CAJ | 학술논문

分别采用超纯水、硼酸盐缓冲溶液和自来水配制含溴离子水,考察投加不同硅铝比的ZSM-5沸石对臭氧氧化过程中溴酸根生成量的削减效果及机理.结果表明,在三种不同介质中,ZSM-5沸石对溴酸根生成量的削减效果依次为:超纯水>硼酸盐缓冲溶液>自来水;硅铝比为300的ZSM-5沸石的削减效果最好,在硼酸盐缓冲溶液体系中,反应30min后可使溴酸根的生成量减少66%.硅铝比为300的ZSM-5沸石对溴离子和溴酸根均无明显的吸附作用,但可显著减少臭氧分解过程中的H_2O_2产量,这是其削减溴酸根生成量的主要原因.
분별채용초순수、붕산염완충용액화자래수배제함추리자수,고찰투가불동규려비적ZSM-5비석대취양양화과정중추산근생성량적삭감효과급궤리.결과표명,재삼충불동개질중,ZSM-5비석대추산근생성량적삭감효과의차위:초순수>붕산염완충용액>자래수;규려비위300적ZSM-5비석적삭감효과최호,재붕산염완충용액체계중,반응30min후가사추산근적생성량감소66%.규려비위300적ZSM-5비석대추리자화추산근균무명현적흡부작용,단가현저감소취양분해과정중적H_2O_2산량,저시기삭감추산근생성량적주요원인.
Bromide-containing water was prepared by pure water, borate buffer solution and tap water, and the reduction efficiency and mechanism of bromate formation during ozonation by ZSM-5 zeolite with different Si/Al ratios were investigated. The effect of ZSM-5 zeolite on bromate formation is most effective in pure water followed by borate buffer solution and tap water. The ZSM-5 zeolite with Si/Al ratio of 300 is most effective in reducing bromate formation among the selected ZSM-5 zeolites, and the bromate formation is decreased by 66% after 30 min in borate buffer solution system. The ZSM-5 zeolite with Si/Al ratio of 300 has no adsorption effect on bromide ion and bromate. The concentration of hydrogen peroxide formed during ozone decomposition is significantly reduced, contributing to reduction of bromate formation during ozonation of bromide-containing water.