CAJ | 학술논문

为使铝型材生产产生的含氟废水经处理后达到[F -]≤20 mg· L -1的要求，采用CaCl2进行除氟处理，对不同工艺条件下含氟废水的处理效果进行分析。结果表明：pH值范围宜控制在6．0～8．0之间，当氟单离子浓度在200～300 mg· L -1时，投加CaCl2的量与F -质量比为4∶1；当氟单离子浓度＜150 mg· L -1时，需增大CaCl2的投加量，沉淀时间应≥2 h。
위사려형재생산산생적함불폐수경처리후체도[F -]≤20 mg· L -1적요구，채용CaCl2진행제불처리，대불동공예조건하함불폐수적처리효과진행분석。결과표명：pH치범위의공제재6．0～8．0지간，당불단리자농도재200～300 mg· L -1시，투가CaCl2적량여F -질량비위4∶1；당불단리자농도＜150 mg· L -1시，수증대CaCl2적투가량，침정시간응≥2 h。
In order to treat the fluoride waste water produced by aluminum production to meet the requirment [ F -]≤ 20 mg· L -1 ,CaCl2 was used to remove fluoride in wastewater ,the treatment result of fluoride ionic was analyzed under different condition .The results showed that the value of pH should be controlled between 6.0and 8.0,and when fluorine ionic concentration was 200 ~300mg· L -1,the quality ratio of CaCl 2 and fluoride ion was 4∶1 .the quality ratio of CaCl 2 and fluoride ion increased when fluorine ionic concentration was <150 mg· L -1,the precipitation time should be longer than 2 hours.