【作者】 王华芳；

【导师】 马伟；

【作者基本信息】 大连理工大学 ， 无机化学， 2005， 硕士

【摘要】 近年来,由于藻类过量繁殖引发的富营养化给工业循环冷却水系统带来了严重的危害。因此,循环水体的处理具有必要性和迫切性,而水中除藻也成为当前研究的热点。本课题设计了以带有涂层的钛网做为电极,以活性炭为基础填入其他填料的反应装置,针对影响电化学灭藻技术的因素和影响藻类生长的因素,进行了相关的单因素和正交实验,研究了电解-吸附协同作用的灭藻效果和灭藻过程,首次成功地利用微电解--吸附协同作用设计出新型的灭藻反应器,并对灭藻机理进行了探讨,实验结果表明:1、 微电解-吸附协同作用对于循环水具有理想的灭藻效果,并且该方法也适用于其它循环水系统（如海水作为循环冷却水）的防污、灭藻控制。当电流密度为20-30mA/cm2,处理时间为15-25分钟时,灭藻率就达到93. 8%.96. 6%,灭藻效果比较理想。2、 在电流密度为10-30mA/cm2之间时,电解-吸附协同作用对氨氮的脱除率为82%-74%,对总磷的脱除率为88%-79%,且低电流密度更有利于总磷和NH4+-N的去除。3、 在微电解-吸附协同处理过程中,微电解吸附过程与单纯吸附过程相似,均符合修正的Freundlich模型,但模型常数Kf和1/n均远小于单纯吸附模型中的常数,说明浓度对吸附量的影响大大减小,静电引力是强化吸附过程的主要作用力。4、 微电解-吸附协同作用的主要灭藻机制是:活性炭和电气石将水体中的微生物快速吸附到其表面,强化电极表面发生电化学反应生成大量活性物质（如活性氯、·OH、O₂、 O₃、 H₂O₂等）对于藻等微生物的氧化灭活作用,并且经过处理的水具有很强的持续灭藻作用。由于电气石的特性,对微电解反应起到了较好的协同效应,使析氯电位低,更容易产生氯气。因此,本课题的开展对于今后电化学过程的灭藻消毒应用,具有指导和借鉴意义,也为电化学灭藻技术开辟了新的途径。更多还原

【Abstract】 In recent years, Because of the over propagation of algae and eutrophication, the industrial recirculation cooling water systems has been seriously damaged. Therefore, it is necessary and urgent to treat recirculation water. Algae control has been a hotspot at present.Aiming at the main factors of electrochemical disinfection technology and the main factors of algae growth, this thesis designs many single factor and supersaturate experiments so as to do some researches in the effect and the process of algea killing by micro-electrolysis adsorption synergistic action. This research work uses the titanium net with coat as the electrode, filled with padding, has designed a new algae killing reactor by micro-electrolysis adsorption synergistic action for the first time. The operation mechanism was disgussed. Experments results demonstrate:1. Micro-electrochemical adsorption synergistic action is efficient to control algae in recirculation water system, and it is also efficient to other recirculation water system（such as seawater recirculation water system） .When the treatment electricity density is about 20-30 mA/cm², the treatment time is about 15-25 minutes ,the sterilization ratio reach 93.8%-96.6%.2. When the electricity density is about 10-30 mA/cm²,the removal ration of NH₄⁺-N can reach 82%-74%, the removal ration of TP can reach 88%-79%, and low electricity density makes for good removal effect of NH₄⁺-N and TP.3.The process of micro-electricity adsorption is resemble to the simple adsorption ,which are all according to the emendatory Freundlich model.But the parameter Kfand 1/n are all more less than the parameter of simple adsorption model,this demonstrates that the effect of concentration on the count adsorption is minished, the main force is electrostatic gravitation in the intensive adsorption.4. The operation mechanism of micro-electrochemical adsorption synergistic action is that the algae is adsorbed to the exterior of activated carbon and the tourmaline firstly, When the electrode is electrified, some electrochemical reactions happen, which produce some disinfectants, such as Cl₂,OH, O₂,O₃ and H₂O₂ etc, and all these can control multiplying efficiently. In addition, some experiments have proved that electrochemical technology can still sterilize algae without electrolyzing. Because of its speciality, the tourmaline has a good synergistic effect on electrodereaction which hastens the electrode producing much more chlorine by steping down the with low chlorine evolution potential.This research will help to the application of electrochemical technology in algae killing and disinfection. It also put forward new solution to control algae.更多还原