Mild hydrothermally treated brewer's spent grain for efficient removal of uranyl and rare earth metal ions

Su, Yi; Böhm, Wendelin; Wenzel, Marco; Paasch, Silvia; Acker, Margret; Doert, Thomas; Brunner, Eike; Henle, Thomas; Weigand, Jan J.

doi:10.1039/d0ra08164g

Cited by 17 publications

(14 citation statements)

References 71 publications

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“…The highest adsorption capacity of OBSG toward U(VI) obtained from the current isotherm experiments is 297.3 mg/g ( c 0 (U) = 900 mg/L), which is 210% higher than the unmodified BSG (96 mg/g) . In addition, the adsorption capacity of OBSG is higher than those of reported biosorbents and synthetic adsorbents (see Table ), such as cellulose nanofibers (167 mg/g), hydrochar (67 mg/g), and ion-imprinted resin based on carboxymethyl cellulose (U-CMC-SAL, 180 mg/g) .…”

Section: Resultsmentioning

confidence: 65%

“…64 The highest adsorption capacity of OBSG toward U(VI) obtained from the current isotherm experiments is 297.3 mg/g (c 0 (U) = 900 mg/L), which is 210% higher than the unmodified BSG (96 mg/g). 30 In addition, the adsorption capacity of OBSG is higher than those of reported biosorbents and synthetic adsorbents (see Table 3), such as cellulose nanofibers (167 mg/g), 22 hydrochar (67 mg/g), 8 and ionimprinted resin based on carboxymethyl cellulose (U-CMC-SAL, 180 mg/g). 65 Some adsorbents like the chitosan-derived adsorbent (CTPP) 9 and graphene oxide-derived adsorbent (CoFe 2 O 4 -rGO) 7 present a close adsorption capacity (>220 mg/g) to OBSG but need a longer time to reach adsorption equilibrium (72 h for CTPP and 3 h for CoFe 2 O 4 -rGO), while OBSG shows fast adsorption kinetics of only 1 h. In practical application, the decontamination of uranium from wastewater and the natural water environment commonly involves trace U(VI) concentration at the μg/L level instead of the mg/L level.…”

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confidence: 91%

“…The production of active carbon and activated hydrochar are the most common heat conversion methods, however, with high energy consumption. In our previous study, hydrothermal treatment of BSG at low temperature (150 °C) without activation yields a biosorbent with an adsorption capacity of U(VI) of 220.6 mg/g. In addition, complicated chemical modifications such as esterification and thiol functionalization of BSG have also been reported.…”

Section: Introductionmentioning

confidence: 98%

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Recycling of Brewer’s Spent Grain as a Biosorbent by Nitro-Oxidation for Uranyl Ion Removal from Wastewater

Wenzel

Paasch

et al. 2021

ACS Omega

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Developing biosorbents derived from agro-industrial biomass is considered as an economic and sustainable method for dealing with uraniumcontaminated wastewater. The present study explores the feasibility of oxidizing a representative protein-rich biomass, brewer's spent grain (BSG), to an effective and reusable uranyl ion adsorbent to reduce the cost and waste generation during water treatment. The unique composition of BSG favors the oxidation process and yields in a high carboxyl group content (1.3 mmol/g) of the biosorbent. This makes BSG a cheap, sustainable, and suitable raw material independent from pretreatment. The oxidized brewer's spent grain (OBSG) presents a high adsorption capacity of U(VI) of 297.3 mg/g (c 0 (U) = 900 mg/L, pH = 4.7) and fast adsorption kinetics (1 h) compared with other biosorbents reported in the literature. Infrared spectra (Fourier transform infrared), 13 C solid-state nuclear magnetic resonance spectra, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and thermogravimetric analysis were employed to characterize the biosorbents and reveal the adsorption mechanisms. The desorption and reusability of OBSG were tested for five cycles, resulting in a remaining adsorption of U(VI) of 100.3 mg/g and a desorption ratio of 89%. This study offers a viable and sustainable approach to convert agro-industrial waste into effective and reusable biosorbents for uranium removal from wastewater.

