化工学报2018，Vol.69Issue(6)：2737-2743,7.DOI:10.11949/j.issn.0438-1157.20171500
表面重构石英砂滤料的制备及微生物附着行为
Preparation of surface reconstructed quartz sand and attachment behavior of microorganism
摘要
Abstract
Ordinary quartz sand has some defects such as smooth surface, small specific surface area and poor performance of attach microorganisms. To improve the surface texture of quartz sand and promote microorganism adhesion on the filter, it is an effective method to etch on the quartz sand with buffered oxide etch (BOE). The results of SEM shows that the morphology of the surface reconstructed quartz sand is obviously changed and the global morphology is grooved. Factorial experiment demonstrates that modified quartz sand has more grooves on the surface whose width is between 1.0—5.0 μm and the biomass increases from 9.3 nmol P·g?1to 15.7 nmol P·g?1after modification, under the condition of corrosive liquid concentration is 15%(mass), the mass ratio of HF and NH4F is 1:1, the reaction temperature is 55℃, and the reaction time is 45 minutes. The result of FTIR reveals that the Si—O is transformed to Si—OH, the disappearance of organic characteristic peaks indicates the removal of organic material. After the surface modification, surface area of quartz sand increases from 0.427 m2·g?1to 1.475 m2·g?1, and the removal rate of CODCrincreased from 41.9% to 51.6%. Hence the modified quartz sand has a preferable microbiological compatibility.关键词
石英砂/表面重构/制备/化学蚀刻/生物膜Key words
quartz sand/surface reconstruction/preparation/chemical etching/biofilm分类
资源环境引用本文复制引用
李思敏,王让,徐宇峰..表面重构石英砂滤料的制备及微生物附着行为[J].化工学报,2018,69(6):2737-2743,7.基金项目
国家水体污染控制与治理科技重大专项项目(2012ZX07203-003) （2012ZX07203-003）
邯郸市科学技术研究与发展计划项目(1213109010G).supported by the Major Science and Technology Program for Water Pollution Control and Treatment(2012ZX07203-003) and the Science and Technology Research and Development Program of Handan(1213109010G). （1213109010G）
