ADSORPTION OF TRIVALENT CHROMIUM FROM AQUEOUS-SOLUTIONS ONTO ACTIVATED CARBON

被引：91

作者：

LEYVARAMOS, R ^{[1
]}

FUENTESRUBIO, L ^{[1
]}

GUERREROCORONADO, RM ^{[1
]}

MENDOZABARRON, J ^{[1
]}

机构：

[1] UASLP,FAC CIENCIAS QUIM,CTR INVEST & ESTUDIOS POSGRADO,SAN LUIS POTOSI 78210,MEXICO

来源：

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY | 1995年 / 62卷 / 01期

关键词：

CHROMIUM (III) ADSORPTION; ACTIVATED CARBON; PH EFFECT; TEMPERATURE EFFECT; LIQUID PHASE ADSORPTION;

D O I：

10.1002/jctb.280620110

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The adsorption of chromium (III) onto activated carbon was investigated as a possible alternative method for its removal from aqueous solutions. The adsorption data were obtained in a batch adsorber and fitted the Langmuir adsorption isotherm well. The effect of pH on the adsorption isotherm was investigated at pH values of 2, 4, 5 and 6. It was found that at pH values below 2. the Cr(III) was not adsorbed and at pH values above 6.4 the Cr(III) was precipitated as Cr(OH)(3). Maximum adsorption occurred at pH 5. The pH plays a very important role in the adsorption of Cr(III) since Cr(III) can form different complexes in aqueous solutions. The adsorption capacity was increased by about 20% as the temperature was raised from 25 to 40 degrees C. It was concluded that Cr(III) is adsorbed to an appreciable extent on activated carbon and that the adsorption is highly dependent upon pH.

引用

页码：64 / 67

页数：4

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