Adsorption and precipitation of anionic dye Reactive Red 120 from aqueous solution by aminopropyl functionalized magnesium phyllosilicate

• Published in: The Korean journal of chemical engineering Vol. 36; no. 1; pp. 101 - 108
• Main Authors: Kim, Yong-Woon, Kim, Jung-Hun, Moon, Deok Hyun, Shin, Hyun-Jae
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.01.2019; Springer Nature B.V; 한국화학공학회
• Subjects: Adsorbents; Adsorption; Aqueous solutions; Biotechnology; Catalysis; Chemical precipitation; Chemistry; Chemistry and Materials Science; Clay; Dyes; Enthalpy; Environmental cleanup; Industrial Chemistry/Chemical Engineering; Magnesium; Materials Science; Reaction kinetics; Separation Technology; Thermodynamics; Wastewater treatment; 화학공학; Anionic Dyes; Clay; Magnesium Phyllosilicate; Precipitation; Reactive Red 120; Adsorption
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-018-0168-8

Dye wastewater causing destruction in ecosystem from a variety of plants an operation needs various factors for environmental cleanup. To improve removal efficiency of dye wastewater, various adsorbents including clay and nonclay-related materials have been tried. The use of soluble aminopropyl functionalized magnesium phyllosilicate (Mg-AMP clay) as an adsorbent for the textile anionic dye Reactive Red 120 (RR 120) was examined thermodynamically and kinetically. The adsorption kinetics followed the pseudo-second-order and Langmuir isotherm equation fitted best models. A maximum amount of adsorption was determined to be 229.9 mg/g, which is one of the highest values studied so far. An Mg-AMP clay dosage of 10 mg/mL obtained from Langmuir model a maximum adsorption capacity of 229.94, 182.26 and 156.54 mg/g at 298.15, 308.15 and 318.15 K, respectively. Moreover the thermodynamic activation parameters such as enthalpy and entropy were determined. We suggest the removal mechanism of RR 120 using Mg-AMP clay by adsorption and precipitation.