Article
Environmental Sciences
R. Gayathri, K. P. Gopinath, P. Senthil Kumar
Summary: In this study, ultrasonic assisted jujube seeds (UAJS) treated with sulphuric acid were experimented as adsorbents for removing Zn(II) and Pb(II) contaminated water. Results show that UAJS has higher adsorption capacity and is effective in treating industrial wastewater containing metal ions.
Article
Engineering, Environmental
Ataollah Babakhani, Majid Sartaj
Summary: This study successfully removed cadmium from aqueous solution using Cd(II)-imprinted chitosan hydrogel beads. The synthesis was confirmed through various analyses, and the adsorption process parameters and mechanisms were determined through batch adsorption tests and isotherm investigations.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Environmental Sciences
Avik Kumar Dhar, Humayra Akhter Himu, Maitry Bhattacharjee, Md Golam Mostufa, Fahmida Parvin
Summary: In recent decades, the release of pollutants into aquatic systems from increased industrial, agricultural, and domestic activities has created a need for reliable and environmentally friendly methods of removal. Bentonite clays have emerged as a cost-effective and sustainable solution in wastewater treatment, offering superior properties such as high adsorption capacity and chemical stability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Gobusaone Mokokwe, Moatlhodi Wise Letshwenyo
Summary: This study investigated the adsorptive removal of iron, nickel, and copper from aqueous solutions using Cement Brick Waste (CBW) as an adsorbent. The results showed that CBW had good adsorption capacities for these heavy metals, with both chemisorption and physisorption occurring during the process. The adsorbent was found to be heterogeneous, and the adsorption process followed the Pseudo Second Order kinetic model and the Freundlich isotherm model. However, the adsorption capacity of CBW decreased with each regeneration cycle.
PHYSICS AND CHEMISTRY OF THE EARTH
(2022)
Article
Water Resources
Jonas Bayuo
Summary: Utilizing unmodified Shea fruit shells as a biosorbent for Cd(II) removal from synthetic wastewater was found to be dependent on parameters such as pH, contact time, temperature, and initial concentration. The adsorption process was best represented by the Freundlich isotherm and was determined to be chemisorption. Thermodynamic analysis revealed that the process was endothermic and spontaneous.
APPLIED WATER SCIENCE
(2021)
Article
Chemistry, Physical
Lei Wang, Haris Muhammad, Minwang Laipan, Xiaohu Fan, Junkang Guo, Yongtao Li
Summary: In this study, a new water remediation technique using an organic-inorganic composite was developed for the removal of Cr(VI) and Mo(VI). The composite showed high adsorption capacities and efficiency, following the Freundlich and Langmuir isotherm models.
APPLIED CLAY SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Basel Al-Saida, Arwa Sandouqa, Reyad A. Shawabkeh, Ibnelwaleed Hussein
Summary: This study focuses on utilizing nanosilica for the adsorption of Cd2+ and Cu2+ from water. The experimental results show that Cd2+ has a higher uptake than Cu2+ and the affinity for Cd2+ decreases with increasing Cu2+ equilibrium concentration. Theoretical interpretations and molecular dynamics simulations support the experimental data. This study provides important insights into the removal of heavy metals from water using nanosilica.
Article
Environmental Sciences
Rishav Garg, Rajni Garg, Md Amir Khan, Manjeet Bansal, Vinod Kumar Garg
Summary: This study successfully removes five heavy metal ions from simulated water using a biosynthesized silica-supported iron oxide nanocomposite. The nanocomposite exhibits excellent adsorption performance and can be utilized as an effective nano-adsorbent for the removal of heavy metal ions from water and wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Radhia Yous, Razika Khalladi, Hakima Cherifi
Summary: In this study, iron and cadmium were successfully eliminated from aqueous solutions simultaneously using Algerian Bentonite without any modification. The sorption mechanism and optimal conditions were investigated, with the pseudo second-order model fitting the experimental data well. Kinetic studies revealed that the process is controlled by film diffusion, followed by internal diffusion, with cadmium showing higher and faster sorption than iron. These results suggest that raw bentonite can be an efficient sorbent for heavy metals mixture.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Madhu N. Nimbalkar, Badekai Ramachandra Bhat
Summary: This study utilizes zirconium based metal-organic framework for adsorptive removal of methylene blue and heavy metals from water, and confirms its adsorption performance and structural characteristics through various analyses, indicating its potential application prospects in water treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Environmental Sciences
Saravanan Rajendran, A. K. Priya, P. Senthil Kumar, Tuan K. A. Hoang, Karthikeyan Sekar, Kar Yeen Chong, Kuan Shiong Khoo, Hui Suan Ng, Pau Loke Show
Summary: This review quantitatively describes the viability of nano-adsorbent processing in wastewater detoxification by extracting heavy metal ions. It comprehensively evaluates the impact of nano-adsorbent functionalities on essential attributes and analyzes their limited resistance to adsorb some heavy metal ions. The study investigates experimental variables and separate models to understand the mechanism behind adsorption. The review highlights the different nano-based techniques and their potential applications in environmental remediation.
