title: Application of activated carbons from coal and coconut shell for removing free residual chlorine.
abstract: This study investigated the removal of free residual chlorine by activated carbon (AC). ACs were prepared from coal (AC1) and coconut shell (AC2). The specific surface area of AC1 was larger than that of AC2. The removal of free residual chlorine increased with elapsed time and amount of adsorbent. The removal mechanism of free residual chlorine was the dechlorination reaction between hypochlorous acid or hypochlorite ion and AC. Moreover, AC1 was useful in the removal of free residual chlorine in tap water. The optimum condition for the removal of free residual chlorine using a column is space velocity 306 1/h; liner velocity 6.1 m/h.
authors.affiliation: Faculty of Pharmacy, Kinki University, Osaka, Japan.
authors.forename: Fumihiko
authors.initials: F
authors.lastname: Ogata
authors.forename: Hisato
authors.initials: H
authors.lastname: Tominaga
authors.forename: Ayaka
authors.initials: A
authors.lastname: Ueda
authors.forename: Yuko
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Yuka
authors.initials: Y
authors.lastname: Iwata
authors.forename: Naohito
authors.initials: N
authors.lastname: Kawasaki
mesh_terms: D001709:Biotechnology / Q000379:methods*; D002606:Charcoal / Q000737:chemistry*; D002713:Chlorine / Q000302:isolation & purification*; D003031:Coal; D003059:Cocos / Q000033:anatomy & histology* / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D013997:Time Factors; D014867:Water / Q000737:chemistry; D018508:Water Purification
chemical_list: D003031:Coal; D014867:Water; D002606:Charcoal; D002713:Chlorine