首页|Vine pruning waste-based activated carbon for cerium and lanthanum adsorption from water and real leachate

Vine pruning waste-based activated carbon for cerium and lanthanum adsorption from water and real leachate

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
In this study,vine pruning wastes(VPW)were used as raw material to develop an alternative activated carbon(VPW-AC)for adsorbing and concentrating rare earth elements cerium(Ce(Ⅲ))and lanthanum(La(Ⅲ))from synthetic and real leachate solutions.The Ce and La adsorption studies evaluated the effects of VPW-AC dosage,pH,contact time,rare earth initial concentration,and temperature.The VPW-AC adsorbent was subjected to many physicochemical characterization methods to correlate and under-stand its adsorptive performance.The characterization data indicate a carbonaceous adsorbent with a specific surface area of 467 m2/g.Zeta potential indicates a material with a negatively charged surface at a pH higher than 3.1,which is extremely beneficial to cations removal.For both rare earths elements(REEs),the adsorption capacity increases with the increase of the pH,reaching its maximum at pH 4-6.The kinetic data are well fitted by Avrami-fractional order,while the Liu model agreeably fits equilibrium data.The maximum adsorption capacities for Ce(Ⅲ)and La(Ⅲ)are 48.45 and 53.65 mg/g at 298 K,respectively.The thermodynamic studies suggest that the adsorption process is favorable,spontaneous,and exothermic for both REEs.Pore filling,surface complexation,and ion exchange are the dominant mechanisms.Finally,the VPW-AC was subjected to the recovery of REEs from real phosphogypsum leachate,and it is proved that it can be successfully used to recover REEs in a real process.

Vine pruning wastesSustainable carbon adsorbentRare earth elementsPhosphogypsum leachateIon-exchange mechanism

Raphael Forgearini Pinheiro、Alejandro Grimm、Kátia da Boit Martinello、Mohammad Rizwan Khan、Naushad Ahmad、Luis Felipe Oliveira Silva、Irineu Antônio Schadach De Brum、Guilherme Luiz Dotto、Glaydson Simões dos Reis

展开 >

Research Group on Adsorptive and Catalytic Process Engineering(ENGEPAC),Federal University of Santa Maria,Av.Roraima,1000-7,97105-900,Santa Maria,RS,Brazil

Department of Forest Biomaterials and Technology,Biomass Technology Centre,Swedish University of Agricultural Sciences,Umeå SE-901 83,Sweden

Universidad De La Costa,Calle 58 # 55-66,080002,Barranquilla,Atlántico,Colombia

Department of Chemistry,College of Science,King Saud University,Riyadh,11451,Kingdom of Saudi Arabia

Institute of Chemistry,Federal University of Rio Grande do Sul,90040-060,Porto Alegre,Brazil

展开 >

2024

10.1016/j.jre.2023.10.020

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(10)