Article
Materials Science, Multidisciplinary
Paul Martin, Gildas Guillemot, Christopher A. Hareland, Peter W. Voorhees, Charles-Andre Gandin
Summary: A generalized model for the kinetics of a dendrite tip with a non-equilibrium interface is proposed for multicomponent alloys. The model takes into account the full coupling with thermodynamic databases to consider the effects of non-dilute non-ideal solutions, as well as a full diffusion matrix in the liquid phase. The study reveals substantial deviations from existing theories in the dendrite tip kinetics, especially in the absence of solute drag.
Article
Environmental Sciences
Yingya Wang, Hanbing Zhang, Muhammad Yaseen, Zhangfa Tong, Ninghua Chen, Huazhen Shi
Summary: Organic modification of magnetic alkaline Ca-bentonite resulted in the preparation of a film material with magnetic separation ability and enhanced removal performance for heavy metal cations. The modified material exhibited higher adsorption capacity for heavy metal ions and could be efficiently recycled with minimal decrease in adsorption capacity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Review
Biochemistry & Molecular Biology
Elie Meez, Abbas Rahdar, George Z. Kyzas
Summary: The threat of heavy metal accumulation in wastewater has been increasing in recent years, leading environmental agencies to focus on regulations to manage and control this issue. Scientific studies have been exploring suitable materials and techniques for wastewater purification, with sawdust showing promising potential as an effective solution. Factors such as pH and contact time play a significant role in the adsorption process of heavy metals into sawdust, which has been found to follow chemisorption mechanisms.
Article
Chemistry, Physical
Haya A. Abubshait, Ahmed A. Farag, Mohamed A. El-Raouf, Nabel A. Negm, Eslam A. Mohamed
Summary: This study focused on the removal of Cu2+ and Pb2+ metal ions from aqueous solution using modified graphene oxide-thiosemicarbazide (mGO-TSC) nanocomposite. The results showed that immersion time and adsorbent amount significantly influenced the adsorption efficiency, while initial metal ion concentration and pH of the medium also played important roles. Adsorption followed Freundlich adsorption isotherms and pseudo-second-order kinetic model through inter-particle diffusion mechanism. The modified adsorbent (mGO-TSC) exhibited effective reusability for multiple rounds with high adsorption efficiency for both Cu2+ and Pb2+.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Review
Energy & Fuels
Asokogene Oluwadayo Francis, Muhammad Abbas Ahmad Zaini, Idris Misau Muhammad, Surajudeen Abdulsalam, Usman Aliyu El-Nafaty
Summary: This paper aims to highlight the latest trends in chitosan preparation and modification, as well as the enhancement of its adsorptive properties and future directions. The mechanisms of adsorption by chitosan derivatives and methods for regenerating spent adsorbents are also discussed. The study found that chitosan modified with activated carbon showed better adsorption capacity for heavy metals, while chitosan modified with activated neem leaves showed better adsorption capacity for dyes.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Review
Toxicology
Lawal Sirajo, Muhammad Abbas Ahmad Zaini
Summary: Lignocellulosic wastes can be used as low-cost feedstock for producing high surface area activated carbon through phosphoric acid activation, which results in porous textures and high adsorption capacities for various pollutants. This process offers high carbon yield, low energy cost, exceptional removal performance, and less environmental impacts.
Article
Chemistry, Physical
Nawal Hasin Mohamed Omar, Muhammad Abbas Ahmad Zaini
Summary: This study aimed to evaluate the adsorption characteristics of beta-cyclodextrin chars. Both chars were characterized and their applicability in malachite green adsorption was studied. The results showed that hydrochar exhibited a better adsorption capacity.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Editorial Material
Chemistry, Physical
Aiman Hakim Supee, Muhammad Abbas Ahmad Zaini
Summary: The consumption of coffee products leads to a significant amount of coffee by-products, which were previously considered waste but are now being utilized as a precursor for low-cost activated carbon. Various activation strategies have been employed to synthesize coffee waste activated carbons, and their potential for removing organic and inorganic pollutants from aqueous solutions has been demonstrated.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Review
Entomology
Fadina Amran, Muhammad Abbas Ahmad Zaini
Summary: There has been a growing interest in non-honey products of stingless bees due to their high medicinal and therapeutic properties. Propolis and bee bread, among others, are of great potential and market demand. They possess high nutritional values and medicinal properties.
JOURNAL OF APICULTURAL RESEARCH
(2023)
Article
Materials Science, Paper & Wood
Norulaina Alias, Muhammad Abbas Ahmad Zaini, Mohd Johari Kamaruddin
Summary: The interaction between microwave heating rate and dielectric properties of agricultural wastes is crucial in determining suitable microwave operating conditions. This study investigated the interaction between microwave heating rate and dielectric properties of castor shell, empty fruit bunch, and palm kernel shell. The results showed that the heating rate increased with the power intensity for all materials tested. The palm kernel shell exhibited a higher heating rate and loss tangent value compared to the other materials, indicating its effectiveness in microwave heating.
