CHARACTERIZATION OF UNYE BENTONITE AFTER TREATMENT WITH SULFURIC ACID

被引：25

作者：

Caglar, Bulent ^{[1
]}

Afsin, Beytullah ^{[2
]}

Koksal, Engin ^{[2
]}

Tabak, Ahmet ^{[3
]}

Eren, Erdal ^{[4
]}

机构：

[1] Erzincan Univ, Fac Sci & Arts, Dept Chem, TR-24100 Erzincan, Turkey

[2] Ondokuz Mayis Univ, Fac Sci & Arts, Dept Chem, TR-55139 Samsun, Turkey

[3] Rize Univ, Fac Sci & Arts, Dept Chem, TR-53100 Rize, Turkey

[4] Bilecik Univ, Fac Sci & Arts, Dept Chem, TR-11210 Bilecik, Turkey

来源：

QUIMICA NOVA | 2013年 / 36卷 / 07期

关键词：

acid activation; Unye bentonite; mesoporous; X-RAY-DIFFRACTION; ACTIVATED MONTMORILLONITE; TURKISH BENTONITE; BET MEASUREMENT; CLAY-MINERALS; SMECTITE; ADSORPTION; PRODUCTS; DTA/TG;

D O I：

10.1590/S0100-40422013000700006

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Unye bentonite was found to consist predominantly of a dioctahedral smectite along with quartz, tridymite, cristobalite, and minor fractions of feldspar and anatase. A considerable amount of Al was retained as a constituent in acid-resistant impurities following the decomposition of the montmorillonite via acid treatment at an acid/clay ratio of 0.4. These impurities were mesoporous with a maximum surface area of 303.9 +/- 0.4 m(2) g(-1). A sharp decrease in the d(001) lattice spacing of the montmorillonite to 15.33 angstrom reflected the reduction of the crystallinity in the activated products. In addition, the increase in the ease with which newly formed hydroxyl groups were lost paralleled the severity of the acid treatment.

引用

页码：955 / 959

页数：5

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