Adsorption and preliminary safety evaluation of activated carbons refined from charcoals

Han Chien Lin, Yu Ching Weng, Gwo Shyong Hwang, Noboru Fujimoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The objectives of this study were to investigate the absorption and preliminary safety of activated carbon (AC) refined from Makino bamboo, Moso bamboo and Japanese cedar charcoals with carbon dioxide (CO2) at an 800 and 900°C activation temperature with 90,120 and 150 min of activation time. The yield of AC was from 47.5 to 90.4%. The benzene absorption (10.8-37.4%) of AC was also higher than that (1.3-9.4%) of charcoals. The iodine value (562-1088 mg/g) of AC was higher than that (141-628 mg/g) of charcoals. The true density (2.11-2.17g/cm3) and BET surface area (791.22-829.78 m2/g) of AC were obviously higher than those (1.68-1.86 g/cm 3 and 58.95-356.62 m2/g) of charcoals. The AC belongs to a mesopore structure because the results of average pore diameters were from 2.22 to 2.69 nm. No matter what the relative humidity (RH) was in high/low RH at either 90 or 40% with a constant temperature of 25°C, the hygroscopic ability of AC was better than that for charcoals, and the water activity of AC was from 0.45 to 0.46. The heavy metal content as the Pb (Plumbum) ppm base of AC was below 40 ppm and met the Sanitation Standard of Edible Natural Colorants from the announcement by the Department of Health's Executive Yuan, in Taiwan. The preliminary safety evaluation using the Ames test for the charcoals and AC had no cytotoxicity and mutagenicity toward Salmonella typhimurium TA98 and TA100. It is suggested that the AC, refined from the charcoals, can be expected to be a natural moisture-proof material.

Original languageEnglish
Pages (from-to)117-125
Number of pages9
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume59
Issue number1
Publication statusPublished - Feb 1 2014

Fingerprint

Charcoal
activated carbon
charcoal
Adsorption
adsorption
Carbon
Safety
Humidity
relative humidity
carbon dioxide
Cryptomeria
Phyllostachys edulis
Ames test
Temperature
Sanitation
Cryptomeria japonica
iodine value
mutagenicity
sanitation
benzene

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

Cite this

Adsorption and preliminary safety evaluation of activated carbons refined from charcoals. / Lin, Han Chien; Weng, Yu Ching; Hwang, Gwo Shyong; Fujimoto, Noboru.

In: Journal of the Faculty of Agriculture, Kyushu University, Vol. 59, No. 1, 01.02.2014, p. 117-125.

Research output: Contribution to journalArticle

@article{acdaed5d6ad74fbd8dc5e75fc92a0835,
title = "Adsorption and preliminary safety evaluation of activated carbons refined from charcoals",
abstract = "The objectives of this study were to investigate the absorption and preliminary safety of activated carbon (AC) refined from Makino bamboo, Moso bamboo and Japanese cedar charcoals with carbon dioxide (CO2) at an 800 and 900°C activation temperature with 90,120 and 150 min of activation time. The yield of AC was from 47.5 to 90.4{\%}. The benzene absorption (10.8-37.4{\%}) of AC was also higher than that (1.3-9.4{\%}) of charcoals. The iodine value (562-1088 mg/g) of AC was higher than that (141-628 mg/g) of charcoals. The true density (2.11-2.17g/cm3) and BET surface area (791.22-829.78 m2/g) of AC were obviously higher than those (1.68-1.86 g/cm 3 and 58.95-356.62 m2/g) of charcoals. The AC belongs to a mesopore structure because the results of average pore diameters were from 2.22 to 2.69 nm. No matter what the relative humidity (RH) was in high/low RH at either 90 or 40{\%} with a constant temperature of 25°C, the hygroscopic ability of AC was better than that for charcoals, and the water activity of AC was from 0.45 to 0.46. The heavy metal content as the Pb (Plumbum) ppm base of AC was below 40 ppm and met the Sanitation Standard of Edible Natural Colorants from the announcement by the Department of Health's Executive Yuan, in Taiwan. The preliminary safety evaluation using the Ames test for the charcoals and AC had no cytotoxicity and mutagenicity toward Salmonella typhimurium TA98 and TA100. It is suggested that the AC, refined from the charcoals, can be expected to be a natural moisture-proof material.",
author = "Lin, {Han Chien} and Weng, {Yu Ching} and Hwang, {Gwo Shyong} and Noboru Fujimoto",
year = "2014",
month = "2",
day = "1",
language = "English",
volume = "59",
pages = "117--125",
journal = "Journal of the Faculty of Agriculture, Kyushu University",
issn = "0023-6152",
publisher = "Faculty of Agriculture, Kyushu University",
number = "1",

