Mass transport model of ions within biofilms under the effect of external field

作     者：WANG Jun TANG Xue-xi 

作者机构：College of Life Science and Technology Ocean University of China Qingdao 266003 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2006年第18卷第3期

页      面：604-609页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：The National Natural Science Foundation of China (No. 40506028 30270258) the Encouraging Foundation for Outstanding YouthScientists of Shandong Province (No. 03BS120) and the China Postdoctoral Science Foundation (No. 2005037237) 

主　　题：biofilms external field mass transport 

摘      要：A mass transport model was developed to predict the transport rate of ions within biofilms, which was experimentally verified using the fluxes of NH4^＋ and Ca^2＋ through the heterotrophic biofilms with the thickness varying from 230 to 1430μm under the effect of external field in the range of-20 V/m to 60 V/m. It is found that the result predicted by the model is in agreement with the experimentally obtained one, with the error less than 5 percent for the thin biofilms. The error increases with the increase of the biofilm thickness. The transport rate of ions caused by electric migration is affected by the charges, field strength, and biofilm thickness and so on.