摘要
通过枯草芽孢杆菌发酵得到γ-聚谷氨酸(γ-PGA),并采用静态阻垢法评价γ-PGA的阻垢性能.研究了温度、pH值、Ca^(2+)浓度、γ-PGA分子量以及γ-PGA浓度对于该阻垢性能的影响,并对其阻垢产物进行结构表征以及对阻垢原理进行初步分析.研究结果表明,γ-PGA大分子和小分子均具有较强的阻垢作用,而小分子具有比大分子更加优良的阻垢特性.在阻CaSO_4垢和阻CaCO_3垢实验中,达到100%阻垢率时,小分子γ-PGA的最低浓度分别为4 mg/L和2 mg/L,而在相同条件下大分子γ-PGA的最低浓度均为20 mg/L.
Poly-γ-glutamic acid （γ-PGA） produced by fermentation of Bacillus sp was studied as a potential novel green scale inhibitor. The effects of γ-PGA concentration, molecular weight of γ-PGA, temperature, pH and Ca2＋concentration on the scale inhibiting rate of γ-PGA were respectively analyzed using static anti-scaling method, and the structural characterization of scale inhibiting products and possible mechanism were investigated. The results reveal that both large molecular γ-PGA and small molecular γ-PGA have inhibiting efficiency. More specifically, small molecular γ-PGA shows the better inhibiting efficiency with their lowest concentration to get 100% inhibiting efficiency from scale of CaSO4 and CaCO3 being 4 mg/L and 2 mg/L respectively, while large molecularγ-PGA to get the same efficiency in the same condition is 20 mg/L respectively.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期134-141,148,共9页
Journal of East China Normal University(Natural Science)
基金
上海市科委2008年重点科技攻关专项(08431902400)
国家"863"项目(2009AA03Z429)
关键词
Γ-聚谷氨酸
阻垢剂
阻垢性能
poly-γ-glutamic acid（γ-PGA）
scale inhibitor
scale inhibiting behavior
作者简介
第一作者：孙昭，男，硕士研究生，研究方向为生物化学与分子生物学．通讯作者：吴自荣，男，教授，研究方向为基因工程与基因工程药物．E—mail：zrwu@bio．ecnu．edu．cn．
