scholarly journals Research application of K2CO3 activated coal coal and processing by HNO3 from cake shoulder to process Methylene Blue color

2020 ◽  
Vol 4 (1) ◽  
pp. First
Author(s):  
Dao Minh Trung
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Functional Groups ◽  
Carbon Surface ◽  
Cellulose Content ◽  
Blue Color ◽  
Surface Functional Groups ◽  
Research Application ◽  
Grain Processing ◽  
Activated Coal

Macadamia is a tree that produces dried fruits, with each ton of macadamia seeds producing 70 - 77% of the shell. Annually, the grain processing companies in Vietnam produce thousands of tons of seeds and release tens of thousands of tons of shells. As the demand for macadamia nuts is constantly increasing in the market, more in-depth studies are needed to handle this agricultural residue. Macadamia shell has a higher surface area than other seed pods and their ash content is very low at only 0.22%, the cellulose content in the shell is about 41.2%, this shows that Macadamia shell has the potential to prepare activated carbon when burning at high temperatures. The activated carbon surface can be modified appropriately to change adsorption characteristics, forming different types of surface functional groups (oxygen functional groups, carbon surface functional groups, carbon functional groups, carbon - nitrogen, carbon - halogen) and make coal more suitable for special applications. Results of researching to prepare bio-denatured material from activated carbon K2CO3 by chemical method using HNO3 agent with optimal denaturing conditions such as concentration of 21%, denaturation time of 12 hours, degree MB adsorption reached 193.13 mg/g. The results of methylene blue adsorption adsorption tests at the optimal conditions show that at pH = 9.5 with the appropriate dose of coal is 1g/L in 120 minutes, it can be processed to reach 79.36% efficiency for water. Methylene Blue waste is 70 mg/L.

scholarly journals Research application coal material is prepared from maccadamia peel and denatured by H2O2 to treat methylene blue

2020 ◽  
Vol 3 (2) ◽  
pp. 96-104
Author(s):  
Dao Minh Trung
Keyword(s):  
Methylene Blue ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Treatment Time ◽  
Blue Color ◽  
Optimal Conditions ◽  
Research Application ◽  
Research Results ◽  
Color Treatment ◽  
H2o2 Oxidation

Macadamia shell contains a carbon content (47 - 49%), in addition, the shell contains 46.52% Oxidation, Hidro 6.10%, Nitrogen 0.36% and relatively low ash content of only 0.22%, this indicates the grain Macadamia has the potential to become activated carbon thanks to the above characteristics. This study was conducted to modify activated carbon by oxidizing agents to change the surface structure of activated carbon from hydrophobic to hydrophilic, non-polarizing to polarization, increasing the amount of adsorption simultaneously creating more durable links between dyes and activated carbon. Study of Methylene Blue wastewater treatment with coal from Maccadamia shell modified with H2O2 agent at H2O2 ratio : coal = 10:1. Research results show that Methylene Blue adsorption capacity reaches 1g /266,26mg Methylene Blue at optimal conditions corresponding to 25% concentration and 48 hours of soaking time. Analysis of infrared spectra showed that coal is modified by H2O2 agent with functional groups –OH, Carboxylic functional group C=O, group C-H in NH3, C–N group in Amine aliphatic or in Alcohol or Phenol and C–O bonding. Modified coal by H2O2 oxidation agent has Methylene Blue color treatment efficiency of 93.26%, corresponding to the original color of 474.67 Pt - Co at the respective optimal conditions pH = 8.5, dose of 1 g/L and treatment time of 60 minutes. Research results are similar to other research results and are applicable to color wastewater treatment.

