Carbon Adsorbents from Spent Coffee for Removal of Methylene Blue and Methyl Orange from Water

被引：38

作者：

Block, Inga ^{[1
]}

Guenter, Christina ^{[2
]}

Duarte Rodrigues, Alysson ^{[3
]}

Paasch, Silvia ^{[4
]}

Hesemann, Peter ^{[3
]}

Taubert, Andreas ^{[1
]}

机构：

[1] Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany

[2] Univ Potsdam, Inst Geowissensch, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany

[3] Univ Montpellier, CNRS, ENSCM, ICGM, F-34090 Montpellier, France

[4] Tech Univ Dresden, Bioanalyt Chem, Bergstr 66, D-01062 Dresden, Germany

来源：

MATERIALS | 2021年 / 14卷 / 14期

关键词：

water; spent coffee; dye adsorption; methylene blue; methyl orange; calcium carbonate; activated carbon; water treatment; dye removal; ACTIVATED CARBON; CHEMICAL ACTIVATION; LOW-COST; ADSORPTION CAPACITY; AQUEOUS-SOLUTION; ACID ACTIVATION; SULFURIC-ACID; WASTE; GROUNDS; EQUILIBRIUM;

D O I：

10.3390/ma14143996

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Activated carbons (ACs) were prepared from dried spent coffee (SCD), a biological waste product, to produce adsorbents for methylene blue (MB) and methyl orange (MO) from aqueous solution. Pre-pyrolysis activation of SCD was achieved via treatment of the SCD with aqueous sodium hydroxide solutions at 90 degrees C. Pyrolysis of the pretreated SCD at 500 degrees C for 1 h produced powders with typical characteristics of AC suitable and effective for dye adsorption. As an alternative to the rather harsh base treatment, calcium carbonate powder, a very common and abundant resource, was also studied as an activator. Mixtures of SCD and CaCO3 (1:1 w/w) yielded effective ACs for MO and MB removal upon pyrolysis needing only small amounts of AC to clear the solutions. A selectivity of the adsorption process toward anionic (MO) or cationic (MB) dyes was not observed.

引用

页数：18

共 53 条

[1] Microporous activated carbon prepared from coconut shells using chemical activation with zinc chloride [J].