RESEARCH ON THE DISTRIBUTION OF MINERNAL ELEMENTS IN WHEAT STRAW

摘要：

The distribution of mineral elements in wheat straw was studied by energy dispersive X-ray spectrometer (EDS) attached to scanning electron microscopy (SEM). The results show that, the sorts and content of mineral elements are quite different in various parts of wheat straw. There are two sorts of outer surfaces of wheat stem. The major one is smooth and with longitudinally parallel stripes, and the other one with many granules and stomas. The silicon content in the cuticle is high, over 50％. The Si dot map image of the outer surface is uneven. The silicon content is much higher in the nodes, leaves and ears of wheat straw, and lowest in fibers, about l/30~l/140 of that in the cuticle of wheat stem. Silicon is the key element in the bio-structure of wheat straw. Therefore, it is of great importance to strengthen preparation, develop new pretreatment technology and remove the nodes, leaves, ears and stem cuticles of wheat straw effectively in order to realize the highefficiency cleaner production of wheat straw pulp.

关键词： mineral element wheat straw SEM-EDS preparation silicon-removing

作者: NaYun

作者单位: State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou 510640, China Department of Chemical Engineering, Guangdong Industry Technical College, Guangzhou 510300, China

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 150-153

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）