Methylene Blue removal efficiency on activated carbon from Egyptian rice hulls exceeds 99% at 25°C, with a pH-dependent process and optimal removal at 5-9 pH, and smaller adsorbent particles.

Study of adsorption isotherms and kinetic models for Methylene Blue adsorption on activated carbon developed from Egyptian rice hull (Part II).

Methylene blue adsorption on Ephedra strobilacea char, modified with phosphoric acid, and zinc chloride adsorbents is endothermic and spontaneous, with optimal pH values of 8, 6 and 9.

Kinetics, equilibrium studies and thermodynamics of methylene blue adsorption on Ephedra strobilacea saw dust and modified using phosphoric acid and zinc chloride

The best conditions for methylene blue removal by single-walled carbon nanotubes-amine are 20 mg/L initial concentration, 0.05 g SWCNT-NH2, pH 9, and 50°C, with spontaneous and endothermic adsorption.

Taguchi L9 (34) orthogonal array study based on methylene blue removal by single-walled carbon nanotubes-amine: Adsorption optimization using the experimental design method, kinetics, equilibrium and thermodynamics

Green and black olive stones are cost-effective and promising adsorbents for cationic methylene blue dye removal from wastewater, with green olive stones being more efficient at higher concentrations and 45°C being the optimal temperature.

Mechanistic understanding of the adsorption and thermodynamic aspects of cationic methylene blue dye onto cellulosic olive stones biomass from wastewater

TPEG effectively removes methylene blue from wastewater, with optimal performance at pH 11, and can be reused 5 times after a simple chemical regeneration with HCl.

Methylene blue adsorption on thermo plasma expanded graphite in a multilayer column system.

Oil palm leaves effectively remove 88.72% of methylene blue from aqueous solutions, with optimal conditions at 2.22 g/L, pH 6, initial MB concentration of 259 mg/L, and temperature of 53 °C.

Adsorption of methylene blue onto oil palm (Elaeis guineensis) leaves: Process optimization, isotherm, kinetics and thermodynamic studies

Jute fiber activated carbon effectively removes methylene blue from aqueous solutions, with an optimum pH of 5-10 and a capacity of 225.64 mg/g, using intraparticle diffusion as the best model.

Adsorption of methylene blue onto jute fiber carbon: kinetics and equilibrium studies.

Pineapple leaf powder shows potential as an economical adsorbent for removing methylene blue from aqueous solutions, with adsorption favoring higher pH and lower temperature.

Removal of methylene blue from aqueous solution by adsorption onto pineapple leaf powder.

Raw Algerian kaolin effectively removes Methylene Blue from aqueous solutions, making it a low-cost alternative to commercial adsorbents.

Removal of Methylene Blue from aqueous solutions by adsorption on Kaolin: Kinetic and equilibrium studies

The best adsorbent from biowaste, brown seaweed hydrochars, effectively removes >99% of methylene blue dye from wastewater, with optimal conditions being lower initial concentration, pH 6, and 84 minutes of contact time.

Response Surface Modelling of Methylene Blue Adsorption onto Seaweed, Coconut Shell and Oak Wood Hydrochars

Sodium alginate-flax seed ash beads effectively remove methylene blue from wastewater, with a maximum adsorption capacity of 333.3 mg/g at pH 7 and 50°C.

Adsorption of methylene blue on sodium alginate-flax seed ash beads: Isotherm, kinetic and thermodynamic studies.

Banana pseudo stem biochar shows potential as an efficient, low-cost, and environmentally friendly adsorbent for removing methylene blue from aqueous solutions.

Methylene Blue Adsorption by Acid Post-Treated Low Temperature Biochar Derived from Banana (Musa acuminata) Pseudo Stem

Wet-torrefied microalgal biochar effectively removes toxic dyes methylene blue and Congo red, offering a low-cost, waste-derived adsorbent for environmental applications.

Adsorptive removal of cationic methylene blue and anionic Congo red dyes using wet-torrefied microalgal biochar: Equilibrium, kinetic and mechanism modeling.

Garlic peel, an agricultural waste biomass, shows potential as an alternative for costly adsorbents used for dye removal.

Batch adsorption of methylene blue from aqueous solution by garlic peel, an agricultural waste biomass.

Sodium hydroxide-activated Casuarina empty fruit carbons show promising adsorption properties for methylene blue and congo red removal, with endothermic and spontaneous adsorption at high solution temperatures.

Sodium hydroxide-activated Casuarina empty fruit: Isotherm, kinetics and thermodynamics of methylene blue and congo red adsorption

Defatted olive cake activated carbon shows good potential for commercial applications due to its high adsorption efficiency for methylene blue and acid blue 29.

Mesoporous and high-surface-area activated carbon from defatted olive cake by-products of olive mills for the adsorption kinetics and isotherm of methylene blue and acid blue 29

Auricularia Auricular (edible fungi) effectively removes methylene blue from aqueous solutions, with adsorption capacity varying between 208.33 mg/g and 263.16 mg/g, depending on dye concentration, pH, and adsorbent dose.

A novel adsorbent Auricularia Auricular for the removal of methylene blue from aqueous solution: Isotherm and kinetics studies

The sodium alginate-based hydrogel nanocomposite effectively removes methylene blue from aqueous solutions, making it a promising candidate for water treatment applications.

Development of a sodium alginate-based organic/inorganic superabsorbent composite hydrogel for adsorption of methylene blue.

Activated carbon prepared from phosphoric acid treated eucalyptus residue shows high methylene blue adsorption capacity, offering potential for efficient industrial scale dye wastewater treatment.

High adsorption of methylene blue by activated carbon prepared from phosphoric acid treated eucalyptus residue

Soursop wastes and sugarcane bagasse effectively remove over 90% of methylene blue from aqueous media, with a multi-molecular adsorption process and physisorption process.

Adsorption of methylene blue on agroindustrial wastes: Experimental investigation and phenomenological modelling.

What is the optimal ph for methylene blue adsorption?

These studies suggest the optimal pH for methylene blue adsorption generally ranges from 5 to 11.