Article
Engineering, Multidisciplinary
Abeer A. Moneer, Nabila M. El-Mallah, Manal M. El-Sadaawy, Mohamed Khedawy, Mohamed S. H. Ramadan
Summary: Aluminum Electrocoagulation technique was utilized to efficiently remove two anionic dyes in a batch bi-polar system. The optimal conditions for higher removal percentage were identified, and pseudo-first-order kinetic model best fitted the data. Different isotherm models showed that Langmuir and Flory-Huggins adsorption isotherms were the most fitting. The studied thermodynamic parameters clarified that the process is spontaneous and endothermic.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Farshad Feyzbar-Khalkhali-Nejad, Ehsan Hassani, Ali Rashti, Tae-Sik Oh
Summary: Carbon monoxide is a crucial feedstock in the petrochemical industry for producing various chemicals. Adsorption, as a cost-effective method of separation, can achieve high CO adsorption capacity and selectivity with the right choice of adsorbent. Various techniques like FTIR, mass spectroscopy, and microcalorimetry are used for data collection in adsorption studies.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Fatemeh Rajaei, Ensiyeh Taheri, Sousan Hadi, Ali Fatehizadeh, Mohammad Mehdi Amin, Nasim Rafei, Saeid Fadaei, Tejraj M. Aminabhavi
Summary: The application of alternating current in electrocoagulation and activation of persulfate (AEC-PS) was evaluated for effective removal of humic acid (HA) from aqueous solution. The highest HA removal efficiency obtained was 99.4% under specific conditions, with factors like pH, reaction time, and current density influencing the process. Radical scavenger tests indicated that both center·OH and SO4 center·- radicals played a significant role in HA removal, with the latter contributing more effectively.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Physical
Andreia Zacchi Bazzarella, Lucas Destefani Paquini, Ueslei Giori Favero, Ruan de Oliveira Alves, Mario Alberto Simonato Altoe, Demetrius Profeti, Luciene Paula Roberto Profeti
Summary: In this study, the performance of Cu2+-bentonite clay as an alternative adsorbent for ethylenethiourea removal from aqueous solution was evaluated, showing that the adsorption process was spontaneous and exothermic, with a slight dependence on temperature.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Lina Ramirez Arenas, Philippe Le Coustumer, Stephan Ramseier Gentile, Stephane Zimmermann, Serge Stoll
Summary: The presence of nanoparticles in drinking water raises concerns about their potential risks to human health and the efficacy of water treatment plants in removing them. This study examines the efficiency of granular activated carbon (GAC) in removing CeO2 nanoparticles. The results show that GAC has a good affinity for nanoparticles, with higher adsorption capacity and removal efficiency in lake water compared to ultrapure water. The adsorption mechanism is mainly controlled by electrostatic attractions, and mass transfer processes play a role in the removal of nanoparticles in lake water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Mahsa Payami Shabestar, Mohammad Reza Alavi Moghaddam, Elnaz Karamati-Niaragh
Summary: This study evaluated the energy and electrode consumption for AR18 removal in an electrocoagulation system using AC and DC. Results showed that using Fe electrodes and DC had a more significant removal efficiency and lower operating costs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Candelaria Tejada-Tovar, Angel Villabona-Ortiz, Angel Dario Gonzalez-Delgado
Summary: This study evaluated the effective adsorption of nitrate ions using bioadsorbents prepared from yam skins. Results showed promising adsorption capacities for nitrate anions, with the carbon synthesized from yam skins and modified with ammonium chloride exhibiting remarkable behavior compared to commercial carbon and NH4Cl-modified yam skins.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Environmental
Narasamma Nippatlapalli, Ambika Selvaraj
Summary: This study investigated the removal of refractory long chain perflourodecanoic acid using the electrocoagulation technique. The results showed that with Fe-Al-Fe-Al hybrid electrode system in a bipolar series connection, a removal efficiency of 99.96% of PFDA could be achieved with low energy consumption. The oxidation effect on PFDA and the generation of various intermediates were also observed. The performance of Fe-Al-Fe-Al on PFDA removal was verified by zeta potential and SEM-EDX analysis.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Review
Environmental Sciences
Shraddha Pai, M. Srinivas Kini, Raja Selvaraj
Summary: Hydroxyapatite is an efficient adsorbent for dye removal, especially when modified to enhance removal efficiency. Nanocomposites of hydroxyapatite show high adsorption capacities, with comprehensive studies on adsorption mechanisms and thermodynamics.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Tahereh Jasemizad, Lokesh P. Padhye
Summary: Hexazinone degradation was significantly enhanced under UVC irradiation with the presence of H2O2, and the degradation rate increased with higher H2O2 dosage, UV fluence, and contact time in the UV/H2O2 process. Furthermore, hexazinone was effectively adsorbed by coconut shell-based granular activated carbon through pi-pi electron donor-acceptor interactions, following the Freundlich model and pseudo-second-order reaction. This study provided valuable insights for the removal of hexazinone in wastewater treatment processes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Betul Tuba Gemici, Handan Ucun Ozel, Halil Baris Ozel
Summary: In this study, the removal of methylene blue dye using forest wastes, specifically white willow and weeping willow, through the adsorption method was investigated. The study determined the optimal adsorption conditions, the most suitable kinetic model, and the thermodynamic feasibility of the biosorption process. The results showed that both adsorbents are highly effective in removing methylene blue.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
M. H. Omidi, M. H. Ahmadi Azqhandi, B. Ghalami-Choobar
Summary: In this study, a nanocomposite material consisting of reduced graphene oxide, nickel-aluminum layered double hydroxide, and poly acrylic acid was used to remove tetracycline from water. The nanocomposite showed high removal efficiency and adsorption capacity, surpassing previously reported adsorbents.
