scholarly journals Black jurema bark powder as new alternative material for treatment of water containing two toxic dyes / Emprego do pó da casca de jurema preta como uma nova alternativa para o tratamento de água contendo dois corantes tóxicos

2021 ◽  
Vol 7 (11) ◽  
pp. 104282-104305
Author(s):  
Joselito Nardy Ribeiro ◽  
Araceli Verónica Flores Nardy Ribeiro ◽  
Erik Cavalcante Dybwad ◽  
Felipe Tonon Firmino ◽  
Madson de Godoi Pereira ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Methylene Blue ◽  
Aqueous Medium ◽  
Adsorption Capacity ◽  
Physical Analysis ◽  
Chemical Pollutants ◽  
Alternative Material ◽  
Stirring Time ◽  
Indigo Blue ◽  
Chemical Groups

Black jurema bark powder (BJBP) (Mimosa hostilis Benth) was studied for the removal of textile dyes Methylene Blue (MB) and Indigo Blue (IB) in water. The chemical and physical analysis of BJBP showed a heterogeneous surface with chemical groups capable to interact with MB and IB. The experiments were optimized for use of 1g of BJBP and stirring time of 3 minutes for IB, and 0.5g of BJBP and stirring time of 2 minutes for MB. The maximum adsorptive capacities for IB (115.21 mg/g) and MB (3.50 mg/g), obtained through the Langmuir Mathematical Model, were favorable for the use of BJBP as an adsorbent in water containing both dyes. The results obtained in this work suggest BJBP as a new alternative for the removal of IB and MB in aqueous medium. Besides, this work stimulates new studies to evaluate the BJBP adsorption capacity for other chemical pollutants.

Investigation on nanographene generation and its molecule adsorption

2019 ◽  
Vol 9 (7) ◽  
pp. 813-820
Author(s):  
Junxia Zhang ◽  
Zehua Wang ◽  
Binwu Wang ◽  
Xiaopeng Song
Keyword(s):  
Methylene Blue ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Experimental Method ◽  
Adsorption Capacity ◽  
Absorption Capacity ◽  
Molecule Adsorption ◽  
Stirring Time ◽  
Scanning Electron ◽  
Peak Value

An experimental method was applied to prepare nanographene, in which its surface feature was analyzed using scanning electron microscope and Fourier infrared ray analyzer. A methylene blue (MB) solution was adopted to measure the molecule adsorption of nanographene and graphite and demonstrated that nanographene had more molecule adsorption than that by graphite. As the concentration of MB solution increased, the molecule adsorption of nanographene ascended. As the stirring time of a magnetic stirrer decreased, the molecule adsorption of nanographene in the MB solution increased significantly. Meanwhile, the increment in the absorption amount of graphite reduced. As the dosage of nanographene and graphite increased, the absorption capacity of nanographene reached a peak value of 40 mg, which was two- or threefold higher than that of graphite. Hence, nanographene has higher molecule adsorption capacity than graphite.

Effect of Stirring Time on Methylene Blue Adsorption onto Graphene Oxides Surfaces

2021 ◽  
Vol 1028 ◽  
pp. 291-295
Author(s):  
Jedija M. Aurellia ◽  
Gita Maulida ◽  
Diyan Unmu Dzujah ◽  
Norman Syakir ◽  
Fitrilawati
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Room Temperature ◽  
Industrial Sector ◽  
Experimental Results ◽  
Graphene Oxides ◽  
Dye Pollutants ◽  
Stirring Time ◽  
Mb Adsorption

Dyes disposal from the industrial sector into the environment greatly affects the quality of the water. Among various technologies of removing dye pollutants from wastewater, adsorption is one of the most effective and favorable methods. Graphene oxides (GO) has been applied to remove dye pollutants in solution since it has a lot of oxygen-containing groups that can attract and bind pollutants. We study the effect of stirring time on MB adsorption onto GO surfaces. We mixed MB solution with GO dispersion and stirred at varied stirring times. The mixture was kept at room temperature to allow precipitation of the GO-MB mixture and then filtered to separate the precipitate from the residual MB solution. A reduction of MB concentration in the solution was measured using spectroscopy. The experimental results show that MB was adsorbed very fast onto GO surfaces in the first minutes and then the rate of the reduction of MB concentration becomes slower. After the stirring for 60 minutes, almost there is no significant change of the MB concentration that indicated a limit of adsorption capacity of GO.

