Article
Environmental Sciences
Andre Baldermann, Stephan Kaufhold, Reiner Dohrmann, Claudia Baldermann, Ilse Letofsky-Papst, Martin Dietzel
Summary: Nanoscale zero-valent iron (nZVI) based composites supported by clay mineral substrates show promise for the in-situ remediation of groundwater and soils contaminated with chlorinated hydrocarbons. The nZVI-B nanocomposite, with higher reactivity and efficiency for TCE removal compared to pure nZVI, demonstrates the potential for use in permeable reactive barriers for contaminated field sites while minimizing reduction of soil-bearing capacity.
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)
Article
Environmental Sciences
SeongChul Ryu, Gayathri Naidu, Hee Moon, Saravanamuthu Vigneswaran
Summary: The mesoporous silica material SBA-15 was synthesized via hydrothermal reaction and successfully modified with manganese loading and amine-grafting to enhance the adsorption capacity and selectivity for copper ions; although the adsorption capacities decreased after granulation, the GMN-SBA material showed good regeneration and separation performance in continuous fixed-bed column adsorption mode; the dynamic adsorption model with linear driving force approximation (LDFA) explained well the fixed-bed adsorption results, showing high affinity of copper towards GMN-SBA compared to other heavy metals in multi-component adsorption.
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
Environmental Sciences
Esmaeil Allahkarami, Ebrahim Allahkarami, Amirreza Azadmehr
Summary: The main aim of this research is to synthesize a schist/alginate composite adsorbent for the removal of heavy metals from waste streams. The developed adsorbent shows good adsorption capacity, kinetic fit, and thermodynamic properties. The reusability of the adsorbent is also satisfactory, making it a commercially attractive and green method.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Manpreet Kaur, Manpreet Kaur Ubhi, Jaspreet Kaur Grewal, Dhanwinder Singh
Summary: Nanocomposites of magnesium ferrite and bentonite clay with different mass ratios were successfully synthesized using a sol-gel auto-combustion method. The nanocomposites showed excellent magnetic and surface area properties, with the 1:0.05 (w/w) ratio being the most effective for heavy metal ion adsorption and photocatalytic degradation of para-nitrophenol.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Biochemistry & Molecular Biology
Amany Abdelnaby, Nabila M. Abdelaleem, Elham Elshewy, Ayman H. Mansour, Samar S. Ibrahim
Summary: This study evaluates the levels of hazardous metals lead and cadmium in milk and investigates the effectiveness of using natural materials like bentonite, date pit, and chitosan nanoparticles to remove these metals. The results show that these potential adsorbents have high sequestering ability and do not affect the nutritional properties of milk.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2022)
Article
Environmental Sciences
D. E. Aminy, B. Rusdiarso, M. Mudasir
Summary: In this study, commercial bentonite was modified with dithizone to enhance its selectivity and capacity for adsorption of Cd(II) ions. The modified adsorbent showed a 40% increase in adsorption capacity compared to the original, as confirmed by spectroscopy and diffraction analysis.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
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
Environmental Sciences
J. Singh, P. Sharma, V Mishra
Summary: In this study, an inexpensive and ecofriendly mould made from bentonite clay and Samne Ghat soil was used to remove heavy metals from water. The surface of the mould contained functional groups that facilitated the adsorption of metal ions, and the mould itself was thermally stable and negatively charged. The experimental results showed that the adsorbent surface achieved monolayer coverage, and a genetic algorithm provided high efficacy.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Gobusaone Mokokwe, Moatlhodi Wise Letshwenyo
Summary: This study investigated the adsorption of copper, iron, and nickel ions from an aqueous solution using Makoro granite clay brick waste through batch and fixed-bed column modes. The results showed that the waste material had good adsorption capacity and its efficiency was influenced by factors such as time and adsorbent dosage. The study also characterized the adsorbent's physical and chemical properties and microstructure.
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
Juan Qin, Sujuan Yuan, Changjin Ou, Zhipeng Liao, Jian Shi
Summary: Nanoscale magnesium oxide and activated carbon were successfully loaded onto tobermorite to form a new composite material (TOB@C@MgO). This composite material exhibited a large specific surface area and good sedimentation property, and effectively removed Cd2+, Cu2+, and Mn2+ from wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Xiantang Liu, Sen Yang, Peike Gu, Sai Liu, Gang Yang
Summary: The simulation of smectite nanoparticles indicates that edge surfaces are more efficient for adsorption compared to basal and interlayer surfaces, one-valent metal ions tend to cause excessive adsorption, and heavy metals prefer adsorption on edge surfaces.
APPLIED CLAY SCIENCE
(2021)
Article
Multidisciplinary Sciences
Zhang Ming, Hu Dongke, Pan Shaoyu, Chen Guozhou
Summary: Permeability tests using a flexible wall permeameter were conducted to investigate the impact of bentonite-HDTMA on the permeability of Loess, a potential lining material for solid waste landfills. The results revealed that compacted Loess from the middle and lower reaches of the Yellow River in China did not meet the required impermeability standards for landfill liners. However, the permeability of Loess mixed with more than 10% bentonite ratio was significantly lower than the acceptable limit. The addition of a small amount of HDTMA slightly increased the permeability of Loess, but a certain ratio of bentonite-HDTMA still ensured impermeability.
SCIENTIFIC REPORTS
(2023)
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
Energy & Fuels
Shi Hao Yeo, Muhammad Abbas Ahmad Zaini, Mohd Azizi Che Yunus
Summary: This study investigates the adsorption properties of biochars derived from banana pseudostem and palm kernel shell for methylene blue removal. The results show that biochar derived from banana pseudostem has a higher surface area and adsorption capacity compared to biochar derived from palm kernel shell. The adsorption of methylene blue onto the biochars is a monolayer adsorption for banana pseudostem biochar and a physisorption for palm kernel shell biochar.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(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)
