scholarly journals Identification of Surface Functional Group on Activated Carbon from Waste Sago

2021 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Octolia Togibasa ◽  
Yane Oktovina Ansanay ◽  
Khaeriah Dahlan ◽  
Maya Erari
Keyword(s):  
Activated Carbon ◽  
Phosphoric Acid ◽  
Functional Groups ◽  
Potassium Hydroxide ◽  
Functional Group ◽  
Adsorption Properties ◽  
Surface Functional Group

Activated carbon is a powerful adsorption material which mainly used as pollutants adsorption. The adsorption properties own derived from the main functional groups or chemical atoms derived from the activation processes. In this study, the activated carbon was prepared from waste sago and activated using two different chemicals activation agents called phosphoric acid and potassium hydroxide. The aim of this study was to identify the surface functional group on waste sago activated carbon produced. The results showed that activated carbon with phosphoric acid activator contained OH, C=C, CO and CH functional groups, while activated carbon with potassium hydroxide activator contained O-H, C≡C, C=C, C-O and C-H functional groups. These results lead to support the recommendations for the development of the application of waste sago activated carbon made as adsorbents in the purification of lead (II) and cadmium (II) wastewater.

Effect of Activation Agents on COD Reduction Using Activated Carbon from Agricultural Residue

2020 ◽  
Vol 1010 ◽  
pp. 453-458
Author(s):  
Mohd Zazmiezi Mohd Alias ◽  
Rozidaini Mohd Ghazi ◽  
Nik Raihan Nik Yusoff ◽  
Mohd Hafiz Jamaludin
Keyword(s):  
Activated Carbon ◽  
Phosphoric Acid ◽  
Potassium Hydroxide ◽  
Activated Carbons ◽  
Oxygen Demand ◽  
Koh Activation ◽  
Ftir Analysis ◽  
Agricultural Residue ◽  
Cod Reduction ◽  
Activating Agent

This study investigated the effect of activating agent on activated carbon preparation and potential chemical oxygen demand (COD) reduction using activated carbons (AC) prepared. Zinc chloride, phosphoric acid and potassium hydroxide were utilized in impregnation of bamboo and rice husk. Result of SEM-EDX, FTIR as well as COD reduction were compared and discussed. The SEM displayed highest porosity in AC using KOH activation. FTIR analysis displayed obvious difference for each activation. AC using KOH activation obtained highest COD reduction.

Surface functional group modification induced partial Fermi level pinning and ohmic contact at borophene–MoS2 interfaces

2020 ◽  
Vol 22 (34) ◽  
pp. 19202-19212
Author(s):  
Dongqing Zou ◽  
Wenkai Zhao ◽  
Wanfeng Xie ◽  
Yuqing Xu ◽  
Xiaoteng Li ◽  
...  
Keyword(s):  
Fermi Level ◽  
Functional Groups ◽  
Ohmic Contact ◽  
Functional Group ◽  
Surface Functional Group ◽  
Surface Functional Groups ◽  
Fermi Level Pinning ◽  
Group Modification ◽  
Functional Group Modification

Surface functional groups modification is a feasible approach to achieve SBH tuning for borophene–MoS2 interfaces.

Physicochemical Properties of Carbons Prepared from Physic Nut Waste by Phosphoric Acid and Potassium Hydroxide Activations

2007 ◽  
Vol 561-565 ◽  
pp. 1719-1722 ◽  
Author(s):  
Chiravoot Pechyen ◽  
Duangdao Aht-Ong ◽  
Duangduen Atong ◽  
Viboon Sricharoenchaikul
Keyword(s):  
Activated Carbon ◽  
Phosphoric Acid ◽  
Physicochemical Properties ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Potassium Hydroxide ◽  
Bet Surface Area ◽  
Physic Nut ◽  
Monolayer Adsorption ◽  
Adsorption Data

Char derived from pyrolysis of physic nut waste at 400-800°C was used for the preparation of activated carbon by chemical impregnation of phosphoric acid and potassium hydroxide. The original char exhibited the BET surface area in the range of 120-250 m2·g-1. The surface area increased to 480 and 532 m2·g-1 when activated with H3PO4 and KOH, respectively. Equilibrium adsorption data was found to be best represented by the Langmuir isotherm with maximum monolayer adsorption capacity of 560.13 mg·g-1 at 30°C. The adsorption capacity of the physic nut residue activated carbon was comparable to commercial activated carbon.

Activated carbon from potassium hydroxide spent liquor lignin using phosphoric acid

TAPPI Journal ◽  
2018 ◽  
Vol 17 (02) ◽  
pp. 63-69 ◽  
Author(s):  
Mamon Sarkar ◽  
Chao Tian ◽  
M. Sarwar Jahan
Keyword(s):  
Activated Carbon ◽  
Phosphoric Acid ◽  
Iodine Number ◽  
Surface Area ◽  
Potassium Hydroxide ◽  
Bet Surface Area ◽  
Koh Activation ◽  
Activation Temperature ◽  
Impregnation Ratio ◽  
Spent Liquor

Activated carbon was prepared by phosphoric acid (H3PO4) activation of potassium hydroxide (KOH) pulping spent liquor lignin from rice straw and compared with KOH hydroxide activation. The process parameters, such as impregnation ratio, activation temperature, and activation time were varied and their effects on the yield of activated carbon and iodine number were studied. The activated carbon prepared by H3PO4 at 800°C for 60 min at an impregnation ratio of 2.5 reached a Brunauer-Emmett-Teller (BET) surface area of 1063 m2/g, including pore diameter of 14.4 nm, iodine number of 525 mg/g, and yield of 49.2%. Yield and BET surface area in KOH activation was much lower than that of H3PO4.

