QUANTITATIVE MONITORING OF SIDE PRODUCTS DURING HIGH LOADING OF ZEOLITES BY HEAVY-METALS VIA PH MEASUREMENTS

被引：41

作者：

WARK, M

LUTZ, W

SCHULZEKLOFF, G

DYER, A

机构：

[1] CTR HETEROGENEOUS CATALYSIS,BERLIN,GERMANY

[2] UNIV SALFORD,DEPT CHEM & APPL CHEM,SALFORD M5 4WT,LANCS,ENGLAND

来源：

ZEOLITES | 1993年 / 13卷 / 08期

关键词：

ZEOLITES; CATION EXCHANGE; HYDROXIDE PRECIPITATION; PH MEASUREMENT; Q-SIZE PARTICLES;

D O I：

10.1016/0144-2449(93)90139-T

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：

Zeolites of types A, X, and Y were modified by cation exchange in salt solutions of heavy metals. Because of the alkaline reaction of these zeolites in aqueous solutions, heavy metal hydroxides of low solubility precipitated. pH measurement during the exchange process enabled the direct monitoring of the consecutive reactions of precipitation and dissolution of hydroxides and the calculation of the amount of precipitated hydroxide. Sulfidation of heavy metal ion-exchanged zeolites produced semiconductor particle-loaded zeolites of which the light absorption behavior was sensitive to the extent of the side reaction of hydroxide precipitation prior to the sulfide formation.

引用

页码：658 / 662

页数：5

共 19 条

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