Adsorption of lead (Ⅱ) from aqueous solution by modified Auricularia matrix waste: A fixed-bed column study

In this study, Auricularia Matrix Waste (AMW) was modified by sodium hydroxide and immobilized into granular adsorbent with sodium alginate to remove lead ions from aqueous solution through a fixed-bed column. The results of Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX) and Fourier...

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Bibliographic Details
Published in:Ecotoxicology and environmental safety 2019-03, Vol.169, p.722-729
Main Authors: Qu, Juanjuan, Song, Tao, Liang, Jinsong, Bai, Xin, Li, Yue, Wei, Yingnan, Huang, Siqi, Dong, Liying, Jin, Yu
Format: Article
Language:English
Subjects:
Adsorption
Basidiomycota - chemistry
Breakthrough curve
Fixed-bed column
Immobilized and Modified Auricularia Matrix Waste
Lead - analysis
Lead ions
Models, Theoretical
Sodium Hydroxide - chemistry
Solutions
Waste Products - analysis
Water Pollutants, Chemical - analysis
Water Purification - methods
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Summary:In this study, Auricularia Matrix Waste (AMW) was modified by sodium hydroxide and immobilized into granular adsorbent with sodium alginate to remove lead ions from aqueous solution through a fixed-bed column. The results of Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX) and Fourier Transform Infrared Spectroscopy (FTIR) illuminated that immobilization greatly changed the structure, elements, polarity and functional groups of the adsorbent. Amino, hydroxyl, carboxyl groups on the adsorbent actively participated lead(II) adsorption and cation exchange also played an important role in adsorption process. The effects of bed length, flow rate and lead ions concentration determined the breakthrough characteristics and remarkably impacted lead(II) adsorption. The maximum adsorption capacity of lead(II) was 151.7 mg/g, when the influent bed, bed height and initial concentration were 15 mL/min, 25 mL/min and 150 mg/L, respectively. Thomas model was more suitable than the Bohart-Adams model to describe the performance of lead(II) adsorption onto IMAMW. •Auricularia matrix waste (AMW)was modified, immobilized and removed lead ions.•Immobilized modified AMW(IMAMW) showed great lead ions adsorption capacity.•The mechanism of lead ions onto IMAMW was determined by some methods.•The important parameters that influenced the biosorption efficiency were analyzed.•The adsorption process was modeled from Thomas and Bohart-Adams point of view.
ISSN:0147-6513
1090-2414
DOI:10.1016/j.ecoenv.2018.11.085