Adsorption of naphthalene from aqueous solution on activated carbons obtained from bean pods

被引：98

作者：

Cabal, Belen ^{[2
]}

Budinova, Temenuzhka ^{[1
]}

Ania, Conchi O. ^{[2
]}

Tsyntsarski, Boyko ^{[1
]}

Parra, Jose B. ^{[2
]}

Petrova, Bilyana ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Inst Organ Chem, BU-1113 Sofia, Bulgaria

[2] CSIC, Inst Nacl Carbon, E-33080 Oviedo, Spain

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 161卷 / 2-3期

关键词：

Adsorption; Naphthalene; Bean pods; K2CO3; activation; Water vapor activation; PHARMACEUTICALS; ADSORBENTS; REMOVAL; BIOMASS; STEAM;

D O I：

10.1016/j.jhazmat.2008.04.108

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The preparation of activated carbons from bean pods waste by chemical (K2CO3) and physical (water vapor) activation was investigated. The carbon prepared by chemical activation presented a more developed porous structure (surface area 1580 m(2) g(-1) and pore volume 0.809 cm(3) g(-1)) than the one obtained by water vapor activation (258 m(2) g(-1) and 0.206 cm(3) g(-1)). These carbons were explored as adsorbents for the adsorption of naphthalene from water solutions at low concentration and room temperature and their properties are compared with those of commercial activated carbons. Naphthalene adsorption on the carbons obtained from agricultural waste was stronger than that of carbon adsorbents reported in the literature. This seems to be due to the presence of large amounts of basic groups on the bean-pod-based carbons. The adsorption capacity evaluated from Freundlich equation was found to depend on both the textural and chemical properties of the carbons. Naphthalene uptake on biomass-derived carbons was 300 and 85 mg g(-1) for the carbon prepared by chemical and physical activation, respectively. Moreover, when the uptake is normalized per unit area of adsorbent, the least porous carbon displays enhanced naphthalene removal. The results suggest an important role of the carbon composition including mineral matter in naphthalene retention. This issue remains under investigation. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1150 / 1156

页数：7

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