scholarly journals High yield carbonization and mesoporous activated carbon production from acid-treated spent coffee grounds

TANSO ◽  
2018 ◽  
Vol 2018 (282) ◽  
pp. 49-54
Author(s):  
Keisuke Kikuchi ◽  
Rie Yamashita ◽  
Satoshi Sakuragawa ◽  
Yukie Saito
Keyword(s):  
Activated Carbon ◽  
High Yield ◽  
Spent Coffee Grounds ◽  
Carbon Production ◽  
Coffee Grounds ◽  
Mesoporous Activated Carbon

High yield carbonization and mesoporous activated carbon production from acid-treated spent coffee grounds

Carbon ◽  
2021 ◽  
Vol 175 ◽  
pp. 607
Author(s):  
Keisuke Kikuchi ◽  
Rie Yamashita ◽  
Satoshi Sakuragawa ◽  
Yukie Saito
Keyword(s):  
Activated Carbon ◽  
High Yield ◽  
Spent Coffee Grounds ◽  
Carbon Production ◽  
Coffee Grounds ◽  
Mesoporous Activated Carbon

Spent coffee grounds-based activated carbon preparation for sequestering of malachite green

2016 ◽  
Author(s):  
Jun-Wei Lim ◽  
Keat-Ying Lam ◽  
Mohammed J. K. Bashir ◽  
Yin-Fong Yeong ◽  
Man-Kee Lam ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Malachite Green ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

scholarly journals Activated Carbon from Spent Coffee Grounds: A Good Competitor of Commercial Carbons for Water Decontamination

2020 ◽  
Vol 10 (16) ◽  
pp. 5598
Author(s):  
Egle Rosson ◽  
Francesco Garbo ◽  
Giovanni Marangoni ◽  
Roberta Bertani ◽  
Maria Cristina Lavagnolo ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Partition Coefficients ◽  
Activated Carbons ◽  
Organic Dyes ◽  
Bromothymol Blue ◽  
Order Kinetic ◽  
Spent Coffee Grounds ◽  
Lower Efficiency ◽  
Coffee Grounds

In the framework of the circular economy, spent coffee grounds were converted into powdered activated carbon by means of pyrolysis, using potassium hydroxide as the activating agent. Its adsorption capacity on a panel of phenolic compounds was compared with those of two commercial powdered activated carbons, after preliminary studies on organic dyes with different ionic properties, to assess the affinity between adsorbates and adsorbents. Pseudo-first-order and pseudo-second-order kinetic models were carried out, together with Freundlich and Langmuir isotherms. They were useful to calculate the breakthrough at 5%, 10%, and 50% of adsorption and the partition coefficients for the comparison of performance between different sorbent systems in a less biased manner (e.g., reducing bias associated with operational settings like sorbate concentration and sorbents dosage). The results showed that the removal efficiency for SCGs-AC was comparable with that of the commercial activated carbons with the highest partition coefficients for methylene blue (12,455 mg/g/μM, adsorption capacity = 179 mg/g) and 3-chlorophenol (81.53 mg/g/μM, adsorption capacity = 3765 mg/g). The lower efficiency in bromothymol blue and bisphenol-A adsorption was due to its different morphology and surface properties.

Study of Rhodamine B adsorption onto activated carbon from spent coffee grounds

2020 ◽  
Author(s):  
Teguh Wirawan ◽  
Soerja Koesnarpadi ◽  
Nanang Tri Widodo
Keyword(s):  
Activated Carbon ◽  
Rhodamine B ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

Pore structure and chemical composition of activated carbon derived from composted spent coffee grounds

Carbon ◽  
2021 ◽  
Vol 175 ◽  
pp. 604
Author(s):  
Keisuke Kikuchi ◽  
Rie Yamashita ◽  
Satoshi Sakuragawa ◽  
Takuya Saeki ◽  
Koji Oikawa ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Chemical Composition ◽  
Pore Structure ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

scholarly journals Preparation of Activated Carbons from Spent Coffee Grounds and Coffee Parchment and Assessment of Their Adsorbent Efficiency

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1396
Author(s):  
Gustavo A. Figueroa Campos ◽  
Jeffrey Paulo H. Perez ◽  
Inga Block ◽  
Sorel Tchewonpi Sagu ◽  
Pedro Saravia Celis ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Activated Carbons ◽  
Low Cost ◽  
Maximum Adsorption Capacity ◽  
Spent Coffee Grounds ◽  
Hydrophobic Compounds ◽  
Coffee Grounds ◽  
By Products

The valorization of coffee wastes through modification to activated carbon has been considered as a low-cost adsorbent with prospective to compete with commercial carbons. So far, very few studies have referred to the valorization of coffee parchment into activated carbon. Moreover, low-cost and efficient activation methods need to be more investigated. The aim of this work was to prepare activated carbon from spent coffee grounds and parchment, and to assess their adsorption performance. The co-calcination processing with calcium carbonate was used to prepare the activated carbons, and their adsorption capacity for organic acids, phenolic compounds and proteins was evaluated. Both spent coffee grounds and parchment showed yields after the calcination and washing treatments of around 9.0%. The adsorption of lactic acid was found to be optimal at pH 2. The maximum adsorption capacity of lactic acid with standard commercial granular activated carbon was 73.78 mg/g, while the values of 32.33 and 14.73 mg/g were registered for the parchment and spent coffee grounds activated carbons, respectively. The Langmuir isotherm showed that lactic acid was adsorbed as a monolayer and distributed homogeneously on the surface. Around 50% of total phenols and protein content from coffee wastewater were adsorbed after treatment with the prepared activated carbons, while 44, 43, and up to 84% of hydrophobic compounds were removed using parchment, spent coffee grounds and commercial activated carbon, respectively; the adsorption efficiencies of hydrophilic compounds ranged between 13 and 48%. Finally, these results illustrate the potential valorization of coffee by-products parchment and spent coffee grounds into activated carbon and their use as low-cost adsorbent for the removal of organic compounds from aqueous solutions.

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