RECOVERY OF LACTIC-ACID BY SORPTION - RESIN EVALUATION

被引：33
|
作者：
EVANGELISTA, RL
MANGOLD, AJ
NIKOLOV, ZL
机构：
[1] IOWA STATE UNIV SCI & TECHNOL,DEPT FOOD SCI & HUMAN NUTR,AMES,IA 50011
[2] IOWA STATE UNIV SCI & TECHNOL,DEPT AGR & BIOSYST ENGN,AMES,IA 50011
来源：
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY | 1994年 / 45-6卷
关键词：
LACTIC ACID; RECOVERY; SORPTION; ION EXCHANGE;
D O I：
10.1007/BF02941793
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Weak-, moderate-, and strong-base resins were evaluated for their sorption capacities of lactic acid from solutions with different pHs. Composite isotherms and breakthrough curves indicated that the sorption capacities of weak- and moderate-base resins decreased markedly as the pH of the feed exceeded the pK(a) of lactic acid. The decrease in capacity was mainly the result of the decrease in concentration of undissociated lactic acid, the species preferentially adsorbed by the resin, as the pH of the feed increases. The sorption capacity of the strong-base resin remained constant in the same pH range (pH 2-6).
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页码：131 / 144
页数：14
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