Study on Adsorption of Methylene Blue on Mold/Bentonite Composite Adsorbent in Aqueous Solution

2013 ◽  
Vol 295-298 ◽  
pp. 408-412
Author(s):  
Gui Ping Liu ◽  
Xing Zhu ◽  
Yong Ci Liu ◽  
Qi Rui Zhao
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Adsorption Thermodynamics ◽  
Dyeing Wastewater ◽  
Composite Adsorbent ◽  
Initial Concentration ◽  
Standing Time ◽  
Freundlich Equation ◽  
Monolayer Adsorption ◽  
Stirring Time

This study intends to explore the application of treating Methylene Blue dyeing wastewater with an inexpensive adsorbent compounded with . It studied the adsorption kinetics and adsorption thermodynamics of MB-Mold/Bentonite system. And single factor investigation were also conducted, including dosage, initial concentration, pH, stirring time and standing time. The results showed that the Methylene Blue system fitted second-order kinetics with 62.11mg/g saturated adsorption capacity. While the adsorption isotherms fitted Freundlich equation well(monolayer adsorption), with 61.49mg/g adsorption capacity. And the removal was above 99%, when the dosage of composite absorbent was 8g/L, pH was nature (5.6), stirring time was 15min and standing time was 1h .

Analisis Variasi Temperatur Aktivasi Terhadap Daya Serap Arang Aktif Tandan Aren (Arenga Pinnata Merr) Dengan Agen Aktivasi Potassium Silicate(K2SiO3)

2020 ◽  
Vol 5 (3) ◽  
pp. 221
Author(s):  
Muhammad Azam ◽  
Muhammad Anas ◽  
Erniwati Erniwati
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Temperature Variation ◽  
Chemical Activation ◽  
Weight Ratio ◽  
Potassium Silicate ◽  
Physical Activation ◽  
Activation Temperature ◽  
Pyrolysis Reactor

This study aims to determine the effect of variation of activation temperature of activated carbon from sugar palm bunches of chemically activatied with the activation agent of potassium silicate (K2SiO3) on the adsorption capacity of iodine and methylene blue. Activated carbon from bunches of sugar palmacquired in four steps: preparationsteps, carbonizationstepsusing the pyrolysis reactor with temperature of 300 oC - 400 oC for 8 hours and chemical activation using of potassium silicate (K2SiO3) activator in weight ratio of 2: 1 and physical activation using the electric furnace for 30 minutes with temperature variation of600 oC, 650 oC, 700 oC, 750 oC and 800 oC. The iodine and methyleneblue adsorption testedby Titrimetric method and Spectrophotometry methodrespectively. The results of the adsorption of iodine and methylene blue activated carbon from sugar palm bunches increased from 240.55 mg/g and 63.14 mg/g at a temperature of 600 oC to achieve the highest adsorption capacity of 325.80 mg/g and 73.59 mg/g at temperature of 700 oC and decreased by 257.54 mg/g and 52.03 mg/g at a temperature of 800 oCrespectively.However, it does not meet to Indonesia standard (Standard Nasional Indonesia/SNI), which is 750 mg/g and 120 mg/g respectively.

scholarly journals One-step synthesis of nitrogen-grafted copper-gallic acid for enhanced methylene blue removal

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shella Permatasari Santoso ◽  
Vania Bundjaja ◽  
Artik Elisa Angkawijaya ◽  
Chintya Gunarto ◽  
Alchris Woo Go ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Gallic Acid ◽  
Synthesis Method ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
One Step ◽  
Detailed Assessment ◽  
Higher Temperature