NORDIC PULP & PAPER RESEARCH JOURNAL
(2023)
Article
Engineering, Chemical
Sumaia Bugumaa Abubaker Alammari, Muhammad Abbas Ahmad Zaini
Summary: This study evaluates the thermal performance of nanofluids in an elliptical zigzag tube. The particle diameter and volume fraction of the nanofluids were quantitatively investigated, and the governing equations were solved using ANSYS. The results provide insights into the heat transfer characteristics of nanofluids in this specific tube geometry.
PARTICULATE SCIENCE AND TECHNOLOGY
(2023)
Review
Engineering, Chemical
Azrul Nurfaiz Mohd Faizal, Nicky Rahmana Putra, Muhammad Abbas Ahmad Zaini
Summary: Dye wastewater is a serious source of pollution, and adsorption is an effective removal technique. Utilizing agricultural and industrial residues can regenerate waste and recover dyes, aligning with the goals of sustainable development.
PARTICULATE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Eng Hock Pua, Azrul Nurfaiz Mohd Faizal, Sirajo Lawal, Muhammad Abbas Ahmad Zaini
Summary: This study aimed to evaluate the adsorptive characteristics and two-stage adsorber design of banana peel adsorbents for malachite green and methylene blue removal. The adsorbents were characterized for surface properties, functional groups, and morphology. Activated carbon and hydrochar activated carbon showed similar surface properties but different capacities for malachite green and methylene blue. The Langmuir model was used for a two-stage adsorber design to achieve high performance and minimum dosage of activated carbon.
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2023)
Article
Environmental Sciences
Asokogene Oluwadayo Francis, Otoikhian Shegun Kevin, Muhammad Abbas Ahmad Zaini
Summary: This study evaluated the characteristics of zinc chloride modified vitex doniana seed activated carbon (VDZnCl2) for the removal of methylene blue. The results showed that VDZnCl2 had high surface area, porous texture, and the ability to adsorb methylene blue. The adsorption process was physical and controlled by external diffusion. These findings suggest that VDZnCl2 has potential as an adsorbent substitute for dye wastewater treatment.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2023)
Article
Energy & Fuels
Pua Eng Hock, Azrul Nurfaiz Mohd Faizal, Lawal Sirajo, Muhammad Abbas Ahmad Zaini
Summary: This study aimed to evaluate the adsorptive properties of banana peel adsorbents, including chars, hydrochar, activated carbons, and hydrochar activated carbon. The adsorbents were characterized for their physical properties, functional groups, and morphology, and the adsorption experiments were conducted under varying contact time, concentrations, and temperatures. The hydrochar activated carbon exhibited a specific surface area of 877 m(2)/g, with a maximum dye capacity of 582 mg/g at an equilibrium concentration of 446 mg/L. The fragmented surface of hydrochar activated carbon allowed more dye molecules to adsorb, although its effective diffusion coefficient was smaller compared to other banana peel adsorbents. The Langmuir-Freundlich model fitted the equilibrium data well (R-2=0.988), and the kinetic followed the pseudo-second-order model (R2>0.914). There was only a slight increase in adsorption with increasing temperature, and regeneration using HCl was ineffective in restoring the adsorbents' performance.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Lawal Sirajo, Muhammad Abbas Ahmad Zaini
Summary: This study aimed to evaluate the removal of orthophosphate from water using iron-loaded adsorbents derived from coconut shells. The results showed that IC-CSA had the largest specific surface area and maximum orthophosphate removal, making it an effective adsorbent for reducing eutrophication in water.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Environmental Sciences
Aiman Hakim Supee, Muhammad Abbas Ahmad Zaini
Summary: This study presents the kinetics and thermodynamics of biomass pyrolysis. The results show that the pyrolysis process is complex, with different reaction models for different pyrolysis subdivisions. The study also finds that biomass pyrolysis is endothermic and non-spontaneous.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Review
Chemistry, Physical
Aiman Hakin Supee, Muhammad Abbas Ahmad Zaini
Summary: This article introduces the hydrothermal carbonization (HTC) technology and its applications in wastewater treatment. Hydrochar is used as an adsorbent to remove water pollutants, but due to its small pore structure and surface area, it often requires activation treatment. The article also analyzes the limitations of hydrochar in the activation process.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Article
Materials Science, Paper & Wood
Yeo Shi Hao, Norasikin Othman, Muhammad Abbas Ahmad Zaini
Summary: Waste newspaper, as a potential strategy, can be converted into activated carbon for its high carbon content. This paper summarizes recent advances in the production of activated carbon from waste newspaper and its applications in adsorption and wastewater treatment. The comparison of physicochemical properties using different chemical activators, especially sodium salts, to facilitate the adsorption of water pollutants was discussed. The waste newspaper-based activated carbon has high BET surface area and cost effectiveness, making it an economical alternative for mass production in wastewater treatment.
NORDIC PULP & PAPER RESEARCH JOURNAL
(2023)
