Adsorption of methyl orange and methylene blue on activated biocarbon derived from birchwood pellets

被引：11

作者：

Lee, Heejin ^{[1
]}

Fiore, Silvia ^{[1
,2
]}

Berruti, Franco ^{[1
]}

机构：

[1] Western Univ, Inst Chem & Fuels Alternat Resources, Fac Engn, 22312 Wonderland Rd N, Ilderton, ON N0M 2A0, Canada

[2] Politecn Torino, DIATI Dept Engn Environm Land & Infrastruct, Corso Duca Abruzzi 24, I-10129 Turin, Italy

来源：

BIOMASS & BIOENERGY | 2024年 / 191卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Adsorption; Biochar; Biocarbon; Isotherm; Kinetics; Dye; Methylene blue; Methyl orange; CO-PYROLYSIS; BIOCHAR; WASTE;

D O I：

10.1016/j.biombioe.2024.107446

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study explored the adsorption capacity of a physically activated biocarbon derived from the pyrolysis of birchwood pellets (ABPB) towards two dyes - methyl orange (MO, anionic) and methylene blue (MB, cationic), at pH 2, 7 and 11. Compared to mineral commercial activated carbon (CACmineral), ABPB exhibited lower SSA, pores volume and surface; higher external surface and average pore diameter, similar ash content and aromaticity, and stronger hydrophilicity and polarity. The maximum adsorption capacity on ABPB was equal to 220 mg/g for MO and 91 mg/g for MB after 17 h. Batch tests with variable adsorbent amount (0.5-2.5 g/L) showed for both ABPB and CACmineral better results for lower adsorbent dose. Under all tested conditions, ABPB showed higher or analogous adsorption capacity compared to CACmineral. Based on the pKa of MB (3.80) and MO (3.46) and on the pHPZC of ABPB (5.3), the adsorption was favored at pH 2 for MO and at pH 11 for MB. Kinetics analysis and isotherm modelling revealed that, although many different physicochemical interactions occurred between ABPB and the dyes molecules, chemisorption is the rate-controlling step and prevalent mechanism. In conclusion, this study may provide support to further research aimed at exploring the effect of ABPB's physicochemical properties on the efficiency and mechanisms of dyes adsorption.

引用

页数：12

共 55 条

[31] The influence of the Miscanthus giganteus pyrolysis temperature on the application of obtained biochars as solid biofuels and precursors of high surface area activated carbons [J].

Mokrzycki, Jakub ;

Magdziarz, Aneta ;

Rutkowski, Piotr .

BIOMASS & BIOENERGY, 2022, 164

[32] Linear and Non-linear Modelling of Kinetics and Equilibrium Data for Cr(VI) Adsorption by Activated Carbon Prepared from Piliostigma reticulatum [J].

Mouhamadou, Sali ;

Dalhatou, Sadou ;

Dobe, Narcisse ;

Djakba, Raphael ;

Fasanya, Opeoluwa O. ;

Bansod, Naresh D. ;

Fita, Germaine ;

Ngayam, Casimir H. ;

Tejeogue, Jean P. N. ;

Harouna, Massai .

CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY, 2023, 6 (02) :719-731

[33]

Nath H., 2021, Bioresource Technology Reports, V14, P100689, DOI [10.1016/j.biteb.2021.100689, DOI 10.1016/J.BITEB.2021.100689, https://doi.org/10.1016/j.biteb.2021.100689]

[34] Chitosan-Modified Biochar and Unmodified Biochar for Methyl Orange: Adsorption Characteristics and Mechanism Exploration [J].