Simazine removal from waters by adsorption on porous silicas tailored by sol-gel technique

被引：23

作者：

Sannino, Filomena ^{[1
]}

Ruocco, Silvia ^{[1
]}

Marocco, Antonello ^{[2
]}

Esposito, Serena ^{[2
]}

Pansini, Michele ^{[2
]}

机构：

[1] Univ Naples Federico II, Dipartimento Agr, I-80055 Portici, NA, Italy

[2] Univ Cassino & Lazio Merid, Dipartimento Ingn Civile & Meccan, I-03043 Cassino, Fr, Italy

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2013年 / 180卷

关键词：

Simazine removal; Porous silicas; Sol-gel technique; Adsorption; Iterative process; HERBICIDE SIMAZINE; AQUEOUS-SOLUTIONS; PESTICIDE; ZEOLITES; SORPTION; ATRAZINE; LINDANE;

D O I：

10.1016/j.micromeso.2013.06.026

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two porous silica samples were synthesized through the sol-gel technique and characterized in terms of surface area and pore size distribution. The ability of such samples in removing simazine from polluted waters by adsorption was evaluated by investigating the main process parameters (pH, time, initial simazine concentration and solid/liquid ratio). An iterative process of simazine removal from waters by adsorption on the more suitable of the two silica samples is proposed, featuring: (i) final simazine concentration well below 0.05 mg/dm(3), the maximum concentration allowed by Italian laws in wastewaters; (ii) regeneration of the adsorbent by a few minutes thermal treatment at 500 degrees C, which results in the removal of simazine without markedly damaging the adsorbent; (iii) thorough oxidation of simazine by combustion. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：178 / 186

页数：9

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