1 and electron transfer from TC to Fe(III) resulted in the production of Fe(II), which served as the initiator of the Fenton reaction. The main reactive species was found to be .center dot OH, facilitating the hydroxylation of TC and the reductive transformation of Fe(III) to Fe(II).
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Raju C. Asha, M. S. Priyanka Yadav, Mathava Kumar
ENVIRONMENTAL TECHNOLOGY
(2019)
Article
Environmental Sciences
P. Chinnaiyan, S. G. Thampi, M. Kumar, M. Balachandran
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2019)
Article
Engineering, Environmental
N. Neghi, Mathava Kumar, Danil Burkhalov
CHEMICAL ENGINEERING JOURNAL
(2019)
Review
Environmental Sciences
Minh Hang Do, Huu Hao Ngo, Wenshan Guo, Soon Woong Chang, Dinh Duc Nguyen, Yiwen Liu, Sunita Varjani, Mathava Kumar
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Engineering, Environmental
S. Manjunath, Ranu Singh Baghel, Mathava Kumar
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Md Rabiul Islam, Pratishtha Khurana, Pillalamarri Srikrishnarka, Ankit Nagar, Madhuri Jash, Shantha Kumar Jenifer, Mohd Azhardin Ganayee, Mathava Kumar, Thalappil Pradeep
Summary: Incorporating aminoclay-graphene oxide composites into reverse osmosis membranes has been shown to significantly improve desalination efficiency, with enhanced water permeation and salt rejection rates. Additionally, the membranes exhibit better stability and antifouling performance, suggesting energy-efficient desalination solutions.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Physical
Anwesha Mukhopadhyay, Binay Kumar Tripathy, Animesh Debnath, Mathava Kumar
Summary: CaFe2O4 nanoparticles were successfully synthesized and applied in enhancing the degradation efficiency of brilliant green dye in aqueous medium, with the degradation process optimized using response surface methodology. The addition of CaFe2O4 nanoparticles significantly improved the degradation efficiency in sono-catalytic system, while the presence of sodium chloride and sodium sulfate showed negative effects on degradation efficiency.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Neghi Nellaiappan, Gayathri Ravi, Mathava Kumar
Summary: The study aimed to compare the performance of composites GAC-TiO2 and CS-GO for removing antibiotic MET through adsorption and photocatalysis. Results showed that CS-GO had higher MET removal efficiency and adsorption capacity, making it suitable for continuous photocatalytic experiments.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2021)
Article
Engineering, Environmental
Sudeeptha Girijan, Mathava Kumar
Summary: This study examines the removal of the pharmaceutical antibiotic metronidazole (MNZ) from synthetic wastewater using biomass immobilized with powdered activated carbon (PAC) in an alginate matrix. The results show that the PAC-biomass beads can efficiently remove MNZ and NH3, with the bead loading having minimal impact on the removal efficiency.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2022)
Article
Engineering, Environmental
Onkar Sudhir Ekande, Mathava Kumar
Summary: A piezocatalytic heterojunction was synthesized by using sodium niobate (NaNbO3) and molybdenum disulfide sheets (MoS2). The removal of metronidazole (MET) using the MS(x)/NBO heterojunction was tested and the optimal condition was found to be MS(30)/NBO with 30 wt% of MS, resulting in a removal efficiency of 82.8%. The removal mechanism involved the generation of (OH)-O-center dot, electrocatalytic oxidation, and oxidation by holes in the depletion region.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Dinkar Parashar, Afrah Harafan, Gopal Achari, Mathava Kumar
Summary: This study investigated the adsorption of metronidazole (MNZ) and ciprofloxacin (CIP) as single and binary mixtures, revealing synergistic and antagonistic effects between the two antibiotics. The chitosan-modified graphene oxide adsorbent showed good performance and stability in removing both antibiotics, but repeated use resulted in decreased removal efficiency.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2023)
Article
Engineering, Environmental
Mohamed Abubakar Sithik Ali, Inigo Johnson, Mathava Kumar
Summary: The treatment of anaerobically digested distillery wastewater (ADWW) was examined using coagulation-flocculation (C-F) followed by a microalgal system. Optimum C-F conditions (FeCl3 approximately 3 g/L, PAC approximately 6 mg/L, pH approximately 5, dilution ratio approximately 4D) resulted in approximately 99.3%, 73.6%, and 58.3% removal of turbidity, color, and chemical oxygen demand (COD), respectively. Microalgal treatment of C-F-treated ADWW (CADWW) showed higher efficiency at 10D dilution and a photoperiod of 16 h:8 h light:dark cycle. The overall removal rates of COD, TOC, TN, melanoidin, and phenolics by this sequential process were 68%, 51%, 78%, 93%, and 90%, respectively. The harvested microalgae had a higher heating value of 28.66 MJ/kg and a lipid content of 24.2%. Sequential C-F and microalgal treatment can be an effective strategy for energy recovery during ADWW treatment.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2023)
Article
Chemistry, Physical
Onkar Sudhir Ekande, Mathava Kumar
Summary: Piezocatalytic removal of metronidazole (MET) was achieved using a heterojunction of graphitic carbon nitride (g-C3N4, GCN) and sodium niobate (NaNbO3) under ultrasonication. The optimized GCN(50)/NaNbO3 hetero-junction showed 87.2% MET removal within 160 min. The study identified a new pathway for the generation of reactive oxygen species (ROS) via the piezocatalytic heterojunction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Sonam Tantuvoy, Mathava Kumar, Indumathi Nambi
Summary: The investigation focused on the activation of persulfate by zirconium oxide under microwave irradiation for efficient degradation of methyl orange dye, achieving high removal rates and reduced toxicity under optimal conditions. The catalytic oxidation of MO was not affected by the presence of NaCl, indicating the potential of transition metal-based persulfate activation as an alternative for dye wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Engineering, Environmental
Onkar Sudhir Ekande, Mathava Kumar
Summary: The review discusses the application of PANI photocatalysts in the generation of S-scheme heterojunctions, highlighting their stability and potential applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)