Article
Environmental Sciences
A. K. Priya, V Yogeshwaran, Saravanan Rajendran, Tuan K. A. Hoang, Matias Soto-Moscoso, Ayman A. Ghfar, Chinna Bathula
Summary: This study investigated the potential use of rice husk powder as a biosorbent for the removal of heavy metal ions from aqueous solutions. The experimental results showed that under optimized conditions, rice husk powder could effectively remove Cr, Pb, and Zn metal ions with high efficiency. The adsorption process followed the Temkin and D-R isotherm model and Elovich model for kinetic data. Based on the findings, rice husk powder could be considered as a low-cost and efficient adsorbent for heavy metal ion removal from industrial effluent.
Article
Environmental Sciences
Tolga Bahadir, Ismail Simsek, Sevket Tulun, Hakan Celebi
Summary: This study investigated the adsorption abilities and surface properties of tea waste, banana peels, almond shells, and eggshells for removing lead from water. The results showed that banana peels had the highest removal efficiency and the adsorption mechanism likely involved physical and cooperative adsorption processes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Guangyuan Chen, Tong Zhou, Meng Zhang, Zhongxiang Ding, Zhikun Zhou, Yuanhui Ji, Haiying Tang, Changsong Wang
Summary: Struvite (MAP) crystallization technology is widely employed for ammonia nitrogen treatment due to its simplicity and high removal efficiency. However, the presence of heavy metal ions in waste effluents hampers crystal growth, leading to slow crystallization rates and small crystal sizes, thus limiting MAP recovery and economic value. This study investigated the effects of three heavy metal ions (Cu2+, Zn2+, and Pb2+) concentrations on crystal morphology, size, growth rate, and crystallization kinetics of MAP. A relationship was established between the kinetic rate constant Kt and heavy metal ion concentrations, providing guidance for optimizing the MAP crystallization process in the presence of heavy metal ions.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Milena Obradovic, Aleksandra Dakovic, Danijela Smiljanic, Milica Ozegovic, Marija Markovic, George E. Rottinghaus, Jugoslav Krstic
Summary: Cationic surfactant ODMBA modified minerals, including organobentonite, organokaolin, and organozeolite, were studied as adsorbents for the removal of non-steroidal anti-inflammatory drugs IBU and DS. The results showed that organobentonite had the highest adsorption capacity, while organokaolin and organozeolite had lower capacities. The adsorption mechanism involved hydrophobic interactions, electrostatic interactions, and anion exchange.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Chemical
Hongyan Ma, Wenyi Zhou, Xiaojun Xu, Xuan Zhu, Lirong Wang, Xiuding Shi, Ming Jiang, Chengxue Li, Tianguo Li
Summary: A combined process of electrocatalytic internal Fe0/C micro-electrolysis (ECIME) fluidized bed was developed to investigate the co-removal performance and reaction characteristics differences of Pb2+ and Zn2+ from acid smelting wastewater. The results showed that Pb2+ and Zn2+ can be electrodeposited on the carbon microelectrodes surface and their removal pathways differ. Response surface optimization indicated that the optimal conditions for co-removal were a polarization voltage of 11.0 V, a reaction time of 58.65 min, an initial pH of 5.0, and an electrolyte concentration of 0.08 mol/L, achieving an average removal efficiency of 98.52%.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Eliska Mikyskova, Barbora Dousova, Petr Mikysek, Miloslav Lhotka, David Kolousek
Summary: Many studies have focused on the investigation of new remediation techniques using adsorption to fix toxic ions to second-rate and low-cost materials. This study specifically focuses on waste ceramics, especially waste brick dust, and confirms their good adsorption capacity for Pb2+ ions. The properties of the waste brick dust were characterized, and the BDL was found to have more than twice the adsorption capacity as the BDH.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
Maqbool Ur Rehman, Abdul Manan, Muhammad Uzair, Amir Sada Khan, Atta Ullah, Arbab Safeer Ahmad, Arshad Hussain Wazir, Ibrahim Qazi, Murad Ali Khan
Summary: This study focused on investigating and characterizing the adsorption properties of clay collected from the Kasho River in Bannu, Pakistan. The clay was used as a low-cost adsorbent to remove a cationic dye from aqueous solution, showing good adsorption performance and potential for wastewater treatment.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Review
Environmental Sciences
Malsawmdawngkima Hnamte, Ajmal Koya Pulikkal
Summary: Wastewater treatment is crucial for protecting water sources, and clay-polymer nanocomposites (CPNs) have shown promise as efficient adsorbents for pollutants in water.
