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

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.

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Removal of Methylene Blue Dye by Using Eggshell Powder

Jurnal Teknologi ◽

10.11113/jt.v65.1648 ◽

2013 ◽

Vol 65 (1) ◽

Author(s):

Norzita Ngadi ◽

Chin Chiek Ee ◽

Nor Aida Yusoff

Keyword(s):

Methylene Blue ◽

Textile Industry ◽

Low Cost ◽

Kinetic Studies ◽

Operating Conditions ◽

Blue Dye ◽

Dye Wastewater ◽

Order Model ◽

Aquatic Life ◽

Pseudo Second Order

Dyes contain carcinogenic materials which can cause serious hazards to aquatic life and the users of water. Textile industry is the main source of dye wastewater which results in environmental pollution. Many studies have been conducted to investigate the use of low cost adsorbent as an alternative technique for the adsorption of dye. The objective of this study is to determine the potential of eggshell powder as an adsorbent for methylene blue removal and find out the best operating conditions for the color adsorption at laboratory scale. The adsorption of cationic methylene blue from aqueous solution onto the eggshell powder was carried out by varying the operating parameters which were contact time, pH, dosage of eggshell powder and temperature in order to study their effect in adsorption capacity of eggshell powder. The results obtained showed that the best operating condition for removal of methylene blue was at pH 10 (78.98 %) and temperature 50°C (47.37 %) by using 2 g of eggshell powder (57.03 %) with 30 minutes equilibrium time (41.36 %). The kinetic studies indicated that pseudo-second-order model best described the adsorption process.

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Synthesis of Adsorbent from Bagasse for Methylene Blue Adsorption

Jurnal Kimia VALENSI ◽

10.15408/jkv.v7i2.20916 ◽

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.

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