Article
Engineering, Environmental
Hassanien Gomaa, Mohammed Y. Emran, Mohamed M. Elsenety, Rabeea D. Abdel-Rahim, Qibo Deng, Mohamed I. Gadallah, Mohamed Saad, Hussain ALMohiy, Hassan Refat H. Ali, Faraghally A. Faraghally, Tarek A. Seaf El-Nasr, Mohamed S. A. El-Gaby, Abdelaziz M. Aboraia
Summary: In this study, a new fluorescent probe, PFBS, was developed for the detection of thorium (Th(IV)) ions in aqueous solution. A hybrid ZrPFBS was prepared for the selective removal of ultra-trace Th(IV) ions from water samples. Systematic investigations were conducted to optimize the Th(IV)-detection/adsorption process. The results showed that ZrPFBS had a high Th(IV) removal efficiency of 97.5% at pH 4, and Langmuir and pseudo-second order models successfully described Th(IV) ion adsorption. DFT simulations confirmed the adsorption mechanism and the capability of ZrPFBS to adsorb Th(IV) ions even after multiple reuse cycles.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Yaoyao Huang, Huaili Zheng, Hong Li, Zhanmei Zhang, Chun Zhao, Qian Gou, Yuanyuan Liu
Summary: The study demonstrates that mpg-C3N4 is an effective adsorbent with high selectivity and efficiency for Th(IV), making it an attractive adsorbent for selective adsorption of thorium from multi-ion solutions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Clara Isabel Orozco, M. Sonia Freire, Diego Gomez-Diaz, Julia Gonzalez-Alvarez, Klaus Kuemmerer
Summary: Untreated Pinus radiata sawdust was found to be a promising and efficient adsorbent for the removal of Cu+2 ions from aqueous solutions. The best conditions for adsorption efficacy (93.4% removal percentage and 0.82 mg/g adsorption capacity) were achieved by increasing the adsorbent dose to 5 g/L, adjusting the solution pH to 7, and decreasing the initial metal ion concentration to 5 mg/L. The adsorption process involved different stages and fitted well with the Langmuir isotherm and second-order kinetic model. Additionally, high desorption efficiencies up to 94.5% were achieved, and the possibility of sawdust regeneration was studied.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Engineering, Chemical
Faten M. Abu Orabi, Fawwaz Khalili, Latifa S. Ismail
Summary: This study investigated the biosorption of uranium and thorium ions using Hedera helix leaves. The biosorption process followed pseudo-second-order kinetics and Langmuir isotherm best described the biosorption isotherm. Desorption studies showed efficient recovery of uranium and thorium using nitric acid solutions after multiple cycles.
DESALINATION AND WATER TREATMENT
(2021)
Review
Green & Sustainable Science & Technology
Ana Beatriz Vitorino de Farias, Talles Barcelos da Costa, Meuris Gurgel Carlos da Silva, Melissa Gurgel Adeodato Vieira
Summary: This review highlights the potential of bio/adsorption as a sustainable method for cerium recovery, emphasizing its simplicity, cost-effectiveness, and efficiency. Studies have shown that cerium bio/adsorption is spontaneous, endothermic, and mainly follows pseudo-second order kinetics and Langmuir equilibrium models. Additionally, the use of acidic media for cerium desorption and the evaluation of dynamic systems for scaling up bio/adsorptive processes were discussed to address challenges and future prospects in this research area.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Leandro Goulart de Araujo, Ludmila Cabreira Vieira, Rafael Luan Sehn Canevesi, Edson Antonio da Silva, Tamires Watanabe, Rafael Vicente de Padua Ferreira, Julio Takehiro Marumo
Summary: This study aimed to assess alternatives to current challenges on environmental quality and circular economy. The biosorption of hexavalent uranium (U(VI)) using Limnobium laevigatum and Azolla sp. was examined by three parameters: biomass dose, metal ion concentration, and contact time. The results showed that Azolla sp. had a higher uranium uptake and can be used for the treatment of uranium-contaminated solutions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Yun Wang, Xinchen Chen, Xuewen Hu, Peng Wu, Tu Lan, Yang Li, Hong Tu, Yan Liu, Dingzhong Yuan, Zhenyu Wu, Zhirong Liu, J. W. Chew
Summary: The ultralight three-dimensional porous network phosphonic acid functionalized polymer/graphene oxide nanoribbons aerogel (PAFP/GONRs-A) showed excellent adsorption capacity for thorium, with a maximum capacity of 457.9 mg g(-1) at a pH of 3.0 and a maximum thorium selectivity of 87.1% at a pH of 2.0 under optimal experimental conditions. Additionally, the adsorption process of Th(IV) on PAFP/GONRs-A was found to be pH-dependent, spontaneous, and endothermic.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Qingzhou Zhao, Zhihong Xu, Zhisheng Yu