Article
Astronomy & Astrophysics
S. R. Gainey, E. M. Hausrath, J. A. Hurowitz
Summary: Although evidence of past liquid water on Mars exists, the composition and amount of liquid water remains uncertain. A specific weathering profile in the Mawrth Vallis region, characterized by an Al-rich unit overlying an Fe/Mg-rich unit, may provide insight into past aqueous conditions on Mars and similar transitions in clay mineralogy. Reactive transport modeling of alteration processes involving different clay mineral compositions suggests that different weathering profiles can be formed through the alteration of parent materials, with implications for habitability and biosignature preservation on Mars.
Article
Chemistry, Physical
Sen Yang, Xiantang Liu, Gang Yang
Summary: This study uses molecular dynamics simulations to investigate cation exchange mechanisms at clay interfaces, revealing different selectivities for various binary ion systems and highlighting the strong coupling between thermodynamics, kinetics, and confinement effects. The results provide new insights into cation exchange processes at clay interfaces and offer explanations for experimental observations at the molecular level.
APPLIED CLAY SCIENCE
(2021)
Article
Chemistry, Physical
Iman Kouda, Nordin Ben Seddik, Asmae Laaziz, Mohamed Hadri, Khalid Draoui, Azzeddine Elmidaoui
Summary: This study aimed to evaluate the potential of a natural clay modified with cellulose acetate polymer (CA) for removing crystal violet (CV) dye from aqueous solutions. The cellulose acetate-clay composite (CA-Clay) was characterized and investigated for CV adsorption. The results showed that CA-Clay had a higher maximum adsorption capacity compared to raw clay. Kinetic and isotherm models were used to fit the adsorption behavior, and thermodynamic parameters indicated a spontaneous process with increasing temperature. Molecular Dynamic simulations provided insights into the adsorption mechanisms and interactions between CV molecules and the clay surfaces. Overall, CA-Clay showed promise as an efficient and sustainable adsorbent for cationic dyes.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Mohammad Kazem Rofouei, Jahan B. Ghasemi, Leila Arjomandi-Behzad, Hassan Behnejad
Summary: The complexation reactions of Hg2+, Pb2+, Zn2+, and Cd2+ cations with newly synthesized triazene ligands were studied in nonaqueous solvents. The results showed that the properties of the solvents and the shape of solvent molecules played important roles in the complex stability. Furthermore, a linear relationship between the formation constants and temperature was observed, and entropy-enthalpy compensation was found in the complexation reactions.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Chemical
Long Ye, Zhuxian Zhou, Youqing Shen, Liming Jiang
Summary: This study investigates the deposition kinetics and thermodynamic aspects of silica nanoparticles on silk fibers, revealing that the interaction between nanoparticles and fibers is size-dependent and can be quantitatively described using a modified collision model. The small-sized nanoparticles have enthalpy-driven interactions, while the large-sized nanoparticles have entropy-driven interactions during nanofunctionalization, with hydrogen bonding contributing to a small percentage of the total binding enthalpy according to the proposed adsorption model.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Muekremin Yilmaz, Emre Alp
Summary: A relatively low-cost blue-emitting Zn2(OH)BO3:Pb2+ phosphor was successfully synthesized through hydrothermal method at low temperature. The effects of dopant concentration on its structural and optical properties were studied, and its temperature sensing capability was evaluated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Environmental Sciences
Gill Gillenay Haciosmanoglu, Carmen Mejias, Julia Martin, Juan Luis Santos, Irene Aparicio, Esteban Alonso
Summary: Increased antibiotic use worldwide has caused concerns due to their health and environmental impacts. This paper reviews the recent progress in using natural and modified clay minerals as efficient and cost-effective adsorbents for the removal of antibiotics from water. The characteristics of clay minerals as adsorbents and the factors affecting the adsorption are explored, along with future trends and strategies to increase their adsorption capacity. The paper also discusses the application of these adsorbents at pilot scale and other related issues such as reuse, economic analysis, and life cycle assessment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
