Efficient capture of aqueous humic acid using a functionalized stereoscopic porous activated carbon based on poly(acrylic acid)/food-waste hydrogel

Stereoscopic porous carbons have shown good potential in humic acid (HA) removal. In this work, a novel stereoscopic porous activated carbon (SPAC) was designed and synthesized via the self-assembly of a hydrogel based on food waste during in-situ polymerization, vacuum drying, carbonization, and ac...

Full description

Saved in:
Bibliographic Details
Published in:Journal of environmental sciences (China) 2019-03, Vol.77, p.104-114
Main Authors: Zhou, Tao, Zhao, Xin, Wu, Shuya, Su, Lianghu, Zhao, Youcai
Format: Article
Language:English
Subjects:
3-aminopropyltriethoxysilane
Acrylic Resins - chemistry
Adsorption
Charcoal - chemistry
Food
Food waste
Humic acid
Humic Substances
Hydrogels - chemistry
Hydrogen-Ion Concentration
Porosity
Stereoscopic porous activated carbon
Time Factors
Waste Products
Water - chemistry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Stereoscopic porous carbons have shown good potential in humic acid (HA) removal. In this work, a novel stereoscopic porous activated carbon (SPAC) was designed and synthesized via the self-assembly of a hydrogel based on food waste during in-situ polymerization, vacuum drying, carbonization, and activation. Then, the SPAC was functionalized with 3-aminopropyltriethoxysilane (APTES) and the adsorption behavior of the modified SPAC (SPAC-NH2) was studied systematically. The effects of pH, contact time, initial concentration of HA, and adsorbent dose were investigated, showing that optimal HA removal efficiency (>98.0%) could be achieved at an initial HA concentration of 100 mg/L. The experimental adsorption isotherm data was fitted to the Langmuir model with a maximum adsorption capacity of 156.0 mg HA/g SPAC-NH2. Analysis of the mechanism indicated that the removal of HA was mainly realized through the amidization reaction between the COOH groups of HA and the NH2 groups of APTES. All of the above results showed that SPAC-NH2 powder is an efficient, eco-friendly, and reusable adsorbent which is suitable for the removal of HA from wastewater. [Display omitted]
ISSN:1001-0742
1878-7320
DOI:10.1016/j.jes.2018.06.019