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Section: Resultsmentioning

confidence: 65%

mentioning

confidence: 91%

Section: Introductionmentioning

confidence: 98%

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Recycling of Brewer’s Spent Grain as a Biosorbent by Nitro-Oxidation for Uranyl Ion Removal from Wastewater

Wenzel

Paasch

et al. 2021

ACS Omega

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“…82 The rare-earth adsorption mechanism of beer waste materials with mild hydrothermal treatment is ion exchange of carboxyl or nitrogenous functional groups. 83 The rare-earth adsorption principle of the Mg(OH) 2 TP207 resin is chemical coordination. 84 The UV-induced rare-earth adsorption mechanism of pine bark materials is surface coordination of carboxyl groups.…”

Section: Mechanism Analysismentioning

confidence: 99%

Efficient adsorption of low concentration rare-earth ions by carbides derived from excess sludge: preparation, performance and mechanism

et al. 2022

Environ. Sci.: Water Res. Technol.

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“…O pHPCZ é definido como o valor de pH no qual a carga de superfície líquida (interna e externa) é nula (MUSTAFA et al, 2002). O resultado está de acordo com demais trabalhos na literatura para hidrochars que, devido à maior presença de grupos ácidos em sua superfície, apresentam valores de pHPCZ baixos (SALAZAR-RABAGO et al, 2017;SU et al, 2020;TRAN;CHAO, 2017). Inicialmente, é possível verificar a presença de uma banda entre 3500 e 3200 cm -1 , atribuída ao estiramento das ligações de grupamentos hidroxila da celulose e da lignina componentes da biomassa, bem como à presença de água superficial.…”

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Otimização multivariada da síntese one-pot de hidrochar ativado a partir de resíduo de bagaço de malte

Fontoura

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A indústria cervejeira é um setor em crescimento no país, o qual desponta como o terceiro maior produtor da bebida no mercado internacional. Um dos principais resíduos do processo é o bagaço de malte, tendo como destino principal a alimentação animal. Entretanto, fazem-se necessários novos processos a fim de valorizar essa biomassa, gerando materiais de maior valor agregado. Nesse contexto, o presente trabalho teve como objetivo obter materiais a partir do bagaço de malte utilizando a carbonização hidrotérmica com ativação ácida one-pot. A Matriz de Doehlert foi implementada avaliando a influência dos parâmetros temperatura (100, 125, 150, 175 e 200 °C) e tempo de residência (4, 14 e 24 h) no rendimento mássico e na capacidade de remoção do corante azul de metileno em solução aquosa. Os materiais obtidos foram caracterizados, a fim de contribuir com a discussão de suas propriedades físico-químicas. O hidrochar otimizado (150 °C, 14 h) apresentou uma área superficial baixa (aproximadamente 9 m2 g -1 ), porém a presença de grupos funcionais oxigenados na superfície do material auxilia em sua capacidade adsortiva. O modelo cinético de pseudo-segunda ordem e o modelo de isoterma de Freundlich ajustaram-se melhor dados experimentais. O equilíbrio de adsorção ocorreu em 8 h e a capacidade máxima de adsorção atingiu 134,78 mg g -1 de azul de metileno a 30 °C. Posteriormente, ainda por via HTC, foi avaliada a produção de um compósito de ferro suportado em hidrochar para aplicação em reação de foto-Fenton para degradação do corante alaranjado de metila. Estudos iniciais demonstraram a viabilidade do material para fotodegradação de poluentes. Ensaios com inibidores verificaram que as principais espécies envolvidas no processo são os radicais ·OH e ·O 2- . O pH inicial e a dose de H 2 O 2 otimizados para a reação foram determinados (pH 3 e C H2O2 = 20 mmol L -1 ). A carbonização hidrotérmica com ativação e funcionalização em uma única etapa se mostrou uma forma adequada para o tratamento do bagaço de malte, com vistas à aplicação do material como adsorvente e suporte de catalisador para degradação de poluentes orgânicos em água. Palavras-chave: Carbonização hidrotérmica. Síntese verde. Adsorção. Foto-Fenton. Corantes.

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Mild hydrothermally treated brewer's spent grain for efficient removal of uranyl and rare earth metal ions

Abstract: Effective biosorbent ABSG is obtained via hydrothermal treatment of BSG at low temperature without activation, minimizing energy consumption and environmental impact.

Cited by 17 publications

References 71 publications

Recycling of Brewer’s Spent Grain as a Biosorbent by Nitro-Oxidation for Uranyl Ion Removal from Wastewater

Recycling of Brewer’s Spent Grain as a Biosorbent by Nitro-Oxidation for Uranyl Ion Removal from Wastewater

Efficient adsorption of low concentration rare-earth ions by carbides derived from excess sludge: preparation, performance and mechanism

Otimização multivariada da síntese one-pot de hidrochar ativado a partir de resíduo de bagaço de malte

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