An innovative zinc oxide-coated zeolite adsorbent for removal of humic acid

被引：66
|
作者：
Wang, Lingling [1 ,2 ]
Han, Changseok [3 ]
Nadagouda, Mallikarjuna N. [4 ]
Dionysiou, Dionysios D. [2 ,5 ]
机构：
[1] Quanzhou Normal Univ, Coll Chem Engn & Mat, Quanzhou 362000, Fujian, Peoples R China
[2] Univ Cincinnati, Engn Res Ctr 705, Environm Engn & Sci Program, Cincinnati, OH 45221 USA
[3] US EPA, ORD, NRMRL, STD,CPB, 26 W Martin Luther King Jr Dr, Cincinnati, OH 45268 USA
[4] US EPA, ORD, NRMRL, WSWRD,WQMB, 26 W Martin Luther King Jr Dr, Cincinnati, OH 45268 USA
[5] Univ Cyprus, Sch Engn, Nireas Int Water Res Ctr, POB 20537, CY-1678 Nicosia, Cyprus
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2016年 / 313卷
关键词：
Electrostatic interaction; Humic acid; Water treatment; Zeolite; Zinc oxide; Natural organic matter; NATURAL ORGANIC-MATTER; AQUEOUS-SOLUTION; ACTIVATED CARBON; ADSORPTION; WATER; IONS; CHARGE; MONTMORILLONITE; ULTRAFILTRATION; EQUILIBRIUM;
D O I：
10.1016/j.jhazmat.2016.03.070
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Zinc oxide (ZnO)-coated zeolite adsorbents were developed by both nitric acid modification and Zn(NO3)(2)center dot 6H(2)O functionalization of zeolite 4A. The developed adsorbents were used for the removal of humic acid (HA) from aqueous solutions. The synthesized materials were characterized by porosimetry analysis, scanning electron microscopy, X-Ray diffraction analysis, and high resolution transmission electron microscopy. The maximum adsorption capacity of the adsorbents at 21 +/- 1 degrees C was about 60 mgCg(-1). The results showed that the positive charge density of ZnO-coated zeolite adsorbents was proportional to the amount of ZnO coated on zeolite and thus, ZnO-coated zeolite adsorbents exhibited a greater affinity for negatively charged ions. Furthermore, the adsorption capacity of ZnO-coated zeolite adsorbents increased markedly after acid modification. Adsorption experiments demonstrated ZnO-coated zeolite adsorbents possessed high adsorption capacity to remove HA from aqueous solutions mainly due
引用
收藏
页码：283 / 290
页数：8
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