Comparative adsorption of metal and dye on flake- and bead-types of chitosans prepared from fishery wastes.
The adsorption capacities and rates of Cu(II) and a commercial reactive dye RR222 on flake- and bead-types of chitosans prepared from three fishery wastes (shrimp, crab, and lobster shells) were compared at 30 degrees C. It was shown that all equilibrium isotherms could be well fitted by the Langmuir equation. The adsorption capacity of Cu(II) on flake- and bead-types of chitosans appeared to be comparable, but the adsorption capacity of RR222 on bead type was much larger than that on flake type by a factor of 2. 0-3.8. The rates of dye adsorption on both types of chitosans indicated different controlling mechanisms. In addition, the bead type of chitosans exhibited a greater rate compared to the flake type.
Wu
F C
FC
Department of Chemical Engineering, National Lien-Ho Institute of Technology, Miao-Li 360, Taiwan.
Tseng
R L
RL
Juang
R S
RS
D000327:Adsorption; D000818:Animals; D003386:Brachyura; D002614:Chelating Agents / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002686:Chitin / Q000031:analogs & derivatives* / Q000737:chemistry; D048271:Chitosan; D004396:Coloring Agents / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D033364:Decapoda; D005398:Fisheries; D007220:Industrial Waste / Q000517:prevention & control; D009282:Naphthalenesulfonates / Q000737:chemistry*; D008121:Nephropidae; D012758:Shellfish; D013054:Spectrophotometry, Atomic; D013499:Surface Properties; D013696:Temperature; D014227:Triazines / Q000737:chemistry*
D002614:Chelating Agents; D004396:Coloring Agents; D007220:Industrial Waste; D009282:Naphthalenesulfonates; D014227:Triazines; C098610:reactive red 2; D002686:Chitin; D003300:Copper; D048271:Chitosan