Article
Environmental Sciences
Diana Ordonez, Andrea Valencia, A. H. M. Anwar Sadmani, Ni-Bin Chang
Summary: This study investigated the efficiency of two green sorption media (IFGEM-7 and AGEM-2) in removing selected per- and polyfluoroalkyl substances (PFAS) from water. The results showed that IFGEM-7 exhibited higher removal efficiency for PFOS compared to PFOA, and achieved high removal rates in column studies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
V Jayakumar, S. Govindaradjane, P. Senthil Kumar, N. Rajamohan, M. Rajasimman
Summary: This study demonstrated the feasibility of cadmium removal using green algae, Caulerpa scalpelliformis, under controlled environmental conditions. The optimized conditions for maximum cadmium uptake were determined to be pH 4.9, adsorbent mass 2.1 gL-1, and shaking speed 90 rpm. The biosorption process was found to be endothermic, with a maximum cadmium uptake of 111.11 mg g-1 achieved at optimal conditions.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Physical
V Jayakumar, S. Govindaradjane, M. Rajasimman
Summary: The sorption efficiency of marine green macro algae Caulerpa scalpelliformis for heavy metal zinc from aqueous and industrial wastewater was explored in this study. The characteristics of the sorbent prepared, optimum operating conditions, and equilibrium studies were investigated. Results showed that the sorption mechanism followed pseudo-second order kinetics, with the Langmuir isotherm model fitting the data well and showing a maximum uptake of 83.3 mg/g of zinc. Overall, the sorption of zinc on green biomass was found to be feasible, spontaneous, and endothermic.
SURFACES AND INTERFACES
(2021)
Article
Environmental Sciences
Cumali Yilmaz, Fuat Guzel
Summary: This study reports the removal performance of a low-cost and eco-friendly biochar from synthetic aqueous solution of copper, produced by facile thermal pyrolysis of wild herbs under anoxic conditions. The biochar exhibited low BET surface area, total pore volume, and mean pore size, with a maximum Cu(II) sorption capacity of 24.21 mg/g. The sorption system was analyzed using various kinetics and isotherm models, and thermodynamic parameters were computed for predicting the nature of the sorption system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Sivakumar Vigneshwaran, Palliyalil Sirajudheen, Perumal Karthikeyan, Sankaran Meenakshi
Summary: In this study, a sulfur tethered adsorbent of Tapioca peel (S@TP) biochar was successfully fabricated and utilized for the removal of organic dyes such as Malachite Green (MG) and Rhodamine B (RhB) from water, showing adsorption efficiency of 30.18 and 33.10 mg/g, respectively.
SURFACES AND INTERFACES
(2021)
Article
Environmental Sciences
Prarabdh Jain, Kedar Sahoo, Lenin Mahiya, Harsh Ojha, Harshita Trivedi, Avanish Singh, Manoj Kumar
Summary: A low cost polyvinyl alcohol-glutaraldehyde cross-linked hydrogel beads were successfully used for color removal from model industrial effluent containing Congo Red dye, achieving a high adsorption capacity and showing good reusability. Adsorption analysis revealed a multi-layer adsorption and pseudo second order kinetics, with fixed bed experiments best explained by the Thomas mathematical model. The studies demonstrated that external and internal mass diffusion were no longer rate limiting factors in the experiments.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Rana Malhas, Taiyeba Alamgir, Abrar Benhusain, Nadeen Alotaibi, Noor Alhaddad
Summary: In this study, the effects of various process parameters on the removal of oil from oily wastewater using Fe3O4 magnetic nanoparticles were investigated. The results showed that Fe3O4 nanoparticles are highly effective and reusable for oil removal.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Laishram Saya, W. Rameshwor Singh, Sunita Hooda
Summary: Given the large amount of harmful pharmaceuticals being released into the water stream, it is crucial to eradicate or reduce these chemicals to a minimum permissible limit. This study reports the fabrication of a magnetic guar gum graphene oxide nano-composite (mGG/GO NC) for the adsorption of ciprofloxacin from wastewater. Various techniques were used to characterize the guar gum and the nanocomposite, and it was found that the adsorption process followed the pseudo second order model and Langmuir isotherm model. The nanocomposite exhibited high adsorption capacity and recyclability, potentially due to a synergistic effect of multiple interactions in the adsorption mechanism.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Sandra Pioquinto Garcia, Luis Angel Garza Rodriguez, Diana Bustos Martinez, Felipe de Jesus Cerino Cordova, Eduardo Soto Regalado, Sylvain Giraudet, Nancy Elizabeth Davila Guzman
