张凤杰 超滤膜改性技术的研究进展(4)

聚醚砜膜的改性

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The Review of Surface Modification of Ultrafiltration Membrane

ZHANG Feng-jie ZHU Lan

(College of Life Science, Dalian Nationalities University, Dalian Liaoning 116600, China)

Abstract: With the development of membrane technology, people have a variety of requirements for UF membrane, one of which is to solve the fouling problem on the membrane surface. The fouling problem is paid the most attention in the field. Surface modification, especially, to introduce hydrophilic groups into the surface of the membrane is an effective way. This article reviews the progress in the field. The trends of UF membrane technology in the future are also discussed. Key words: ultrafiltration membrane; membrane fouling; surface modification

（责任编辑 邹永红）

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Investigation of the Biotoxicity Mechanism of Aromatic Hydrocarbons

Quantitatively by Means of Toxicity Ratio Xiao2 LEI Bing-li1 DONG Yu-ying1 FENG

(1. College of Life Science, Dalian Nationalities University, Dalian Liaoning 116600, China; 2. Department of Environmental Science and Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract: Acute toxicity of six substituted aromatic hydrocarbons, phenol, nitrobenzene, m-nitroaniline, p-phenylendiamine, catechol and chlorobenzene to Photobacterium phosphoreum was determined. The above compounds were classified into groups according to the toxicity ratio (TR) and the molecular structure characters. The toxic mechanism was discussed herein. Our results showed that chlorobenzene was nonpolar anesthetic, phenol, nitrobenzene and m-nitroaniline were polar anesthetic, p-phenylendiamine and catechol were reactive toxic.

Key words: photobacterium phosphoreum; substituted aromatic hydrocarbons; toxicity ratio (TR); toxic effect mechanism；identification method

（责任编辑 邹永红）