摘要
研究臭氧化过程中,臭氧投加量、p H值和离子强度对可同化有机碳(assimilable organic carbon,AOC)生成量的影响.结果表明,臭氧投加量在1~5 mg·L^(-1)范围,AOC的生成量随着投加量的增加而增加,但过高的臭氧投加量(9 mg·L^(-1))反而导致AOC生成量下降.p H越高(6~9),AOC的生成量也越高.AOC的生成量随着离子强度的升高而下降.臭氧氧化强疏组分AOC的生成量最高,其次为弱疏,而极亲和中亲最低.研究发现,AOC的生成量与小分子有机物的SUVA有密切的关系,较低的SUVA产生较多的AOC.
The influences of ozone dosage,p H and ionic strength on the formation of Assimilable Organic Carbon（ AOC） during ozonation were investigated. The result demonstrated that within the range of 1-5 mg·L^-1O3,the formation of AOC increased with increasing ozone dosage,but higher ozone dosage（ 9 mg·L^-1） resulted in reduction of AOC formation. AOC formation increased with higher p H but decreased with increasing ionic strength. The result also showed that AOC formation with hydrophobic fraction（ HPO）was the most,followed by transphilic fraction（ TPI）,and charged hydrophilic fraction（ CHPI）,while neutral hydrophilic fraction（ NHPI） was the least. It was found that AOC formation related closely with SUVA of small molecular weight organics,and the lower SUVA produced more AOC.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2016年第5期1837-1844,共8页
Environmental Science
基金
国家水体污染控制与治理科技重大专项(2012ZX07403-001C)
关键词
生物稳定性
可同化有机碳
臭氧氧化
有机物相对分子质量
亲疏水组分
biological stability
assimilable organic carbon
ozonation
relative molecular weight of organics
hydrophobic/hydrophilic fractions
