title: Simultaneous removal of potent cyanotoxins from water using magnetophoretic nanoparticle of polypyrrole: adsorption kinetic and isotherm study.
abstract: Cyanotoxins, microcystins and cylindrospermopsin, are potent toxins produced by cyanobacteria in potable water supplies. This study investigated the removal of cyanotoxins from aqueous media by magnetophoretic nanoparticle of polypyrrole adsorbent. The adsorption process was pH dependent with maximum adsorption occurring at pH 7 for microcystin-LA, LR, and YR and at pH 9 for microcystin-RR and cylindrospermopsin (CYN). Kinetic studies and adsorption isotherms reflected better fit for pseudo-second-order rate and Langmuir isotherm model, respectively. Thermodynamic calculations showed that the cyanotoxin adsorption process is endothermic and spontaneous in nature. The regenerated adsorbent can be successfully reused without appreciable loss of its original capacity.
authors.affiliation: School of Industrial Technology, University Sains Malaysia, George Town, Penang, 11800, Malaysia. sufiahena@usm.my.
authors.forename: S
authors.initials: S
authors.lastname: Hena
authors.affiliation: School of Industrial Technology, University Sains Malaysia, George Town, Penang, 11800, Malaysia.
authors.forename: R
authors.initials: R
authors.lastname: Rozi
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: S
authors.initials: S
authors.lastname: Tabassum
authors.affiliation: School of Industrial Technology, University Sains Malaysia, George Town, Penang, 11800, Malaysia.
authors.forename: A
authors.initials: A
authors.lastname: Huda
mesh_terms: D000327:Adsorption; D001427:Bacterial Toxins / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D000458:Cyanobacteria; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D052998:Microcystins / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
chemical_list: D001427:Bacterial Toxins; D058185:Magnetite Nanoparticles; D052998:Microcystins; D011108:Polymers; D011758:Pyrroles; D014874:Water Pollutants, Chemical; C067635:polypyrrole
keywords: Adsorption; Conducting polymer; Cylindrospermopsin; Microcystins; PPy/Fe3O4