Adsorption and enrichment of platinum(iv), palladium(ii), and rhodium(iii) from aqueous solutions using a modified jute powder followed by the separation and purification of the metals
- 1State Key Laboratory of Precious Metal Functional Materials, Yunnan Precious Metals Laboratory Co., Ltd Kunming 650106 Yunnan China [email protected].
- 2Sino-Platinum Metals Resources (Yimen) Co. Ltd Yuxi 653100 China.
Abstract
Most studies on the recovery of platinum group metals from aqueous solutions focus on adsorption and enrichment, with little emphasis on subsequent separation and purification of the metals from the eluent. Here, a modified jute powder adsorbent (MJP) was prepared via polyethyleneimine functionalization and glutaraldehyde crosslinking to efficiently recover Pt, Pd, and Rh from complex low-concentration platinum-group-metal waste solutions. The adsorption performances and mechanisms and the subsequent separation and purification of the metals from the eluent were systematically investigated. The adsorption behaviors of Pt(iv), Pd(ii), and Rh(iii) were more satisfactorily described using pseudo-second-order kinetic and Langmuir isotherm models. The respective maximum Pt(iv), Pd(ii), and Rh(iii) adsorption capacities of MJP reached 582, 615, and 412 mg g⁻¹, which were 5.82-, 5.50-, and 6.60-fold higher than those of the unmodified jute powder, respectively. Adsorption involved electrostatic attraction, coordination interactions, and partial reduction. Industrial wastewater studies indicated that MJP could effectively enrich the Pt, Pd, and Rh within the eluent, whereas impurity elements, such as Fe, were scarcely enriched. Sequential separation and purification of the enriched eluent by NH4Cl precipitation, NH3 hydrolysis, and NH3 complexation-acid precipitation yielded Pt, Rh, and Pd with direct recovery efficiencies of 98.7%, 96.7%, and 98.0%, respectively. Therefore, MJP can couple front-end adsorption and enrichment with downstream hydrometallurgical purification, providing an effective approach for recovering precious metals from complex low-concentration waste solutions and extending the potential of biomass-based adsorbents in hydrometallurgy.
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BibTeX
@article{guozhen2026adsorption,
title = {{Adsorption and enrichment of platinum(iv), palladium(ii), and rhodium(iii) from aqueous solutions using a modified jute powder followed by the separation and purification of the metals}},
author = {Wang Guozhen and Zhang Jingfan and Liu Kuo and Wang Chao and Yang Han and Liu Lang and Kang Xinke and Han Jibiao and Zhao Jiachun and Dong Haigang},
journal = {RSC advances},
year = {2026},
month = nov,
doi = {10.1039/d6ra07566e},
url = {https://europepmc.org/article/PMC/PMC13725859},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Adsorption and enrichment of platinum(iv), palladium(ii), and rhodium(iii) from aqueous solutions using a modified jute powder followed by the separation and purification of the metals
AU - Wang Guozhen
AU - Zhang Jingfan
AU - Liu Kuo
AU - Wang Chao
AU - Yang Han
AU - Liu Lang
AU - Kang Xinke
AU - Han Jibiao
AU - Zhao Jiachun
AU - Dong Haigang
PY - 2026
DA - 2026/11/02
JO - RSC advances
DO - 10.1039/d6ra07566e
UR - https://europepmc.org/article/PMC/PMC13725859
AB - Most studies on the recovery of platinum group metals from aqueous solutions focus on adsorption and enrichment, with little emphasis on subsequent separation and purification of the metals from the eluent. Here, a modified jute powder adsorbent (MJP) was prepared via polyethyleneimine functionalization and glutaraldehyde crosslinking to efficiently recover Pt, Pd, and Rh from complex low-concentration platinum-group-metal waste solutions. The adsorption performances and mechanisms and the subsequent separation and purification of the metals from the eluent were systematically investigated. The adsorption behaviors of Pt(iv), Pd(ii), and Rh(iii) were more satisfactorily described using pseudo-second-order kinetic and Langmuir isotherm models. The respective maximum Pt(iv), Pd(ii), and Rh(iii) adsorption capacities of MJP reached 582, 615, and 412 mg g⁻¹, which were 5.82-, 5.50-, and 6.60-fold higher than those of the unmodified jute powder, respectively. Adsorption involved electrostatic attraction, coordination interactions, and partial reduction. Industrial wastewater studies indicated that MJP could effectively enrich the Pt, Pd, and Rh within the eluent, whereas impurity elements, such as Fe, were scarcely enriched. Sequential separation and purification of the enriched eluent by NH4Cl precipitation, NH3 hydrolysis, and NH3 complexation-acid precipitation yielded Pt, Rh, and Pd with direct recovery efficiencies of 98.7%, 96.7%, and 98.0%, respectively. Therefore, MJP can couple front-end adsorption and enrichment with downstream hydrometallurgical purification, providing an effective approach for recovering precious metals from complex low-concentration waste solutions and extending the potential of biomass-based adsorbents in hydrometallurgy.
SN - 2046-2069
ER -