In situ preparation of magnetic hydrochar by co-hydrothermal treatment of waste vinasse with red mud and its adsorption property for Pb(II) in aqueous solution

Kazak, Ömer; Tor, Ali

doi:10.1016/j.jhazmat.2020.122391

Cited by 112 publications

(22 citation statements)

References 52 publications

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“…Currently, the application of biochar mainly focusses on removing organic contaminants, pharmaceuticals, and heavy metals. For instance, Kazak et al studied the adsorption of waste vinasse biochar to Pb, where the adsorption capacity reached 141.1 mg/g [16]; Fan et al focused on tea waste biochar adsorbing Cd, whose adsorption was 16.4 mg/g to Cd [17]. Nonetheless, no attempt has been made to investigate the removal capacity of biochar made from corn stalks.…”

Section: Introductionmentioning

confidence: 99%

The Adsorption of Corn Stalk Biochar for Pb and Cd: Preparation, Characterization, and Batch Adsorption Study

Yan

Yang

et al. 2022

Separations

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Biochar adsorption emerges as a convenient and cheap treatment technology to cope with the metal pollution in wastewater. In this study, a biochar made from corn stalks was prepared and its adsorption characteristics for two heavy metals, Pb and Cd, were investigated by materials characterization and batch experiments. Biochar pyrolyzed from waste corn stalks at 400–600 °C, where biochar prepared at 600 °C (BC600) was used to perform following experiments. In materials characterization, the SEM images were initially used to reveal an obvious porous structure feature of corn stalk biochar, followed by XPS and FT-IR analyses unraveling the effects of functional groups in adsorption, especially for phenol and carboxyl groups. These functional groups provided vital adsorption sites. In batch experiment, batch experiments were conducted under different factors such as pH, temperature, and background ionic strength. The increase of pH and temperature can improve the adsorption capacity, whereas the ionic strength showed negative effects. The adsorption processes of both metals can be interpreted by fitting pseudo-first order model, as indicated in kinetic experiments, and the adsorption isotherm can be well described by the Langmuir model. Overall, this study revealed the characteristics of corn stalk biochar and deciphered the potential adsorption mechanisms.

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Section: Introductionmentioning

confidence: 99%

The Adsorption of Corn Stalk Biochar for Pb and Cd: Preparation, Characterization, and Batch Adsorption Study

Yan

Yang

et al. 2022

Separations

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“…The peak at 660 cm −1 could be assigned to the S−O stretching vibration in the sulfate. 30 The peak in the range of 917 to 1151 cm −1 was attributed to both C−O stretching and S−O vibration. 30 The bands at 1420 and 1600 cm −1 correspond to a C−OH stretching vibration and a CC stretching vibration, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

“…Several techniques can be used to remove Cd(II) from water, such as chemical ion exchange, precipitation, membrane technologies, and adsorption. ,− Among these methods, adsorption is widely used because of its practical and economic properties for Cd(II) ion removal. − The commonly used adsorbents are metal and metal oxide nanoparticles, , clay minerals, zeolites, and carbon materials. , Carbon materials have attracted attention because of their outstanding adsorption performance, low cost, and ease of obtaining. Because of their surface charge and functional groups, the hydrochar has a high adsorption capacity for heavy metal ions, and the result has been reported in recent review papers. − …”

Section: Introductionmentioning

confidence: 93%

Synthesis of Iron-Based Carbon Microspheres with Tobacco Waste Liquid and Waste Iron Residue for Cd(II) Removal from Water and Soil

Wang

Zhang

et al. 2022

Langmuir

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Herein, a novel magnetic iron-based carbon microsphere was prepared by cohydrothermal treatment of tobacco waste liquid (TWL) and waste iron residue (WIR) to form WIR@TWL. After that, WIR@TWL was coated with sodium polyacrylate (S.P.) to fabricate WIR@TWL@SP, whose removal efficiency for bivalent cadmium (Cd(II)) was studied in water and soil. As a result, WIR@ TWL@SP possessed a high Cd(II) removal efficiency, which could reach 98.5% within 2 h. The adsorption process was consistent with the pseudo-second-order kinetic model because of the higher value of adjusted R 2 (0.99). The thermodynamic data showed that the adsorption process was spontaneous (ΔG°< 0) and exothermic (ΔH°= 32.42 KJ•mol −1 > 0). Cd(II) removal mechanisms also include cation exchange, electrostatic attraction, hydrogen-bond interaction, and cation−π interaction. Notably, pot experiments demonstrated that WIR@TWL@SP could effectively reduce Cd absorption by plants in water and soil. Thus, this study offers an effective method for remediating Cd(II)-contaminated water and soil and may have a practical application value.

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“…Vinasse as an effluent composed of 93% water and 7% solids; of these solids, about 75% are organic matter, formed of organic acids and, to a lesser extent, by cations such as K+, Ca+2 and Mg+2 and their alcoholic strength is not higher than 0.03 °GL (Araujo and Oliveira, 2020). Also, vinasse is the one with the highest pollutant content, with BOD varying from 20,000 to 35,000 mg/L, where the amount discharged by the mills varies from 10 to 16 liters of vinasse per liter of ethanol depending on the production conditions and leaves the distillation apparatus on average between 85 to 90 °C (Silva et al, 2007 andKasak &Tor, 2020).…”

Section: Resultsmentioning

confidence: 99%

“…-Guidelines for the Safe Use of Wastewater, Excreta and Greywater-Volume II-Wastewater Use in Agriculture: which presents a number of considerations regarding the use of wastewater in agriculture, seeking to benefit human health and the environment (WHO, 2006 andKazak &Tor, 2020).…”

Section: Resultsmentioning

confidence: 99%

Vinasse: current concepts, challenges and opportunities for the sustainability

Araujo¹,

Niño-Castillo

2021

EJRN

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The objective was to highlight the historical documents that foresee the use and abuse of ethanol production (vinasse) in Brazil according to literature published in the period 1934-2020. The methodology used was documentary, the review and analysis of which brought with it the synthesis and perspectives of vinasse as well as its uses and abuses. Results: a) there are legal instruments in Brzil since 1934 whose goal is to care for the environment; b) about in 1978 was prohibited the direct dumping of stillage into bodies of water and c) in 2011 environmental guidelines were provided on this topic to achieve sustainability in the Brazilian space. Conclusions: 1) as can be seen in the cited literature, vinasse is one of the most impressive respurces for ethanol production; 2) Brazil is the second largest ethanol producer worldwide; 3) the use of stillage for cooling sugarcane fiekds, its organic content, chemical and biochemical oxygen demand rates are high and 4) the synergy between academics from universities, the government sector, civil society, companies in the productive chain of the sugar energy sector, among others, is important.

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In situ preparation of magnetic hydrochar by co-hydrothermal treatment of waste vinasse with red mud and its adsorption property for Pb(II) in aqueous solution

Cited by 112 publications

References 52 publications

The Adsorption of Corn Stalk Biochar for Pb and Cd: Preparation, Characterization, and Batch Adsorption Study

The Adsorption of Corn Stalk Biochar for Pb and Cd: Preparation, Characterization, and Batch Adsorption Study

Synthesis of Iron-Based Carbon Microspheres with Tobacco Waste Liquid and Waste Iron Residue for Cd(II) Removal from Water and Soil

Vinasse: current concepts, challenges and opportunities for the sustainability

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