Open AccessPerformance and characteristics of methylene blue adsorption using nanomagnetite graphite adsorbent
Author(s) -
Shuangxi Wen,
Juanjuan Zhang,
Dele Meng,
Hongying Yang,
Tongneng Yang,
Mi Xiao
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/615/1/012071
Subject(s) - methylene blue , adsorption , aqueous solution , langmuir adsorption model , point of zero charge , calcination , graphite , nuclear chemistry , materials science , chemistry , chemical engineering , organic chemistry , photocatalysis , composite material , catalysis , engineering
In this paper, a nanomagnetite graphite adsorbent (MGNP) was developed for removal of methylene blue from aqueous solutions. MGNP was synthesized through the nanographite powder (GNP) functionalized with magnetic γ-Fe 2 O 3 nanoparticles under alkaline conditions and calcining for 3 h at 300 °C. The MGNP featured a quick separation process from solutions with an external magnet. The surface charge of the adsorbent was pH-dependent, the pH pzc of MGNP was approximately 7.2. The methylene blue adsorption isotherm of the MGNP can be well fitted by the Langmuir model, the maximum adsorption capacity was about 114.94 mg/g at 25 °C when pH = 7 ± 0.1. In conclusion, the MGNP could be a potential adsorbent for the uptake of methylene blue from wastewater.