title: Removal of basic dye (Astrazon Blue FGRL) using macroalga Caulerpa lentillifera.
abstract: The macroalga Caulerpa lentillifera was found to have adsorption capacity for a basic dye, Astrazon Blue FGRL. For the whole range of concentrations employed in this work (20-1280 mgl(-1)), the adsorption reached equilibrium within the first hour. The kinetic data corresponded well with the pseudo second-order kinetic model where the rate constants decreased as initial dye concentrations increased. At low dye concentrations (20-80 mgl(-1)), an increase in the adsorbent dosage resulted in a higher removal percentage of the dye, but a lower amount of dye adsorbed per unit mass (q). The adsorption isotherm followed both the Langmuir and Freundlich models within the temperature range employed in this work (18-70 degrees C). The highest maximum adsorption capacity (q(m)) was obtained at 50 degrees C. The enthalpy of adsorption was estimated at 14.87 kJmol(-1) suggesting a chemical adsorption mechanism.
authors.affiliation: National Research Center for Environmental and Hazardous Waste Management, Chulalongkorn University, 10330 Bangkok, Thailand. rolf.groeneveld@wur.nl
authors.forename: Khanidtha
authors.initials: K
authors.lastname: Marungrueng
authors.forename: Prasert
authors.initials: P
authors.lastname: Pavasant
mesh_terms: D000327:Adsorption; D046068:Caulerpa / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification*; D007220:Industrial Waste; D012394:Rosaniline Dyes / Q000737:chemistry / Q000302:isolation & purification*; D013784:Textiles; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: C511329:Astrazon Blue FGRL; D004396:Coloring Agents; D007220:Industrial Waste; D012394:Rosaniline Dyes; D014874:Water Pollutants, Chemical