Novel synthesis of a versatile magnetic adsorbent derived from corncob for dye removal.
Corncob, an agricultural waste, was successfully converted into a novel magnetic adsorbent by a low-temperature hydrothermal method (453K), including carbonization under saline conditions and magnetization using iron (III) salt. The resultant magnetic carbonaceous adsorbent (MCA) exhibited a porous structure with a higher specific surface area and more oxygen-containing functional groups than its carbonaceous precursor (CP), which can be attributed to the catalytic effect of Fe (III). The adsorption behaviors of both MCA and CP could be described well by Langmuir isotherm and pseudo-second-order model. The adsorption capacity for Methylene blue (MB) revealed by adsorption isotherms were 163.93mg/g on MCA and 103.09mg/g on CP, respectively. Moreover, MCA was demonstrated as a versatile adsorbent for removal of both anionic and cationic dyes, and it showed good reusability in regeneration studies. This work provides an alternative approach for effective conversion of biomass waste and application of them in pollutant removal.
School of Life Sciences, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, PR China.
Huan
H
Ma
School of Life Sciences, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, PR China.
Jia-Bao
JB
Li
School of Engineering, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, PR China.
Wei-Wei
WW
Liu
School of Life Sciences, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, PR China.
Miao
M
Miao
School of Life Sciences, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, PR China.
Bei-Jiu
BJ
Cheng
School of Life Sciences, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, PR China. Electronic address: zhusuwen2012@126.com.
Su-Wen
SW
Zhu
D000327:Adsorption; D001673:Biodegradation, Environmental; D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008751:Methylene Blue / Q000737:chemistry / Q000302:isolation & purification*; D035261:Plant Components, Aerial / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry*; D014462:Ultrafiltration / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods; D003313:Zea mays / Q000737:chemistry*
D004396:Coloring Agents; D058185:Magnetite Nanoparticles; D010936:Plant Extracts; D014874:Water Pollutants, Chemical; D008751:Methylene Blue
Adsorption; Corncob waste; Hydrothermal preparation; Magnetic adsorbent; Saline condition