Mildly Alkaline Preparation and Methylene Blue Adsorption Capacity of Hierarchical Flower-like Sodium Titanate

2013 ◽  
Vol 5 (23) ◽  
pp. 12654-12662 ◽  
Author(s):  
Miao Feng ◽  
Wen You ◽  
Zhongsheng Wu ◽  
Qidi Chen ◽  
Hongbing Zhan
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Sodium Titanate ◽  
Methylene Blue Adsorption

Synthesis and characterization of pecan nutshell-based adsorbent with high specific area and high methylene blue adsorption capacity

2019 ◽  
Vol 276 ◽  
pp. 570-576 ◽  
Author(s):  
Hugo H.C. Lima ◽  
Rogério S. Maniezzo ◽  
Maria E.G. Llop ◽  
Vincente L. Kupfer ◽  
Pedro A. Arroyo ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Specific Area ◽  
Synthesis And Characterization ◽  
Methylene Blue Adsorption ◽  
Pecan Nutshell ◽  
High Specific Area

Characterization of Adsorbents Derived from Palm Fiber Waste and its Potential on Methylene Blue Adsorption

2020 ◽  
Vol 841 ◽  
pp. 273-277
Author(s):  
Ariany Zulkania ◽  
Muhammad Iqbal ◽  
Syamsumarlin
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Phosphoric Acid ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Methylene Blue Adsorption ◽  
Palm Fiber ◽  
Methylene Blue Removal ◽  
Phosphoric Acid Concentration

In this study, two types of adsorbent including activated carbon and bio-sorbent were produced from Palm fiber wastes (PFW), which were activated by phosphoric acid. The influence of adsorbent type and phosphoric acid concentration on methylene blue adsorption was investigated. The most optimum adsorbent was determined based on adsorption capacity and removal percentage of each adsorbent. The result shows that 9.984 mg/g of adsorption capacity and 99.84% of removal percentage were achieved in 90 minutes’ adsorption, which demonstrates the huge potential of bio-sorbent and was chosen to be the most optimum adsorbent based on methylene blue removal. The characterization of bio-sorbent was then investigated using FTIR and SEM. FTIR result shows that bio-sorbent contains cellulose which affected the adsorption process while SEM result shows the cleaner pores and surface compared to bio-sorbent before activation.

scholarly journals Investigation of methylene blue adsorption capacity of porous chitosan particles

2020 ◽  
Vol 2 (SI2) ◽  
pp. First
Author(s):  
Trần Quang Ngọc ◽  
Hoang Thi Trang Nguyen ◽  
Vo Nhat Thang
Keyword(s):  
Methylene Blue ◽  
Porous Structure ◽  
Adsorption Capacity ◽  
Textile Industry ◽  
Great Influence ◽  
Sio2 Nanoparticles ◽  
Desorption Process ◽  
Methylene Blue Adsorption ◽  
Porous Chitosan ◽  
Naoh Solution

Chitosan obtained from shrimp shells and SiO2 nanoparticles obtained from rice husk ash were used to synthesize chitosan - SiO2 composite materials. In order to obtain a porous chitosan adsorbent, the SiO2 particles in the chitosan - SiO2 composite material were removed with NaOH solution. With the orientation of applying adsorbent in wastewater treatment of textile industry, the ability of methylene blue adsorption of chitosan with porous structure has been investigated. Survey results show that chitosan has porous structure with good adsorption capacity of methylene blue. The adsorption capacity of materials depends on many factors such as: structure of particles; pH of adsorption medium and temperature. Adsorbent material is made of composite chitosan - SiO2 with the ratio of chitosan/SiO2 equal to 1/1 (w/w) with the best adsorption capacity. Materials with good adsorption capacity at pH = 6, at low pH, the adsorption capacity of the material is significantly reduced. Temperature has a great influence on the adsorption capacity of the material. The suitable temperature for adsorption of materials is 40 oC. With a higher temperature, the desorption process will be accelerated. This makes the adsorption capacity of the material decrease. The maximum methylene blue adsorption capacity of the material is determined about 7.25 mg/g after 40 minutes of adsorption time.

scholarly journals ISOTHERM, KINETICS AND THERMODYNAMICS ADSORPTION STUDIES OF DYE ONTO Fe3O4-WASTE PAPER ACTIVATED CARBON COMPOSITES

2020 ◽  
Vol 83 (1) ◽  
pp. 45-55
Author(s):  
Adel Fisli ◽  
Rahma Dina Safitri ◽  
Nurhasni Nurhasni ◽  
Sari Hasnah Dewi ◽  
Deswita Deswita
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Water Solution ◽  
Waste Paper ◽  
Carbon Composites ◽  
Maximum Adsorption Capacity ◽  
Adsorption Model ◽  
Methylene Blue Adsorption ◽  
Pseudo Second Order

