ZnCl2-activated carbon from soybean dregs as a high efficiency adsorbent for cationic dye removal: isotherm, kinetic, and thermodynamic studies.

Abstract:

:Activated carbon was prepared from soybean dregs using chemical activation by zinc chloride. The influence of activation parameters such as impregnation ratio, activation temperature and carbonization time was investigated. The physicochemical properties of activated carbon were characterized using SEM, FTIR, BET and TGA, respectively. The effect factors including pH, contact time, temperature and dose on the adsorption properties of methylene blue onto activated carbon were studied. The adsorption equilibrium data of methylene blue onto activated carbon were well fitted to the Langmuir model, giving a maximum adsorption capacity of 255.10 mg/g. It indicates that activated carbon is a promising adsorbent for removing methylene blue from aqueous solution. The kinetic data were well described by the pseudo-second-order model. Thermodynamic parameters indicate that adsorption process is spontaneous and endothermic.The effect of temperature on MB adsorbed by AC shows that the equilibrium adsorption capacity increases with increasing temperature from 303 to 323 K. Increasing adsorption capacities with temperature indicate that the adsorption of MB onto AC is controlled by an endothermic reaction.

journal_name

Environ Technol

journal_title

Environmental technology

authors

Li Y,Li Y,Zang H,Chen L,Meng Z,Li H,Ci L,Du Q,Wang D,Wang C,Li H,Xia Y

doi

10.1080/09593330.2018.1554006

subject

Has Abstract

pub_date

2020-06-01 00:00:00

pages

2013-2023

issue

15

eissn

0959-3330

issn

1479-487X

journal_volume

41

pub_type

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