Summary: Biochar is considered a promising sorbent for removing radioactive uranyl and thorium ions in freshwater due to its efficiency and ease of operation. Experimental results showed good adsorption performance and applicability to various models for U(VI) and Th(IV). The study also identified key properties of the adsorption reaction that positively impact its feasibility.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Green & Sustainable Science & Technology
Mahbubeh Tangestani, Behrouz Naeimi, Sina Dobaradaran, Mozhgan Keshtkar, Parisa Salehpour, Zahra Fouladi, Samaneh Zareipour, Farzaneh Sadeghzadeh
Summary: The study demonstrated that Rhizopus oryzae fungal biomass was effective in removing fluoride from aqueous solutions, with the optimum conditions achieving a 90.5% biosorption rate. The Langmuir model best fitted the data, indicating a monolayer biosorption of fluoride by the biosorbent.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2022)
Article
Environmental Sciences
Pei-Ling Yen, Ching-Hsuan Hsu, Mei-Lun Huang, Vivian Hsiu-Chuan Liao
Summary: This study demonstrates that coffee grounds can effectively remove polystyrene nanoplastic particles from aqueous solutions, with a maximum adsorption efficiency of 74% at a coffee ground concentration of 25 g/L. The Dubinin-Radushkevich model and pseudo-second-order model describe the adsorption isotherm and kinetics well, indicating favorable adsorption at high concentrations.
Article
Materials Science, Paper & Wood
Catarina H. Pimentel, M. Sonia Freire, Diego Gomez-Diaz, Julia Gonzalez-Alvarez
Summary: The possibility of using un-treated pine sawdust as a biosorbent for removing wood dyes from aqueous solutions was investigated. The material had a BET surface area of 1.55 +/- 0.81 m(2) g(-1) using N-2 at - 196 degrees C and 17.83 +/- 0.032 m(2) g(-1) using CO2 at 0 degrees C. The optimum conditions for adsorption were pH 2 and an adsorbent dose of 6 g L-1.
Article
Engineering, Environmental
Marlon Manuel Cuetocue Petins, Rodrigo Andres Sarria-Villa, Ricardo Benitez Benitez, Jose Antonio Gallo Corredor
Summary: The modified adsorbent AT extracted from Pinus patula bark shows high selectivity and adsorption capacity for gold (III), making it suitable for recovery of gold in low concentrations of hydrochloric acid. The maximum adsorption capacity of the adsorbent is 666.67 mg L-1, with higher efficiency in adsorbing gold compared to other metals.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Yufen Xu, Tianqiong Peng, Zengcheng Liu, Yanfei Wang
Summary: Bis (diphenyl phosphate) imine (Htpop) was synthesized using a one-step solvent method for thorium (IV) removal from aqueous solutions. Characterization techniques such as NMR, FTIR, SEM, EDS, and XPS were used to analyze the structure, functional group displacement, morphological differences, and elemental composition. The adsorption equilibrium was reached within 40 minutes at pH=4.0 and temperature of 298 K, with an adsorption capacity of 189.32 mg center dot g(-1). The adsorption process followed the quasi-second-order kinetic model (R-2=0.9959) and Langmuir model (R-2=0.9971). The thermodynamic data ((sic)H-0<0, (sic)G(0)<0) indicated that the adsorption of thorium (IV) in Htpop was spontaneous and exothermic.
Article
Biotechnology & Applied Microbiology
Jessyca E. S. Pereira, Ruan L. S. Ferreira, Paula F. P. Nascimento, Alfredo J. F. Silva, Carlos E. A. Padilha, Eduardo L. Barros Neto
Summary: This study utilized cashew leaf and carnauba straw as natural bioadsorbents to remove copper (II) ions from aqueous solution. Through various experiments, it was found that the maximum adsorption capacity of copper (II) ions differed between the two bioadsorbents.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Biochemistry & Molecular Biology
Hailan Yu, Yiming Dai, Limin Zhou, Jinbo Ouyang, Xiaohuan Tang, Zhirong Liu, Adesoji A. Adesina
Summary: This study successfully fabricated ion-imprinted honeycomb-like chitosan/kaolin clay composite foams and demonstrated their potential for selective biosorption of U(VI). The ion-imprinted sorbent showed higher sorption capacity and selectivity compared to the non-imprinted sorbent, thanks to its ability to smartly recognize the target ions. This research provides a potential solution for the separation of U(VI) from radioactive wastewater.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)