Study on Re-Using Media from Iron and Manganese Biological Removal Filter for Defluoridation

Abstract:

The filter media from iron and manganese biological removal filter which w- as replaced by new termly can be re-used. The sand filter media was characterized u- sing the SEM and owns developed interspaces. Drying the sand filter media at 110°C, then inspect and analyse its character and mode of defluoridation。The results show as follows. Under the test condition ,the adsorption balance can come out in about 3 hou-rs , the fluoride sorption on the re-used matured filter media followed pseudo-second kinetics. The effect of defluoridation by the matured filter media will be better within the range of pH 3~7, and best at about pH 4.58. The primary mode of fluoride sorpti- on is chemism, but physical sorption is also in existence , and the adsorption isother- ms could be described by Langmuir equation. Contact-time is a vary important factor in the continuous-flow column experiment. The effect of fluoride removal is long，as the height of filter column is controlled as 40cm.The filter media from iron and manga- nese biological removal filter possess potential of perfect sorbent, space for deeply study and foreground of practical application.

• Periodical: Advanced Materials Research (Volumes 113-116)
• Pages: 1472-1475
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.113-116.1472
• Online since: June 2010
• Authors: Xing Guan Ma, Tie Shan Ming, Wei Cui, Jin Xiang Fu, Zhi Xiao Ma, Zi Wang
• Keywords: Defluoridation, Filter Media, Removal of Iron, Removal of Manganese, Reuse

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