Desorption of Cadmium from Cocoa Waste Using Organic Acids DOI Creative Commons
Sebastián Piedrahíta-Pérez,

Juliana Rodríguez-Estrada,

Margarita Ramírez-Carmona

et al.

Foods, Journal Year: 2024, Volume and Issue: 13(24), P. 4048 - 4048

Published: Dec. 15, 2024

This study evaluated the desorption of cadmium (Cd) from cocoa waste-derived flour using organic acids. Cocoa pods were collected Antioquia and Casanare, Colombia, to analyze geographical Cd content its distribution within pod tissues. Acid selection was performed a multi-criteria decision-making (MCDM) matrix, assessed through full factorial 23 experimental design, considering acid concentration, pulp density, agitation speed. Additionally, oxidation–reduction potential (ORP) monitored as an indicator electrochemical dynamics process. The results indicated that Casanare exhibited higher concentrations (1.63 ± 0.20 ppm) compared with those (0.87 0.22 ppm), 49.31% metal being accumulated in pod. Parameters citric at 0.5 M, 5 g/L 120 rpm found be optimal for process, achieving over 95% efficiency. Based on ORP monitoring, heuristic proposed determine contact time during leaching. work outlines scalable process desorption, adding value industry waste applications.

Language: Английский

Distribution and leaching characteristics of metal elements in coal gasification fine Slag: Insights into inorganic and organic acid systems DOI
Zhiqiang Xu, Yujia Wang, Yu Qian

et al.

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131517 - 131517

Published: Jan. 1, 2025

Language: Английский

Citations

1
Synthesis of tobermorite using coal fly ash and its utilization in highly efficient CO2 adsorption DOI

Chunbin Guo,

Yonghong Song,

M. Ye

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 358, P. 130382 - 130382

Published: Nov. 7, 2024

Language: Английский

Citations

5
Electron microbeam investigations of the spent ash from the pilot-scale acid extraction of rare earth elements from a beneficiated Kentucky fly ash DOI
Debora Berti, John Groppo, P. C. Joshi

et al.

International Journal of Coal Geology, Journal Year: 2025, Volume and Issue: unknown, P. 104738 - 104738

Published: March 1, 2025

Language: Английский

Citations

0
Application of Taguchi Method for Optimization of Precious Metal Recovery from Coal Fly Ash DOI Open Access

Iga Trisnawati,

Fasya Mazaya Asrikania,

Fauziah Ulfah Ajri

et al.

IOP Conference Series Earth and Environmental Science, Journal Year: 2025, Volume and Issue: 1486(1), P. 012029 - 012029

Published: April 1, 2025

Abstract Coal fly ash (CFA) is considered to be a promising secondary source for precious metal recovery. One application in the recovery of metals from CFA through an acid-leaching process that begins with roasting or alkali fusion. This research studies mineral content coal Tarahan Steam Power Plant, Lampung, 3-stage hydrometallurgy (alkali fusion, water leaching, and acid leaching). consists more than 20 different elements, main elements this being dominated by Fe, Si, Ca, Al percentages 34.915%, 26.04%, 15.83%, 12.396%, respectively. It also has summary concentration SiO2, Al2O3, Fe2O3 78.16% CaO 12.6%. Roasting NaOH at 400 °C can break down aluminum silicate structure into water-soluble phase. More 70% (Si, Al, Mg) are soluble leaching. The leaching was optimized Taguchi orthogonal array L16 experimental design. optimum conditions each element were obtained combinations. Among four types acids used study, citric suitable Light Rare Earth Elements (Ce, Nd, Pm) recovery, acetic Gd Sm, sulfuric Heavy (Yb Er). average condition 3 M concentration, 120 °C, Solid Liquid (S/L) ratio 1:40, temperature S/L most influential factors on ash.

Language: Английский

Citations

0
Fate of Ca2+ and metal impurities of a typical coal fly ash in amino acid mediated CO2 mineralization and simultaneous CaCO3 recovery DOI
Yikun Wang, Xuan Zheng, Yan Wang

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 353, P. 128610 - 128610

Published: June 28, 2024

Language: Английский

Citations

3
Efficient Separation of Adjacent Rare Earths in One Step by Using Ion‐microporous Metal–Organic Frameworks DOI Open Access

An‐Min Song,

Meng‐Jie Yang,

Zhi Wu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 20, 2024

Abstract High‐purity rare earth (REEs) materials are key raw for the development of cutting‐edge technologies. However, due to similar physical and chemical properties, separating adjacent REEs from actual samples faces a formidable challenge. To overcome this challenge, an ion‐microporous metal–organic framework (ATZ‐BTC‐Zn; MOFs) is designed synthesized, featuring densely packed nano‐trap pockets constructed non‐coordinating carboxyl amino groups. The synergistic effect open suitable ions channel in ATZ‐BTC‐Zn highly responsive size variation lighter REEs. Notably, configuration Zn(H 2 O) 6 2+ counterion lanthanide hydrated (Ln(H 3+ ), facilitating efficient ion exchange between them high‐speed transport channel. This accelerates diffusion within MOF pores, enhancing utilization active adsorption sites promoting capture by nano‐traps. binary model experiments show high separation factors ( SF La/Nd = 908, Ce/La 543), demonstrating one step. capability achieves selective tailings wastewater, providing strategy infer compatibility MOFs

Language: Английский

Citations

2
Synchrotron-aided exploration of REE recovery from coal fly ashes within a Canadian context DOI
Yuwei Wu, Guohe Huang, Peng Zhang

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: unknown, P. 143562 - 143562

Published: Oct. 1, 2024

Language: Английский

Citations

0
Desorption of Cadmium from Cocoa Waste Using Organic Acids DOI Creative Commons
Sebastián Piedrahíta-Pérez,

Juliana Rodríguez-Estrada,

Margarita Ramírez-Carmona

et al.

Foods, Journal Year: 2024, Volume and Issue: 13(24), P. 4048 - 4048

Published: Dec. 15, 2024

This study evaluated the desorption of cadmium (Cd) from cocoa waste-derived flour using organic acids. Cocoa pods were collected Antioquia and Casanare, Colombia, to analyze geographical Cd content its distribution within pod tissues. Acid selection was performed a multi-criteria decision-making (MCDM) matrix, assessed through full factorial 23 experimental design, considering acid concentration, pulp density, agitation speed. Additionally, oxidation–reduction potential (ORP) monitored as an indicator electrochemical dynamics process. The results indicated that Casanare exhibited higher concentrations (1.63 ± 0.20 ppm) compared with those (0.87 0.22 ppm), 49.31% metal being accumulated in pod. Parameters citric at 0.5 M, 5 g/L 120 rpm found be optimal for process, achieving over 95% efficiency. Based on ORP monitoring, heuristic proposed determine contact time during leaching. work outlines scalable process desorption, adding value industry waste applications.

Language: Английский

Citations

0