Preparation of novel nano-adsorbent based on organic-inorganic hybrid and their adsorption for heavy metals and organic pollutants presented in water environment.
The nanocomposites based on organic-inorganic hybrid have been attracting much attention due to their potential applications used as new type of functional materials, such as colloidal stabilizers, electro-optical devices, and nanocomposites materials. The organic-inorganic hybrid of poly(acrylic acid-acrylonitrile)/attapulgite, P(A-N)/AT nanocomposites, were prepared by using in situ polymerization and composition of acrylic acid (AA) and acrylonitrile (AN) onto modified attapulgite (AT) nanoparticles. The resulting P(A-N)/AT nanocomposites were transformed into novel nano-adsorbent of poly(acrylic acid-acryloamidoxime)/attapulgite by further functionalization, i.e. P(A-O)/AT nano-adsorbent. The adsorption properties of P(A-O)/AT toward metal ions were determined, and the results indicated that the adsorbents with nanocomposite structure held a good of selectivity to Pb(2+) among numerous metal ions. The maximum removal capacity of Pb(2+) was up to 109.9 mg/g and it is notable to see that the adsorption removal of P(A-O)/AT nano-adsorbent for Pb(2+) could achieve more than 96.6% when the initial concentration of Pb(2+) was 120.0 mg/l. The kinetics, isotherm models, and conductivity were introduced to study the adsorption mechanism of P(A-O)/AT for Pb(2+) and it was concluded that it could be chemisorptions process and the best coordination form took place when AO:AA:Pb(2+) = 1:1:1. In addition, after simply treated with CTAB, P(A-O)/AT nano-adsorbent showed better adsorption properties for phenol than the same kinds of materials.
College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, PR China.
Xinliang
X
Jin
Cui
C
Yu
Yanfeng
Y
Li
Yongxin
Y
Qi
Liuqing
L
Yang
Guanghui
G
Zhao
Huaiyuan
H
Hu
D000327:Adsorption; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D003188:Composite Resins; D004553:Electric Conductivity; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry / Q000302:isolation & purification; D019216:Metals, Heavy / Q000302:isolation & purification*; D008689:Methacrylates / Q000737:chemistry; D053758:Nanoparticles; D012821:Silanes / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission; D013055:Spectrophotometry, Infrared; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D002593:Cetrimonium Compounds; D003188:Composite Resins; D019216:Metals, Heavy; D008689:Methacrylates; D012821:Silanes; D014874:Water Pollutants, Chemical; C017492:methacryloxypropyltrimethoxysilane; D007854:Lead; D000077286:Cetrimonium