}

TY - JOUR

T1 - Adsorption and preliminary safety evaluation of activated carbons refined from charcoals

AU - Lin, Han Chien

AU - Weng, Yu Ching

AU - Hwang, Gwo Shyong

AU - Fujimoto, Noboru

PY - 2014/2/1

Y1 - 2014/2/1

N2 - The objectives of this study were to investigate the absorption and preliminary safety of activated carbon (AC) refined from Makino bamboo, Moso bamboo and Japanese cedar charcoals with carbon dioxide (CO2) at an 800 and 900°C activation temperature with 90,120 and 150 min of activation time. The yield of AC was from 47.5 to 90.4%. The benzene absorption (10.8-37.4%) of AC was also higher than that (1.3-9.4%) of charcoals. The iodine value (562-1088 mg/g) of AC was higher than that (141-628 mg/g) of charcoals. The true density (2.11-2.17g/cm3) and BET surface area (791.22-829.78 m2/g) of AC were obviously higher than those (1.68-1.86 g/cm 3 and 58.95-356.62 m2/g) of charcoals. The AC belongs to a mesopore structure because the results of average pore diameters were from 2.22 to 2.69 nm. No matter what the relative humidity (RH) was in high/low RH at either 90 or 40% with a constant temperature of 25°C, the hygroscopic ability of AC was better than that for charcoals, and the water activity of AC was from 0.45 to 0.46. The heavy metal content as the Pb (Plumbum) ppm base of AC was below 40 ppm and met the Sanitation Standard of Edible Natural Colorants from the announcement by the Department of Health's Executive Yuan, in Taiwan. The preliminary safety evaluation using the Ames test for the charcoals and AC had no cytotoxicity and mutagenicity toward Salmonella typhimurium TA98 and TA100. It is suggested that the AC, refined from the charcoals, can be expected to be a natural moisture-proof material.

AB - The objectives of this study were to investigate the absorption and preliminary safety of activated carbon (AC) refined from Makino bamboo, Moso bamboo and Japanese cedar charcoals with carbon dioxide (CO2) at an 800 and 900°C activation temperature with 90,120 and 150 min of activation time. The yield of AC was from 47.5 to 90.4%. The benzene absorption (10.8-37.4%) of AC was also higher than that (1.3-9.4%) of charcoals. The iodine value (562-1088 mg/g) of AC was higher than that (141-628 mg/g) of charcoals. The true density (2.11-2.17g/cm3) and BET surface area (791.22-829.78 m2/g) of AC were obviously higher than those (1.68-1.86 g/cm 3 and 58.95-356.62 m2/g) of charcoals. The AC belongs to a mesopore structure because the results of average pore diameters were from 2.22 to 2.69 nm. No matter what the relative humidity (RH) was in high/low RH at either 90 or 40% with a constant temperature of 25°C, the hygroscopic ability of AC was better than that for charcoals, and the water activity of AC was from 0.45 to 0.46. The heavy metal content as the Pb (Plumbum) ppm base of AC was below 40 ppm and met the Sanitation Standard of Edible Natural Colorants from the announcement by the Department of Health's Executive Yuan, in Taiwan. The preliminary safety evaluation using the Ames test for the charcoals and AC had no cytotoxicity and mutagenicity toward Salmonella typhimurium TA98 and TA100. It is suggested that the AC, refined from the charcoals, can be expected to be a natural moisture-proof material.

UR - http://www.scopus.com/inward/record.url?scp=84897898101&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897898101&partnerID=8YFLogxK

M3 - Article

VL - 59

SP - 117

EP - 125

JO - Journal of the Faculty of Agriculture, Kyushu University

JF - Journal of the Faculty of Agriculture, Kyushu University

SN - 0023-6152

IS - 1

ER -