Article
Engineering, Environmental
Zhijing Wu, Xiangping Li, Huosheng Li, Gaosheng Zhang
Summary: Phosphorus is essential for biological growth, but its excessive presence can lead to eutrophication. The novel zero-valent manganese sorbent Mn-0@Mn2O3 shows exceptional phosphate removal performance, making it promising for phosphate removal from real municipal wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Saedah R. Al-Mhyawi, D. M. D. Bader, Majed A. Bajaber, Samia M. Abd El Dayem, Ahmed H. Ragab, Khaled A. Abd El-Rahem, Mohamed A. Gado, Bahig M. Atia, Mohamed F. Cheira
Summary: Heavy metal contamination is a global environmental issue with significant public health risks. This study introduces an eco-friendly approach of using a composite material called ZrO2/GO, obtained from synthesized nano zirconium oxide (ZrO2) and graphene oxide (GO) prepared from spent carbon rods, to address water contamination caused by heavy metals.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Environmental
Wanpeng Chen, Jiaming Xiong, Juchao Liu, Hainan Wang, Jinni Yao, Hongxia Liu, Xiaoliu Huangfu, Qiang He, Jun Ma, Caihong Liu, Yao Chen
Summary: The transformations of monovalent thallium (Tl) in an aqueous environment are significantly affected by Tl(I) partitioning at the solid-water interface during sorption. Two unified adsorption models, diffuse layer modeling and kinetics modeling, accurately predict the environmental fate of thallium by quantifying the kinetics of Tl (I) adsorption on heterogeneous adsorbents and the formation of multiple complexes under a wide range of water chemistry conditions. The characteristics of different Tl(I) complexes have influence on the adsorption and desorption processes.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
I. V. Jurado, G. Paese, I. H. Schneider, L. A. Feris
Summary: The study evaluates the effectiveness of natural and calcined dolomites for phosphate removal in aqueous solution. Calcined dolomite exhibited enhanced surface properties and improved sorption capabilities compared to natural dolomite. The adsorption process showed high phosphate removal rates using both types of dolomites, indicating their potential for efficient removal of phosphate pollutants.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Adewumi O. Dada, Folahan A. Adekola, Ezekiel O. Odebunmi, Adeniyi S. Ogunlaja, Olugbenga S. Bello
Summary: This study investigated the adsorption of problematic copper ions from aqueous solution onto nanoscale zerovalent iron (nZVI). Results showed that nZVI exhibited high efficiency in removing heavy metals from synthetic wastewater. The study also revealed the kinetics and thermodynamic characteristics of the adsorption process.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Saeed Ahmed, Habib Ur Rehman, Zahid Ali, Abdul Qadeer, Abdul Haseeb, Zeeshan Ajmal
Summary: Porous flower-like magnesium oxide (MgO) was successfully prepared through a facile and low-cost method, exhibiting hierarchical structure and high adsorption capacity towards phosphate and methyl orange. The experimental data supported multi-layer adsorption onto MgO adsorbent with excellent performance even after multiple adsorption/desorption cycles. Overall, this work provides a promising pathway for the large-scale development of efficient adsorbent materials to address sustainable issues.
SURFACES AND INTERFACES
(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
Biochemistry & Molecular Biology
Umme Kalsoom, Zainab Ahsan, Haq Nawaz Bhatti, Faiza Amin, Raziya Nadeem, Kiran Aftab, Muhammad Bilal
Summary: Manganese peroxidase (MnP) has the ability to oxidize and detoxify a wide range of recalcitrant xenobiotics, including synthetic dyes. In this study, MnP was successfully isolated from Aspergillus flavus and immobilized on iron oxide nanoparticles, leading to improved catalytic performance. The immobilized MnP showed good degradation efficiency towards textile dye pollutants.
PROCESS BIOCHEMISTRY
(2022)
Article
Environmental Sciences
Yusuf Azmi Akbas, Sabriye Yusan, Senol Sert, Sule Aytas
Summary: In this study, magnetite and magnetic olive pomace nanocomposite were prepared by a partial reduction co-precipitation method for the removal of Ce3+ ions from aqueous solution. Various parameters affecting sorption efficiency were investigated, showing high sorption capacities for Ce(III) ions. These materials were found to be effective and sustainable adsorbents for cerium ion removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Inorganic & Nuclear
Corentin Reynaud, Cyril Thomas, Guylene Costentin
Summary: This study investigates the competitive precipitation of calcium phosphates in aqueous solution through experimental and theoretical approaches. The aim is to understand and control the structural and textural properties of synthesized hydroxyapatites. By analyzing the precipitation pH and the order of introduction of precursor ions in the synthesis reactor, the precursors of hydroxyapatites are identified and rationalized through calculations based on a homogeneous nucleation model. Depending on the synthesis conditions, the precipitation reaction pathways of hydroxyapatites are proposed, and the formation of crystallographic defects in the apatitic framework is analyzed for better control of their incorporation.
INORGANIC CHEMISTRY
(2022)
Article
Environmental Sciences
Prakash Bobde, Amit Kumar Sharma, Ranjit Kumar, Sukdeb Pal, Jitendra Kumar Pandey, Shikha Wadhwa
Summary: This study reports the adsorptive removal of oxytetracycline from water using a newly developed MnO2/PCBC adsorbent. The results show that MnO2/PCBC has high adsorption capacity and can be effectively reused for multiple cycles. This research contributes to the development of a cost-effective technique for antibiotic removal from water.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Chemistry, Physical
Kaitlin Rae M. Corpus, Justin C. Bui, Aditya M. Limaye, Lalit M. Pant, Karthish Manthiram, Adam Z. Weber, Alexis T. Bell
Summary: The rate of an electrocatalytic reaction is determined by the Tafel equation, which depends on two parameters: the Tafel slope and the exchange current density (i0). Current methods for determining these parameters suffer from uncertainties caused by the complex effects of mass transfer and competitive reactions. To address this challenge, we combined covariance matrix adaptation with a continuum model to extract kinetic parameters from literature datasets of CO2 reduction over Ag and Sn catalysts. The results showed a correlation between the Tafel slope and i0, suggesting variations in catalyst preparation methods. This work enables rigorous benchmarking of electrocatalysts in systems with mass transfer.
Article
Thermodynamics
Nabila Aprianti, Muhammad Faizal, Muhammad Said, Subriyer Nasir, Ahmad Fudholi
Summary: Understanding the kinetics and thermodynamics of fine coal gasification is crucial for improving design and optimizing clean energy production. Thermogravimetric analysis was performed to determine the activation energy and thermodynamic parameters. The gasification process followed second-order reaction kinetics and was endothermic. This analysis provides valuable guidance for optimizing the fine coal gasification process.
Article
Energy & Fuels
A. Tabal, A. Barakat, A. Aboulkas, K. El Harfi
Summary: In this study, the kinetic and thermodynamic analysis of ficus wood was conducted using thermogravimetric analysis, revealing a triple-step reaction corresponding to the pyrolysis of hemicellulose, cellulose, and lignin. The experimental data provided insight into the activation energy and thermodynamic parameters for each step, offering valuable information for the utilization of ficus wood in bioenergy applications.
Article
Thermodynamics
Vitaly Kocherbitov
Summary: The sorption calorimetry method developed by Wadso and co-workers is successful in measuring both water sorption isotherm and sorption enthalpy, though accuracy can be affected by diffusion. A new calculation method is proposed to eliminate these effects and improve the accuracy of enthalpy measurements. This new method has been successfully tested on previously published data and can be recommended for future experiments.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
