Modified halloysite as an adsorbent for prometryn from aqueous solutions

被引：31

作者：

Grabka, Danuta ^{[1
,2
]}

Raczynska-Zak, Marta ^{[1
,2
]}

Czech, Kamil ^{[1
,2
]}

Slomkiewicz, Piotr Marek ^{[1
,2
]}

Jozwiak, Malgorzata Anna ^{[3
]}

机构：

[1] Jan Kochanowski Univ, Inst Chem, PL-25406 Kielce, Poland

[2] Jan Kochanowski Univ, Struct Res Lab, PL-25406 Kielce, Poland

[3] Jan Kochanowski Univ, Dept Environm Protect & Modelling, PL-25406 Kielce, Poland

来源：

APPLIED CLAY SCIENCE | 2015年 / 114卷

关键词：

Halloysite; Prometryn; Adsorption; Desorption; 2,4-DICHLOROPHENOXY ACETIC-ACID; IN-VITRO RELEASE; ACTIVATED CARBON; SILICA-GEL; SURFACE MODIFICATION; SUSTAINED-RELEASE; WASTE-WATER; REMOVAL; ADSORPTION; HERBICIDES;

D O I：

10.1016/j.clay.2015.06.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Adsorption behavior of prometryn (2,4-bis (isopropylamino)-6-methylthio-s-triazine) on halloysite minerals has been studied in order to consider the application of such adsorbents in water purification. Halloysite, activated in various ways, was characterized by ASAP, SEM/EDS. Batch mode and flow system have been employed, using prometryn aqueous solutions. Various parameters were studied for both systems. Adsorption capacity was determined as a function of adsorbate concentration, of optimum contact time, optimum dose and adsorbent fragmentation. It was found that at pH = 5 the best adsorptive properties for prometryn are obtained for halloysite treated with 96% H2SO4. Such adsorption matches Langmuir and Freundlich models and is in a good agreement with pseudo-second order kinetic model. The desorption of prometryn from halloysite was also studied. The performed studies show that halloysite treated with 96% H2SO4 holds the great potential for removal of water impurities such as prometryn. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：321 / 329

页数：9

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