Summary: The study investigates the potential use of raw and expanded perlite as low-cost adsorbents for biogas purification, finding that expanded perlite has moderate adsorption capacity and follows Linear-Driving Force model in adsorption kinetics.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
R. Sangeetha Piriya, Rajamani M. Jayabalakrishnan, M. Maheswari, Kovilpillai Boomiraj, Sadish Oumabady
Summary: This study focused on the activation of coconut-based agricultural wastes as an alternative adsorbent for removing pollutants from industrial effluents. The activated carbon exhibited a high specific surface area and stability, showing significant dye adsorption for malachite green removal. The experimental data fit the Freundlich isotherm model well, indicating the potential of the carbon material as an alternative energy source.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yarui Zhou, Zilong Li, Lili Ji, Zhen Wang, Lu Cai, Jian Guo, Wendong Song, Yaning Wang, Alexander M. Piotrowski
Summary: Novel N-doped biochar (AKB) nanomaterials derived from raw kelp root exhibited excellent adsorption performance for cationic dye removal, with high specific surface area and abundant functional groups, suitable for dye wastewater treatment applications.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Iviwe Cwaita Arunachellan, Venkata Satyanarayana Sypu, Nazia Hassan Kera, Kriveshini Pillay, Arjun Maity
Summary: In this study, raw waste material from dried tree fibres was used as a source of natural carbon for the removal of copper ions in water. The carbonaceous adsorbent materials obtained showed increased surface areas and were successfully re-used in cyclocondensation and catalytic reduction reactions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Bao-Trong Dang, Obey Gotore, Rameshprabu Ramaraj, Yuwalee Unpaprom, Niwooti Whangchai, Xuan-Thanh Bui, Hideaki Maseda, Tomoaki Itayama
Summary: The biochar-inspired tertiary removal system effectively prevents the discharge of antibiotic residue from hospital wastewater treatment. The sorption performance of corncob biochar for different antibiotics was demonstrated, with varying sorption capacities and rates. It was found that the sorption capacity and binding strength parameters were related to pore size distribution of biochar, hydration effects, as well as the number of halogen atoms and functional groups in fluoroquinolones.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Environmental
Akbar Hojjati-Najafabadi, Parisa Nasr Esfahani, Fatemeh Davar, Tejraj M. Aminabhavi, Yasser Vasseghian
Summary: The performance of a nanocomposite adsorbent, comprised of nickel ferrite, zinc oxide, and alpha alumina nanoparticles on a graphene oxide substrate, was investigated for the removal of malachite green. The composites were characterized using various spectroscopy and imaging techniques, confirming the presence of particles and preservation of particle structure in COM4. The adsorption efficiency was examined under various conditions, showing maximum adsorption using the Langmuir model at pH 7 and ambient temperature. The adsorption mechanism was proposed to involve surface functional groups, electrostatic interactions, H-bonding, 7C-7C interactions, and permeation of dye molecules into the pores of the adsorbent. The adsorbent exhibited good performance for multiple cycles after washing with ethanol.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Olga Shvartseva, Tatiana Skripkina, Olga Gaskova, Ekaterina Podgorbunskikh
Summary: This study estimated the adsorption properties of peat for copper ion removal and quantitatively reproduced the modifications using instrumental analysis. Mechanical activation and mechanochemical activation led to significant changes in the interaction energy and acceptor properties. Copper adsorption was predominantly chemical and modifications increased the adsorption capacity of peat.