Aniline-p-Phenylenediamine Copolymer for Removal of Hexavalent Chromium from Wastewater DOI Creative Commons

Yifeng Li,

Jie Chen, Xin Tan

et al.

Separations, Journal Year: 2024, Volume and Issue: 11(11), P. 327 - 327

Published: Nov. 14, 2024

Hexavalent chromium, one of the heavy metal pollutants in water, harms ecological environment and human health. In this work, an aniline-p-phenylenediamine copolymer has been prepared by chemical oxidative polymerization to remove hexavalent chromium (Cr(VI)) from wastewater. The results show that when initial Cr(VI) concentration is 1.5 mg·L−1, removal percentage (RP%) could reach 94.84% after 180 s treatment. RP% increases with dosage copolymers decreases increase concentration. Additionally, reaches a maximum 97.70% pH value 1.0. kinetics follows pseudo-first-order reaction model. X-ray photoelectron spectroscopy (XPS) demonstrate mechanism redox reaction. positive ΔH° negative ΔG° affirm process endothermic, thermodynamically achievable, spontaneous.

Language: Английский

Preparation of Mg-doped coffee waste for efficient removal of methylene blue and lead from water DOI Creative Commons
Pengfei Li, Liang Zhao, Long Li

et al.

Heliyon, Journal Year: 2025, Volume and Issue: unknown, P. e43091 - e43091

Published: March 1, 2025

Language: Английский

Citations

0
Mechanical properties and heavy metals immobilization of lithium slag stabilized by magnesium slag as road subbase material DOI
Xuanhao Cao, Bowen Guan, Jincheng Yu

et al.

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145484 - 145484

Published: April 1, 2025

Language: Английский

Citations

0
Corn cob pyrolysis: A systematic literature review of methods and applications DOI Creative Commons
Vilmar Steffen, Maiquiel Schmidt de Oliveira,

Lais da Silva Pego Hericks

et al.

The Canadian Journal of Chemical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstractas The agricultural sector is experiencing a surge in waste generation due to population growth, creating an urgent need convert byproducts into value‐added products. Maize ( Zea mays L.), leading global crop, produces significant byproducts, such as corn cob, which are often undervalued. Biomass, including promising carbon‐neutral energy source. While combustion commonly used, pyrolysis gaining traction its ability generate solid (biochar), liquid (bio‐oil), and gaseous products, each with various applications. This study presents systematic literature review on the of utilizing three databases: Scopus, Web Science, Springer. search resulted portfolio composed 409 research papers. Normalized Index for Ranking Papers (NIRP) method was employed rank selected papers, followed by bibliometric analyses. identifies key trends, publication dynamics, influential works field. It highlights China's role output citation impact provides insights evolution topics methodologies. emphasizes significance biomass viable alternative fossil fuels, commercial adsorbents, catalyst supports, fertilizers, providing both economic environmental benefits. By examining current state research, this work seeks inform future studies promote advancement efficient eco‐friendly conversion technologies. findings aim encourage further exploration pyrolysis, highlighting potential contribute sustainable resource management reduce reliance non‐renewable resources.

Language: Английский

Citations

0
Conversion of Phosphogypsum into Porous Calcium Silicate Hydrate for the Removal and Recycling of Pb(II) and Cd(II) from Wastewater DOI Creative Commons
Gangan Wang,

Chaoyi Chen,

Junqi Li

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(11), P. 2665 - 2665

Published: June 4, 2024

The discharge of lead and cadmium wastewater, along with the pollution caused by phosphogypsum, represents a particularly urgent environmental issue. This study employed straightforward hydrothermal method to convert phosphogypsum into porous calcium silicate hydrate (P-CSH), which was then used remove recover Pb(II) Cd(II) from wastewater. adsorption capacities P-CSH for were notably high at 989.3 mg/g 290.3 mg/g, respectively. processes adhered pseudo-second-order kinetics model Langmuir isotherm model. Due identical sites on both Cd(II), competitive interaction occurred when ions present simultaneously. Additionally, efficacy minimally impacted presence common coexisting cations in dominant mechanisms removing via chemical precipitation surface complexation. Moreover, adsorbed heavy metals efficiently separated reclaimed wastewater through stepwise desorption process. primary components residue quartz amorphous SiO2. Following dissolution pressurized alkaline leaching, this could be recycled synthesizing P-CSH. research offered new strategy resourceful use metal

Language: Английский

Citations

2
A Review of Fluoride Removal from Phosphorous Gypsum: A Quantitative Analysis via a Machine Learning Approach DOI Open Access

Huagui Jin,

Yixiao Wang,

Xuebin An

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(14), P. 3606 - 3606

Published: July 22, 2024

This review comprehensively explores fluoride removal from phosphogypsum, focusing on its composition, fluorine-containing compounds, characterization methods, and defluorination techniques. It initially outlines the elemental composition of phosphogypsum prevalent in major production regions infers presence fluorine compounds based these constituents. The study highlights X-ray photoelectron spectroscopy (XPS) as a pivotal method for characterizing emphasizing capability to determine precise binding energies essential identifying various species. Additionally, first-principle density functional theory (DFT) is employed estimate different compounds. Significant correlations are observed between total atomic energy binary fluorides (e.g., alkali metals, earth boron group metals) XPS energies. However, complex like calcium fluorophosphate, with calculated average less direct. categorizes methods applied physical, chemical, thermal, thermal-combined processes, respectively. introduces neural network machine learning (ML) technology quantitatively analyze optimize reported strategies. Simulation results indicate potential optimizations quantitative analyses process conditions literature. provides systematic approach understanding speciation, analytical methodologies, effective attempts adopting DFT simulation analysis using ML optimization underscore feasibility advancing industrial process.

Language: Английский

Citations

1
Aniline-p-Phenylenediamine Copolymer for Removal of Hexavalent Chromium from Wastewater DOI Creative Commons

Yifeng Li,

Jie Chen, Xin Tan

et al.

Separations, Journal Year: 2024, Volume and Issue: 11(11), P. 327 - 327

Published: Nov. 14, 2024

Hexavalent chromium, one of the heavy metal pollutants in water, harms ecological environment and human health. In this work, an aniline-p-phenylenediamine copolymer has been prepared by chemical oxidative polymerization to remove hexavalent chromium (Cr(VI)) from wastewater. The results show that when initial Cr(VI) concentration is 1.5 mg·L−1, removal percentage (RP%) could reach 94.84% after 180 s treatment. RP% increases with dosage copolymers decreases increase concentration. Additionally, reaches a maximum 97.70% pH value 1.0. kinetics follows pseudo-first-order reaction model. X-ray photoelectron spectroscopy (XPS) demonstrate mechanism redox reaction. positive ΔH° negative ΔG° affirm process endothermic, thermodynamically achievable, spontaneous.

Language: Английский

Citations

0