This paper focused on the studying of adsorption properties of Fe3O4-waste paper activated carbon composites for the removal of methylene blue dyes from water. The various parameters were carried out for the adsorption test of the composites, namely; contact time, adsorbent dose, initial MB concentration, pH solution, and temperature. The adsorption of isotherm, thermodynamics and kinetic was used to determine the characteristics of methylene blue adsorption onto the prepared adsorbent. The result indicates that the optimum adsorption capacity has occurred at pH = 6 in water solution. The adsorption capacity increase as the temperature increase until at 315K (45oC). The Langmuir isotherm is more appropriate to be applied as the adsorption model with the maximum adsorption capacity (qm) value of 101 and 93 mg/g for KA HCl-Fe3O4 and KA-Fe3O4 composites, respectively. The value of adsorption thermodynamic parameters was positive for ΔH, negative for ΔGo and positive for ΔSo, meaning the process adsorptions were endothermic, feasibility and spontaneity and randomness, respectively. The pseudo-second-order model was appropriate to predict the kinetic models for methylene blue adsorption onto the composites. The obtained adsorbent composites possess high adsorption efficiency and rapid magnetic separation. They were a promising for practical wastewater treatment for dyes removal from water.

scholarly journals Modelling and Optimizing the Removal of Methylene Blue by a Mixture of Titaniferous Sand and Attapulgite Using Complete Factorial Design

2021 ◽  
Vol 17 (40) ◽  
pp. 88
Author(s):  
Kalidou Ba ◽  
Alpha Ousmane Toure ◽  
El Hadji Moussa Diop ◽  
Falilou Mbacke Sambe ◽  
Codou Guéye Mar Diop
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Desirability Function ◽  
Second Order ◽  
Order Kinetic ◽  
Methylene Blue Adsorption ◽  
Charge Potential ◽  
Adsorbate Concentration ◽  
Order Kinetic Model ◽  
Pseudo Second Order

This paper focuses on the removal of methylene blue by adsorption using a mixture of titaniferous sand and attapulgite. The different adsorbents were characterized by X-ray fluorescence spectroscopy and their different parameters such as pH, zero charge potential, and specific surface area were determined. The experiments performed were optimized and modeled by a full 2-level and 4-factor design. The four factors are the ratio of titaniferous sand and attapulgite, the concentration of methylene blue, pH, and time. These vary from 4 to 19, 20 to 100 mg/L, 2 to 9, and 30 to 150 min respectively. The study of the effects of the different factors showed that the effect of methylene blue concentration and pH significantly influence the adsorption capacity and removal efficiency of the dye. The optimum parameters (adsorbent ratio, adsorbate concentration, pH and time) obtained for the adsorption capacity through the desirability function are: 19, 100mg/L, 9 and 150min. Those obtained for the yield are: 4, 100mg/L, 9, 150min. The pseudo second order adsorption kinetics gave an equilibrium adsorption capacity qe (calculated) = 7.6863 mg/g which is almost equal to that obtained experimentally qe (exp) = 7.3562 mg/g. This shows that the pseudo second order kinetic model is the adequate mathematical model to describe the methylene blue adsorption phenomenon on the mixture of titaniferous sand and attapulgite. The thermodynamic study showed that the methylene blue adsorption reaction is exothermic, non-spontaneous, and the degree of disorder of the particles at the adsorbing surface decreases.

Biodegradable poly(butylene succinate-co-terephthalate) nanofibrous membranes functionalized with cyclodextrin polymer for effective methylene blue adsorption

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 108240-108246 ◽  
Author(s):  
Zhenzhen Wei ◽  
Yinli Liu ◽  
Hongmei Hu ◽  
Jianyong Yu ◽  
Faxue Li
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Butylene Succinate ◽  
Methylene Blue Adsorption ◽  
Cyclodextrin Polymer ◽  
Biodegradable Poly ◽  
Nanofibrous Membranes ◽  
First Time

PBST and PBST/CDP nanofibrous membranes were prepared for the first time. PBST/CDP membranes were fabricated by means of in situ polymerization. The morphologies of membranes were dependent on the CDP content. PBST/CDP membranes exhibited excellent adsorption capacity.

Hemicellulose-Based Porous Hydrogel for Methylene Blue Adsorption

2012 ◽  
Vol 560-561 ◽  
pp. 482-487 ◽  
Author(s):  
Zhan Xin Jing ◽  
Xiao Feng Sun ◽  
Qing Ye ◽  
Ya Jing Li
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Adsorption Mechanism ◽  
Maximum Adsorption Capacity ◽  
Methylene Blue Adsorption ◽  
Monolayer Adsorption ◽  
Effects Of Ph ◽  
Alkaline Conditions ◽  
Ft Ir ◽  
Porous Hydrogel

Hemicellulose-based porous hydrogel for methylene blue adsorption from aqueous solution was studied. The surface morphology of sample was analyzed by SEM, finding that it had the porous structure. Effects of pH and initial concentration on the adsorption capacity were investigated. Isotherm studies found that the adsorption of metylene blue onto absorbent was a monolayer adsorption, and the maximum adsorption capacity was 444.44 mg/g. The adsorption mechanism was analyzed by FT-IR, and it showed that the produced -COO- groups in alkaline conditions were advantaged for adsorption process, which offers the impetus for combination of adsorbent and methylene blue. Hemicellulose-based porous hydrogel is an inexpensive and biodegradable material, and can be a promising absorbent for cationic removing from wastewater.

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