Review
Environmental Sciences
K. Naseem, Q. Imran, M. Z. Ur Rehman, M. H. Tahir, J. Najeeb
Summary: This review article discusses the adsorptive characteristics of neem biomass for the removal of heavy metal ions and dyes from water. Neem biomass, with its availability and various functional groups, is able to extract heavy metal ions and dyes from water through electrostatic interactions. Factors such as pH, adsorbate concentration, adsorbent dosage, contact time, particle size, and temperature also affect the adsorptive capacity of the biomass. Neem biomass shows affinity to Langmuir and Freundlich isotherm models and follows pseudo-second-order kinetics. The article also suggests that the adsorptive potential of neem biomass can be enhanced through chemical modification.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Haci Baykara, Maria de Lourdes Mendoza Solorzano, Jose Javier Delgado Echeverria, Mauricio H. Cornejo, Clotario V. Tapia-Bastidas
Summary: This study tested the performance of an Ecuadorian zeolite-based geopolymer in removing copper ions from aqueous solutions. The results showed that the geopolymer has high adsorption capacity and competitiveness in this aspect.
ROYAL SOCIETY OPEN SCIENCE
(2022)
Article
Environmental Sciences
Saptarshi Ghosh, Manoranjan Sahu
Summary: The rise of the polymer industry has led to the leaching of phthalate esters into the environment, posing a potential threat to living organisms and ecosystems. This study focuses on developing cost-effective adsorbents, specifically biochar derived from peanut hulls, for removing these harmful compounds, using the model pollutant DMP. The different properties of biochars produced at various pyrolysis temperatures were examined to understand their adsorbent properties and performance. The results demonstrated that biochars exhibited chemisorption and multi-layered adsorption, with the highest efficiency observed for BC650 at 98.8%, followed by CAC at 98.6%. The study also identified the dominant mechanisms of adsorption for DMP onto porous biochar as H-bonding, p-p EDA interactions, and diffusion within the pore spaces. Overall, this research offers strategies for synthesizing biochar effectively for the removal of DMP from aqueous solutions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agricultural Engineering
Aarthi Pandiarajan, Ramakrishnan Kamaraj, Sudharshan Vasudevan, Subramanyan Vasudevan
BIORESOURCE TECHNOLOGY
(2018)
Article
Chemistry, Multidisciplinary
Ramakrishnan Kamaraj, Subramanyan Vasudevan
Review
Chemistry, Physical
Jun Yang, Pandian Ganesan, Akimitsu Ishihara, Naotoshi Nakashima
Article
Chemistry, Physical
Arumugam Sivanantham, Pandian Ganesan, Ajayan Vinu, Sangaraju Shanmugam
Article
Chemistry, Multidisciplinary
Ramakrishnan Kamaraj, Noel Nesakumar, Subramanyan Vasudevan
Correction
Chemistry, Physical
Pandian Ganesan, Aleksandar Staykov, Hiroaki Shu, Mitsugu Uejima, Naotoshi Nakashima
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ramakrishnan Kamaraj, Priyadharshini Aravind, Subramanyan Vasudevan
Summary: The nitrogen-doped graphene nanosheets (N-Gns) exhibited superior electrocatalytic activity and stability for the oxygen reduction reaction in acidic medium, making them suitable for use in the Electro Fenton process. By varying operating parameters, various herbicides were successfully degraded using this method.
Article
Chemistry, Physical
Radhakrishnan Venkatkarthick, Jingjing Niu, Assadawoot Srikhaow, Chakrit Sriprachuabwong, Subramanyan Vasudevan, Adisorn Tuantranont, Jiaqian Qin
Summary: The electrocatalytic activity of typical NCM hydroxide materials without lithium for oxygen evolution reaction (OER) was investigated. NCM-811 composite showed improved catalytic activity with the lowest onset potential and Tafel slope for better OER kinetics, while NCM-523 composite exhibited slightly higher values. This research could pave the way for developing affordable electrocatalytic materials with tunable compositions based on abundant multi-transition-metal hydroxides.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Environmental Sciences
Priyadharshini Aravind, Subramanyan Vasudevan
Summary: This study presents a self-reliable glucose driven-electro-Fenton system for efficient decontamination of 2,4-D herbicides without the need for external power supply. The performance and influence of different anode materials on the system and the degradation rate of 2,4-D were investigated. The findings pave the way for greener decontamination of herbicides with zero electrochemical energy consumption.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
J. Cheng, P. Ganesan, Z. Wang, M. Zhang, G. Zhang, N. Maeda, J. Matsuda, M. Yamauchi, B. Chi, N. Nakashima
Summary: The study focuses on the use of perovskite oxides, particularly La0.8Sr0.2Co0.8Fe0.2O3-δ (LSCF), for catalytic activity in the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). By doping different elements into the base perovskite oxide, enhanced OER/ORR activities were observed, with LSCF standing out as the most effective catalyst. Discussion on the catalyst's activity enhancement is based on spectroscopic, microscopic analyses and lattice oxygen transportation.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Physical
Pandian Ganesan, Aleksandar Staykov, Hiroaki Shu, Mitsugu Uejima, Naotoshi Nakashima
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Pinky Saikia, S. Vasudevan, Rupam J. Sarma, Rajib Lochan Goswamee
MATERIALS TODAY CHEMISTRY
(2018)
Article
Engineering, Environmental
Ramakrishnan Kamaraj, Aarthi Pandiarajan, Sudharshan Vasudevan, Subramanyan Vasudevan
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2018)