小麦秸秆的γ辐照与NaOH溶液的协同预处理  

Pretreatment of Wheat Straw by γ-ray Radiation and Alkali Solution

作　　者：沈志强[1] 杨春平[1] 喻国策[2] 王建龙[2] 

机构地区：[1]湖南大学环境科学与工程学院,湖南长沙410082 [2]清华大学核能与新能源技术研究院环境技术研究室,北京100084

出　　处：《原子能科学技术》2009年第4期304-310,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(50678089)

摘　　要：通过考察辐照剂量、辐照与NaOH溶液浸泡组合顺序、NaOH溶液浓度、NaOH溶液浸泡时间等因素,研究了较低剂量辐照与NaOH溶液温和浸泡协同预处理工艺。对还原糖得率、组分改变、结晶度等进行了分析,对该协同工艺的作用机理进行了探讨。实验结果表明,单纯的较低剂量辐照对麦秸的组分及结晶度的改变作用不明显,但可大幅降低后续碱浸泡所需的用量和时间。经组合工艺处理后,麦秸的相关特征参数均发生了明显改变。较适宜的组合预处理工艺为小麦秸秆经100 kGy辐照,然后以2%NaOH溶液浸泡1 h,其酶解还原糖得率达到理论产率的78.2%。Gamma ray radiation and alkali solution pretreatment of wheat straw and its effect on enzymatic hydrolysis were studied. The result shows that the γ-irradiation can significantly decrease the initial concentration of alkali solution and shorten the pretrea- ted time, but the changes in the physical and chemical properties of only irradiated wheat straw are indistinctive. A synergistic effect between irradiation and alkali solution pretreatment was observed. Reducing sugar yield is 78.2% （accounted for theoretical yield） after wheat straw is radiated at a dose of 100 kGy and then with 2%NaOH pretreated forl h.

关 键 词：小麦秸秆 Γ辐照 NAOH溶液 预处理 酶水解 

分 类 号：O642[理学—物理化学]