Microwave Synthesized Carbon Materials as Low-cost and Efficient Adsorbents for the Removal of Antibiotics in Single and Binary Systems

Author(s):  
Abisola O. Egbedina ◽  
Kayode O. Adebowale ◽  
Bamidele I. Olu-Owolabi ◽  
Emmanuel I. Unuabonah ◽  
Mofoluwake A. Adeyemo
RSC Advances ◽  
2017 ◽  
Vol 7 (89) ◽  
pp. 56375-56381 ◽  
Author(s):  
Xinxin Jin ◽  
Yu Jiang ◽  
Qi Hu ◽  
Shaohua Zhang ◽  
Qike Jiang ◽  
...  

Low-cost dual transition metal (Fe and Co) based non-noble metal electrocatalysts (NNMEs) with large surface area and porous structure boost oxygen reduction reaction (ORR) performance in alkaline solution.


2021 ◽  
Vol 193 ◽  
pp. 110594
Author(s):  
Hanbo Chen ◽  
Peng Qin ◽  
Xing Yang ◽  
Amit Bhatnagar ◽  
Sabry M. Shaheen ◽  
...  

2021 ◽  
Vol 12 (2) ◽  
pp. 2022-2040

Almond shell (AS) is a low-cost adsorbent used in this study for the removal of methylene blue (MB), crystal violet (CV), and Congo red (CR) from an aqueous solution in single and mixture binary systems. The low-cost adsorbent was characterized by FTIR and SEM analysis. The effects of AS dose, contact time, initial dye concentration, pH, and temperature on MB, CV, and CR adsorption were studied in a single system. In a binary system, the MB, CV, and CR were removed from the mixture of MB+CR, CV+MB, and CV+CR with a percentage in volume ranging from 0 to 100 % in MB and CV, and CR. Kinetic studies showed rapid sorption following a second-order kinetic model with of contact time of 10 min. The modulation of adsorption isotherms showed that retention follows the Langmuir model. The thermodynamic parameters proved that the MB, CV, and CR adsorption process was feasible, spontaneous, and exothermic. The synergy adsorption between dyes in a binary mixture of MB+CR and CV+CR, while the competition adsorption between dyes in a binary mixture of MB+ CV.


Author(s):  
Lwazi Ndlwana ◽  
Naledi Raleie ◽  
Mogolodi Dimpe ◽  
Hezron Ogutu ◽  
Mxolisi M Motsa ◽  
...  

There is great importance and need of improving existing carbon materials fabrication methods. As such, this work proposes to discuss, interrogate, and propose viable hydrothermal, solvothermal, and other advanced carbon materials synthetic methods. The advanced carbon materials to be interrogated will include the synthesis of carbon dots, carbon nanotubes, nitrogen/titania-doped carbons, graphene quantum dots, and their nanocomposites with solid/polymeric/metal oxide supports. This will be done with special mind to microwave-assisted solvothermal and hydrothermal synthesis due to their favourable properties such as rapidity, low cost, and green/environmentally-friendliness. Thus, these methods are important during the current and future synthesis and modification of advanced carbon materials for application in energy, gas separation, sensing, and water treatment. Simultaneously, the work will pay special cognizance to methods reducing the fabrication costs and environmental impact while enhancing the properties as a direct result of the synthesis methods. As a direct result, the expectation is to impart a significant contribution to the scientific body of work regarding the improvement of the said fabrication methods.


2020 ◽  
Vol 8 (8) ◽  
pp. 4376-4385 ◽  
Author(s):  
Youyi Lei ◽  
Xinmiao Liang ◽  
Li Yang ◽  
Ping Jiang ◽  
Zhenyu Lei ◽  
...  

Low-cost hierarchical porous carbon materials with a controllable structure for supercapacitors and lithium selenium batteries.


2018 ◽  
Vol 34 (4) ◽  
pp. 2043-2050 ◽  
Author(s):  
Buhani Buhani ◽  
Megafhit Puspitarini ◽  
Rahmawaty Rahmawaty ◽  
Suharso Suharso ◽  
Mita Rilyanti ◽  
...  

In this research, it has been performed carbon activation of oil palm shells (CAC) prepared by chemical treatment as adsorbents of phenol and methylene blue (MB) in solution either in the form of single or in pair solution. The activation of carbon from the oil palm shells was done physically at a temperature of 700°C for 1 hour continued with chemical activation using 10% H3PO4 for 24 hours. Identification of functional groups on the carbon from oil palm shell before and after chemically activated was performed using infrared spectrophotometer (IR) and analysis of its surface morphology was carried out using scanning electron microscope (SEM). The phenol and MB adsorption process was performed in single and binary systems using the batch method. The adsorption of phenol on CAC is optimum at pH 8 while MB at pH 11 with optimum contact time of 90 min for phenol and 120 min for MB respectively. The phenol and MB adsorption data on the CAC in the single system follow the pseudo-second-order kinetics model with the adsorption rate constant of 0.399 and 0.769 g mmol-1 min-1 respectively. The adsorption isotherms of phenol and MB in CAC tend to follow Freundlich adsorption isotherm pattern with the adsorption intensity factor (n) for phenol, MB, phenol/MB, and MB/phenol: 1.739, 1.341, 1.334, and 1.293 respectively. The adsorbent of CAC is effective to remove phenol and MB in solution, either in single or paired condition.


2020 ◽  
pp. 114586
Author(s):  
Lorena Delgadillo-Velasco ◽  
Virginia Hernández-Montoya ◽  
Luis A. Ramírez-Montoya ◽  
Miguel A. Montes-Morán ◽  
Ma. del Rosario Moreno-Virgen ◽  
...  

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