Modification of Ultra-microporous Dominated Carbon by O/N-containing Functional Groups Grafted for Enhanced Supercapacitor Performances

2021 ◽  
Author(s):  
Yan-Dong Ma ◽  
Jian-Fei Gao ◽  
Zheng-Hua He ◽  
Ling-Bin Kong
Keyword(s):  
Pore Size ◽  
Functional Groups ◽  
Functional Group ◽  
Carbon Materials ◽  
Surface Functional Group ◽  
Simple Method

In our work, a simple method was employed to prepare ultra-micropores dominated carbon materials with controllable pore size. And a mass of heteroatoms was introduced by surface functional group grafting,...

scholarly journals Chemisorption Characteristics of 2,4-Dichlorophenol in Aqueous Solution onto Different Adsorbents

2005 ◽  
Vol 23 (3) ◽  
pp. 225-233 ◽  
Author(s):  
Fei Zhenghao ◽  
Xia Mingfang ◽  
Wu Lin ◽  
Chen Jinlong ◽  
Gu Yunlan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Functional Groups ◽  
Physical Adsorption ◽  
Equilibrium Concentration ◽  
Langmuir Equation ◽  
Adsorption Properties ◽  
Adsorption Capacities ◽  
Different Temperatures ◽  
Simultaneous Process

The adsorption properties towards 2,4-dichlorophenol of several adsorption resins, viz. ZH-01, ZH-02 and ZH-03 respectively modified with different functional groups, and of granular activated carbon (GAC) have been compared experimentally with those of Amberlite XAD-4. This paper focuses on the static equilibrium adsorption behaviours and the confirmation of chemisorption characteristics. An equation relating the amount chemisorbed and the assumed chemisorption equilibrium concentration of adsorbate in the aqueous solution was established. This shows that the data may be fitted perfectly by the Langmuir equation. The adsorption capacities measured at different temperatures and the static desorption efficiency reveal that the adsorption of 2,4-dichlorophenol from water onto ZH-01, ZH-02, ZH-03 or GAC occurs via a simultaneous process involving physical adsorption and chemical reaction.

scholarly journals PEMBUATAN DAN KARAKTERISASI ARANG AKTIF DARI BATANG LIMBAH TANAMAN GUMITIR DENGAN AKTIVATOR ZnCl2

Jurnal Kimia ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 95
Author(s):  
E. Sahara ◽  
D. E. Permatasaari ◽  
I W. Suarsa
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Phosphoric Acid ◽  
Functional Group ◽  
Agricultural Waste ◽  
Group Analysis ◽  
Absorption Capacity ◽  
National Standard ◽  
Volatile Content ◽  
Functional Group Analysis

The agricultural waste of gumitir plants stem can be used as an ingredient in producing an activated carbon. Some researchers have reported that the additions of phosphoric acid and NaOH as chemical activators have resulted in an activated carbon that met the SNI (Indonesian National Standard) 06-3730-1995 about technical activated carbon. The purpose of this study was to produce and characterize the activated carbon from the stem of gumitir plants carbonized at 300oC for 90 minutes with the use of ZnCl2 as the activator. The activation was carried out by adding ZnCl2 to an amount of carbon in various mole ratios. The characteristics of the activated carbon obtained were compared to the SNI. It was evident that the addition of 0.1 mole of ZnCl2 to 1 gram of the carbon produced an activated carbon that met the SNI standard, namely, water content of 5.00%, as content of 8.33%, volatile content of 950oC of heating  of  7.36%, carbon content of 79,30%, iodine absorption capacity of 788.1271 mg/g, and methylene blue absorption capacity of 260.7917 mg/g. The surface area and surfae acidity of this carbon was of 677,6270 mg2/g and 0.3396 mmol/g, respectively. The functional group analysis of this activated carbon showed the presence of O-H, COOH, C-O aldehyde, alkaline C-C and C-H groups.

scholarly journals Removal of Pb(II), Fe(II) and Zn(II) using activated carbon produced from foxtail palm fruit chemically activated by KOH and H3PO4.

2019 ◽  
Vol 7 (1) ◽  
pp. 19-22
Author(s):  
Nur Sabiha Sairan ◽  
Noor Syuhadah Subki ◽  
Nik Raihan Nik Yusoff
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Phosphoric Acid ◽  
Potassium Hydroxide ◽  
Adsorption Process ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Sorption Process ◽  
Palm Fruit ◽  
Main Factor

The increasing rate of urbanization and continuous developments are the main factor which led to heavy metals contamination into the environment especially in the water bodies. However, the contamination of heavy metal can be treated using adsorption process using activated carbon. Thus, this study was based on using powdered activated carbon, which prepared from foxtail palm fruit and chemically activated using potassium hydroxide and phosphoric acid. The main parameters such as effect of chemical activating agent, effect of initial concentration of heavy metal and effect of sorbent dosage that influenced the sorption process were studied. From the result, activated carbon that was chemically activated by phosphoric acid shown the best removal compared to activated carbon that was chemically activated by potassium hydroxide. The percentage removal of Pb(II), Fe(II) and Zn(II) were 95.8%, 99.9% and 22.8% respectively using 0.5 g of activate carbon. The result indicates that the adsorption process using activated carbon that produced from plant can be applied for heavy metal removal from aqueous solution.

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