Loess clay based copolymer for removing Pb(II) ions.
Functional monomers, such as acrylic acid and 2-hydroxyethyl methacrylate were supported into loess clay in situ polymerization, which afforded loess clay based copolymer (LC/PAAHM), a new kind of polymer adsorbent for removing Pb(II) ions from aqueous solution. Characterization of the polymer adsorbent was carried out by different sophisticated methods, such as Fourier transformation infrared spectrometry (FTIR), scanning electron microscopy (SEM), X-ray diffractometry (XRD), thermogravimetric analysis (TGA), and Zetasizer. Batch experiments were carried out to evaluate the factors affecting the removal efficiency, in which the pH, the adsorbent dosage, temperature and initial Pb(II) concentration all found in positive relevance to the increase of Pb(II) removal efficiency. The removal rate of Pb(II) got to 99% at room temperature and the adsorption capacity got to 356.9 mg/g. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data, and Langmuir and Freundlich models have been applied to study the adsorption equilibrium, respectively.
Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Institute of Polymer, Northwest Normal University, Lanzhou 730070, China.
Yu-Feng
YF
He
Ling
L
Zhang
Rong-Min
RM
Wang
Hui-Ru
HR
Li
Yan
Y
Wang
D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D007854:Lead / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D000180:Acrylic Resins; D000538:Aluminum Silicates; D008689:Methacrylates; D011108:Polymers; D014874:Water Pollutants, Chemical; D007854:Lead; C006903:carbopol 940; C005044:hydroxyethyl methacrylate; D000077215:Clay