scholarly journals Application of Spent Li-Ion Batteries Cathode in Methylene Blue Dye Discoloration

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Eric M. Garcia ◽  
Hosane A. Taroco ◽  
Ana Paula C. Madeira ◽  
Amauri G. Souza ◽  
Rafael R. A. Silva ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Mechanism Study ◽  
Promising Alternative ◽  
Blue Discoloration ◽  
Li Ion

This paper aims to present the mechanism study of methylene blue (MB) discoloration using spent Li-ion battery cathode tape and hydrogen peroxide. The recycled cathode used in this work is composed of 72% of LiCoO2, 18% of carbon, and 10% of Al. The value found for surface area is 8.9 m2/g and the ZCP value occurs in pH = 2.95. Different from what is proposed in the literature, the most likely mechanism of methylene blue discoloration is the oxidation/delitiation of LiCoO2 and the reduction of H2O2 forming OH∙. Thus, in this paper, an important and promising alternative for discoloration of textile industry dyes using spent Li-ion battery cathode is presented.

Synthesis of Adsorbent from Bagasse for Methylene Blue Adsorption

2021 ◽  
Vol 7 (2) ◽  
pp. 188-195
Author(s):  
Nurhasni Nurhasni ◽  
Sariana Harahap ◽  
Ahmad Fathoni ◽  
Hendrawati Hendrawati
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Contact Time ◽  
Ph Effect ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Batch Method ◽  
Homogeneous Surface ◽  
Dyeing Process ◽  
Ft Ir

The ability of bagasse adsorbents to adsorb methylene blue without activation using 0.5 M H2SO4 solution was examined. Methylene blue is widely used in the textile industry because it produces bright colors, and the dyeing process is fast and easy. This research aims to determine the optimum adsorption conditions, namely the variations in contact time, dye concentration, adsorbent mass, and pH effect on methylene blue, which were carried out using the batch method. Furthermore, the adsorbents were characterized by FT-IR and SEM. The optimum state of the bagasse adsorbent to adsorb methylene blue dye has a mass of 0.5 grams, a contact time of 30 minutes, a concentration of 50 ppm, and a pH of 5. The character of the adsorbent after activation with H2SO4 was better than without activation. The highest adsorption efficiency of methylene blue dye in the batch method was 99.67%. The FTIR spectrum of the bagasse adsorbent showed OH, C-H, C=O, C=C, and C-O functional groups. The adsorption isotherm model for methylene blue dye follows the Langmuir isotherm since the graph obtained is linear with the correlation coefficient (R2) = 1, where the adsorbent has a homogeneous surface.

scholarly journals Adsorption of methylene blue dye by different methods of obtaining shrimp residue chitin

2021 ◽  
pp. 1-10
Author(s):  
Iliane Muller Otto ◽  
Luiza Beatriz Gamboa Araújo Morselli ◽  
Dienifer Aline Braun Bunde ◽  
Simone Pieniz ◽  
Maurízio Silveira Quadro ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Technological Development ◽  
Low Cost ◽  
Effluent Treatment ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Solubility In Water ◽  
Toxic Potential ◽  
Socioeconomic Benefits

The textile industry, very important for the world economy, generates an effluent containing dyes, and which, when discarded in water bodies without proper treatment, can cause impacts to human health and the environment. One of these widely used dyes is methylene blue, whose characteristics are high solubility in water and its toxic potential, and which effects range from eye irritations, nausea, vomiting and even mental confusion. Among the potential adsorbents of this dye is chitin, which is a biopolymer extracted from the shrimp exoskeleton. Aiming at the development of a low-cost adsorbent material with potential use in the textile effluent treatment industry, the ability to remove methylene blue dye by shrimp residue chitin, obtained by eleven different methodologies, was verified. The three most efficient treatments reached approximately 75% of dye removal, proving the high adsorption power of shrimp residue. In addition to providing technological development of materials, the research brings socioeconomic benefits to the fishermen’s colony with the use of shrimp residue for the adsorption of other waste from the textile industry, contributing to the sustainability of both activities and reducing the environmental impact.

Biosorption of methylene blue dye by rice (Oryza sativa L.) straw: adsorption and mechanism study

2020 ◽  
Vol 190 ◽  
pp. 322-330
Author(s):  
Ali H. Jawad ◽  
Nurul Nadiah Mohd Firdaus Hum ◽  
Ahlam M. Farhan ◽  
Mohd Sufri Mastuli
Keyword(s):  
Methylene Blue ◽  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Mechanism Study
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