AbstractNitrogen-grafting through the addition of glycine (Gly) was performed on a metal- phenolic network (MPN) of copper (Cu2+) and gallic acid (GA) to increase its adsorption capacity. Herein, we reported a one-step synthesis method of MPN, which was developed according to the metal–ligand complexation principle. The nitrogen grafted CuGA (Ng-CuGA) MPN was obtained by reacting Cu2+, GA, and Gly in an aqueous solution at a molar ratio of 1:1:1 and a pH of 8. Several physicochemical measurements, such as Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), N2 sorption, X-ray diffraction (XRD), and thermal gravimetry analysis (TGA), were done on Ng-CuGA to elucidate its characteristics. The analysis revealed that the Ng-CuGA has non-uniform spherical shaped morphology with a pore volume of 0.56 cc/g, a pore size of 23.25 nm, and thermal stability up to 205 °C. The applicational potential of the Ng-CuGA was determined based on its adsorption capacity against methylene blue (MB). The Ng-CuGA was able to adsorb 190.81 mg MB per g adsorbent at a pH of 6 and temperature of 30 °C, which is 1.53 times higher than the non-grafted CuGA. Detailed assessment of Ng-CuGA adsorption properties revealed their pH- and temperature-dependent nature. The adsorption capacity and affinity were found to decrease at a higher temperature, demonstrating the exothermic adsorption behavior.

scholarly journals Enhanced Performance of Hydrogen Peroxide Modified Pozzolan-Based Geopolymer for Abatement of Methylene Blue from Aqueous Medium

Silicon ◽  
2021 ◽  
Author(s):  
Dzoujo T. Hermann ◽  
Sylvain Tome ◽  
Victor O. Shikuku ◽  
Jean B. Tchuigwa ◽  
Alex Spieß ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Methylene Blue ◽  
Aqueous Medium

Ouricuri (Syagrus coronata) fiber: a novel biosorbent to remove methylene blue from aqueous solutions

2016 ◽  
Vol 75 (1) ◽  
pp. 106-114 ◽  
Author(s):  
Lucas Meili ◽  
Társila Santos da Silva ◽  
Daniely Carlos Henrique ◽  
João Inácio Soletti ◽  
Sandra Helena Vieira de Carvalho ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Experimental Design ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Fiber Diameter ◽  
Aqueous Media ◽  
Process Efficiency ◽  
Maximum Adsorption Capacity ◽  
Equilibrium Studies

In this work, the potential of ouricuri (Syagrus coronata) fiber as a novel biosorbent to remove methylene blue (MB) from aqueous solutions was investigated. The fiber was prepared and characterized according to the fundamental features for adsorption. A 23 experimental design was used to evaluate the effects of adsorbent dosage (M), fiber diameter (D) and agitation (A) on the adsorption capacity. In the more adequate conditions, kinetic and equilibrium studies were performed. The experimental design results showed that M = 10 g L−1), D = 0.595 mm and A = 200 rpm were the more adequate conditions for MB adsorption. Based on the kinetic study, it was found that the adsorption process was fast, being the equilibrium was attained at about 5 min, with 90% of color removal. The isotherm was properly represented by the Sips model, and the maximum adsorption capacity was 31.7 mg g−1. In brief, it was demonstrated that ouricuri fiber is an alternative biosorbent to remove MB from aqueous media, taking into account the process efficiency and economic viewpoint.

Removal of methylene blue dye from aqueous medium by nano poly acrylonitrile particles

2012 ◽  
Vol 44 (1-3) ◽  
pp. 151-160 ◽  
Author(s):  
Mohamed Samir Mohy Eldin ◽  
S.A. El-Sakka ◽  
M.M. El-Masry ◽  
I.I. Abdel-Gawad ◽  
S.S. Garybe
Keyword(s):  
Methylene Blue ◽  
Aqueous Medium ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Poly Acrylonitrile
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