Preparation, characterization and application of activated carbon from corn cob by KOH activation for removal of Hg(II) from aqueous solution

Liu, Zhiyuan; Sun, Yong; Xu, Xinrui; Meng, Xianghui; Qu, Jingbo; Zhi, Wang; Liu, Changyu; Qu, Bin

doi:10.1016/j.biortech.2020.123154

Cited by 127 publications

(30 citation statements)

References 47 publications

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“…Indeed, the structural properties of activated carbon also depend on the temperature and the duration of activation as well as the impregnation ratio. For example, the activated carbon obtained from a near of corn passes from a macroporous structure for a pyrolysis temperature of 800 • C and duration of 1 h [192] to a microporous structure for a pyrolysis temperature of 850 • C and duration of 3 h [221]. Likewise, the specific surface increases from 1054 to 1618 m 2 /g [192,221].…”

Section: Carbon Precursormentioning

confidence: 99%

“…For example, the activated carbon obtained from a near of corn passes from a macroporous structure for a pyrolysis temperature of 800 • C and duration of 1 h [192] to a microporous structure for a pyrolysis temperature of 850 • C and duration of 3 h [221]. Likewise, the specific surface increases from 1054 to 1618 m 2 /g [192,221]. In this respect, the variation in the parameters of preparation of the activated carbon offers varied in the textural and structural properties.…”

Section: Carbon Precursormentioning

confidence: 99%

“…This is to highlight that mostly metal ions (Pb 2+ , Cd 2+ , Cr 3+ , Fe 2+ , Cu 2+ , Ni 2+ , Co 2+ , Hg 2+ , etc.) removal is favorable in the pH range 2-6 [143,163,188,192,213,219].…”

Section: Timementioning

confidence: 99%

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Current State of Porous Carbon for Wastewater Treatment

et al. 2020

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Porous materials constitute an attractive research field due to their high specific surfaces; high chemical stabilities; abundant pores; special electrical, optical, thermal, and mechanical properties; and their often higher reactivities. These materials are currently generating a great deal of enthusiasm, and they have been used in large and diverse applications, such as those relating to sensors and biosensors, catalysis and biocatalysis, separation and purification techniques, acoustic and electrical insulation, transport gas or charged species, drug delivery, and electrochemistry. Porous carbons are an important class of porous materials that have grown rapidly in recent years. They have the advantages of a tunable pore structure, good physical and chemical stability, a variable specific surface, and the possibility of easy functionalization. This gives them new properties and allows them to improve their performance for a given application. This review paper intends to understand how porous carbons involve the removal of pollutants from water, e.g., heavy metal ions, dyes, and organic or inorganic molecules. First, a general overview description of the different precursors and the manufacturing methods of porous carbons is illustrated. The second part is devoted to reporting some applications such using porous carbon materials as an adsorbent. It appears that the use of porous materials at different scales for these applications is very promising for wastewater treatment industries.

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Section: Carbon Precursormentioning

confidence: 99%

Section: Carbon Precursormentioning

confidence: 99%

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Current State of Porous Carbon for Wastewater Treatment

et al. 2020

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“…16,17 The sizes and uniformity envisage that the glycerol molecule with a size of 0.5-0.6 nm, that can easily t and escape from these pores which facilitates the group transfer and cyclization reactions. FT-IR experiments were conducted on the activated carbon that shows a broad peak at 3439.90 cm À1 for stretching of -OH bond of alcohol 18 (Fig. 6).…”

Section: Features Of the Catalystmentioning

confidence: 99%

Rib shaped carbon catalyst derived from Zea mays L. cob for ketalization of glycerol

et al. 2020

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“…The general process to synthesis carbon is through physical or thermal and chemical activation [10]. There are the applications of activated carbon to remove chemical properties: Hg(II) in aqueous [11], H2S adsorption [12], and also can be used for water treatment [13] and to reduce of biological oxygen demand (BOD) and chemical oxygen demand (COD) [14].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness Of Activated Carbon From Coconut Shell Through Potassium Hydroxide

Mufandi

Jamilatun

Purnama

et al. 2020

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The aim of this work is to synthesis of activated carbon from pyrolysis of coconut shell through 2 N potassium hydroxide (KOH). Carbon can be produced from material through heating at high temperatures with a porous solid containing 85%-95%. During the heating process, the carbon is only carbonized, and without oxidized in the heating chamber to avoid air leakage. Activated carbon can be used as an adsorbent. The absorption capacity of activated carbon is determined by the surface area of the particles. The absorption ability of activated carbon can be improved through an activation with chemicals such as KOH. Carbon will change in physical and chemical properties. This research used the pyrolysis process at an operating temperature of 550 °C. There were three stages of active carbon production by activating KOH, namely 1) immersion of coconut shell through 2 N KOH with a variable time of 5 days, 2) drying process of coconut shell in sunlight, 3) the burning process of dry coconut shell with the temperature of 500°C, and 4) the KOH activation process by reabsorbing activated carbon using KOH and drying in the sun. The results indicated that the water content of activated carbon was affected by drying time. The testing of the activated carbon water content shows that the quality of activated carbon meets Indonesian Standards (SNI, 1995), which is less than 15%. According to Indonesian Industrial Standard (SII) No.0258-79, the ash content of activated carbon is 2.5%, While the result in this study is exceeded 2.5%.

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Preparation, characterization and application of activated carbon from corn cob by KOH activation for removal of Hg(II) from aqueous solution

Cited by 127 publications

References 47 publications

Current State of Porous Carbon for Wastewater Treatment

Current State of Porous Carbon for Wastewater Treatment

Rib shaped carbon catalyst derived from Zea mays L. cob for ketalization of glycerol

Effectiveness Of Activated Carbon From Coconut Shell Through Potassium Hydroxide

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