Effect of activated carbon surface functional groups on nano-lead electrodeposition and hydrogen evolution and its applications in lead-carbon batteries

2015 ◽  
Vol 186 ◽  
pp. 654-663 ◽  
Author(s):  
Leying Wang ◽  
Hao Zhang ◽  
Gaoping Cao ◽  
Wenfeng Zhang ◽  
Hailei Zhao ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Hydrogen Evolution ◽  
Functional Groups ◽  
Carbon Surface ◽  
Surface Functional Groups

Catalytic Wet Air Oxidation of Phenol over Oxidized Activated Carbon

2013 ◽  
Vol 345 ◽  
pp. 176-179
Author(s):  
Guo Yang ◽  
Xing Yong Liu ◽  
Fu Tao Wang
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Functional Groups ◽  
Removal Rate ◽  
Carbon Surface ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Surface Functional Groups ◽  
Modified Activated Carbon ◽  
Oxidized Activated Carbon

A commercial activated carbon was oxidized with nitric acid to tailor the structure of pore and adjust the distribution of surface functional groups. The textual properties of catalysts was characterized using N2adsorption, and Boehm titration was applied to quantitative analysis of the functional groups on activated carbon surface. The catalytic activity of modified activated carbon was performed by trickle bed at specific temperature and pressure. The oxidized activated carbon displayed lower removal rate for phenol. This phenomenon was reasonably interpreted by small specific surface area and increase in oxygen-containing surface functional groups. The catalytic activity test showed that higher reaction temperature and higher oxygen partial pressure were favorable for phenol conversion.

scholarly journals Effect of carbon surface functional groups on the synthesis of Ru/C catalysts for supercritical water gasification

2015 ◽  
Vol 5 (7) ◽  
pp. 3658-3666 ◽  
Author(s):  
Gaël Peng ◽  
Fabian Gramm ◽  
Christian Ludwig ◽  
Frédéric Vogel
Keyword(s):  
Functional Groups ◽  
Supercritical Water ◽  
Elemental Analysis ◽  
Carbon Support ◽  
Carbon Surface ◽  
Surface Functional Groups ◽  
Boehm Titration ◽  
Supercritical Water Gasification

A carbon support was treated with HNO3 to create surface functional groups (e.g. –COOH, –OH), which were then characterized by TGA, TPD, CNS elemental analysis, and Boehm titration.

Oxidation of activated carbon by hydrogen peroxide. Study of surface functional groups by FT-i.r.

Fuel ◽  
1994 ◽  
Vol 73 (3) ◽  
pp. 387-395 ◽  
Author(s):  
V GOMEZSERRANO ◽  
M ACEDORAMOS ◽  
A LOPEZPEINADO ◽  
C VALENZUELACALAHORRO
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Functional Groups ◽  
Surface Functional Groups

scholarly journals Bio-polishing sludge adsorbents for dye removal

2016 ◽  
Vol 18 (4) ◽  
pp. 15-21 ◽  
Author(s):  
Muhammad Abbas Ahmad Zaini ◽  
Norulaina Alias ◽  
Mohd. Azizi Che Yunus
Keyword(s):  
Methylene Blue ◽  
Specific Surface ◽  
Surface Area ◽  
Functional Groups ◽  
Specific Surface Area ◽  
Treatment Strategies ◽  
Blue Dye ◽  
Surface Functional Groups ◽  
Adsorption Capacities ◽  
Maximum Removal

Abstract The objective of this work is to evaluate the removal of methylene blue dye by bio-polishing sludge-based adsorbents. The adsorbents were characterized according to the specific surface area, pH upon the treatment and surface functional groups. The adsorption of dye was carried out at room temperature, and the adsorption data were analyzed using the isotherm and kinetics models. The bio-polishing sludge is rich in ash content, and the presence of surface functional groups varied with the treatment strategies. The specific surface area of adsorbents is between 7.25 and 20.8 m2/g. Results show that the maximum removal of methylene blue by sludge adsorbents was observed to have the following order: untreated sludge (SR) > zinc chloride-treated (SZ) > microwave-dried (SW) = potassium carbonate-treated (SK) > acid-washed (SH). The maximum adsorption capacities for SR and SZ as predicted by the Langmuir model are 170 and 135 mg/g, respectively. Although SR demonstrates a higher maximum removal than SZ, the latter exhibits greater removal intensity and rate constant even at high dye concentration. The bio-polishing sludge is a promising adsorbent for dye wastewater treatment.

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