title: Removal of microcystin-LR from drinking water using a bamboo-based charcoal adsorbent modified with chitosan.
abstract: A new kind of low-cost syntactic adsorbent from bamboo charcoal and chitosan was developed for the removal of microcystin-LR from drinking water. Removal efficiency was higher for the syntactic adsorbent when the amount of bamboo charcoal was increased. The optimum dose ratio of bamboo charcoal to chitosan was 6:4, and the optimum amount was 15 mg/L; equilibrium time was 6 hr. The adsorption isotherm was non-linear and could be simulated by the Freundlich model (R2 = 0.9337). Adsorption efficiency was strongly affected by pH and natural organic matter (NOM). Removal efficiency was 16% higher at pH 3 than at pH 9. Efficiency rate was reduced by 15% with 25 mg/L NOM (UV254 = 0.089 cm(-1)) in drinking water. This study demonstrated that the bamboo charcoal modified with chitosan can effectively remove microcystin-LR from drinking water.
authors.affiliation: College of Biology and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China. zhanghangjun@gmail.com
authors.forename: Hangjun
authors.initials: H
authors.lastname: Zhang
authors.forename: Guoying
authors.initials: G
authors.lastname: Zhu
authors.forename: Xiuying
authors.initials: X
authors.lastname: Jia
authors.forename: Ying
authors.initials: Y
authors.lastname: Ding
authors.forename: Mi
authors.initials: M
authors.lastname: Zhang
authors.forename: Qing
authors.initials: Q
authors.lastname: Gao
authors.forename: Ciming
authors.initials: C
authors.lastname: Hu
authors.forename: Shuying
authors.initials: S
authors.lastname: Xu
mesh_terms: D000327:Adsorption; D031723:Bambusa / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D060766:Drinking Water / Q000737:chemistry*; D008387:Marine Toxins; D052998:Microcystins / Q000737:chemistry / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D060766:Drinking Water; D008387:Marine Toxins; D052998:Microcystins; D014874:Water Pollutants, Chemical; D002606:Charcoal; D048271:Chitosan; C057862:cyanoginosin LR