title: Efficient removal of both cationic and anionic dyes from aqueous solutions using a novel amphoteric straw-based adsorbent.
abstract: In the current paper, a novel amphoteric straw-based adsorbent was prepared and applied to adsorb various dyes from aqueous solutions. The amphoteric adsorbent was proven effective in eliminating both cationic and anionic dyes (methylene blue and acid green 25), especially at corresponding favored pH conditions. The fundamental adsorption behavior of the adsorbent on removing various dyes was also investigated at different temperatures. The adsorption isotherms were all best-fitted by the Langmuir equation, whereas the adsorption kinetics was well-described by both the pseudo-second order model and the Elovich model. The experimental result revealed that the adsorption mechanism followed the monolayer chemical adsorption with an ion-exchange process.
authors: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
authors: Wenxuan
authors: W
authors: Zhang
authors: Hu
authors: H
authors: Yang
authors: Lei
authors: L
authors: Dong
authors: Han
authors: H
authors: Yan
authors: Haijiang
authors: H
authors: Li
authors: Ziwen
authors: Z
authors: Jiang
authors: Xiaowei
authors: X
authors: Kan
authors: Aimin
authors: A
authors: Li
authors: Rongshi
authors: R
authors: Cheng
mesh_terms: D000327:Adsorption; D000838:Anions / Q000032:analysis / Q000302:isolation & purification*; D002021:Buffers; D002412:Cations / Q000032:analysis / Q000302:isolation & purification*; D004396:Coloring Agents / Q000032:analysis / Q000302:isolation & purification*; D004526:Efficiency; D017743:Equipment Reuse; D007220:Industrial Waste; D007700:Kinetics; D008954:Models, Biological; D012996:Solutions / Q000737:chemistry; D014908:Triticum / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D000838:Anions; D002021:Buffers; D002412:Cations; D004396:Coloring Agents; D007220:Industrial Waste; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water