Comparative Study on the Adsorption of [AuCl4]– onto Salicylic Acid and Gallic Acid Modified Magnetite Particles | Zendy

Maya Rahmayanti | Zendy; Sri Juari Santosa | Zendy; Sutarno Sutarno | Zendy

Open Access

Comparative Study on the Adsorption of [AuCl<sub>4</sub>]<sup>–</sup> onto Salicylic Acid and Gallic Acid Modified Magnetite Particles

Author(s) -

Maya Rahmayanti,

Sri Juari Santosa,

Sutarno Sutarno

Publication year - 2017

Publication title -

indonesian journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.273

H-Index - 14

eISSN - 2460-1578

pISSN - 1411-9420

DOI - 10.22146/ijc.21150

Subject(s) - chemistry , adsorption , freundlich equation , magnetite , salicylic acid , gallic acid , langmuir , langmuir adsorption model , nuclear chemistry , chromatography , inorganic chemistry , precipitation , organic chemistry , metallurgy , biochemistry , materials science , physics , meteorology , antioxidant

Salicylic acid-modified magnetite (Mag-SA) and gallic acid-modified magnetite (Mag-GA) particles were prepared by co-precipitation procedure. Characterization results showed the interaction that occurs between the surface of magnetite with salicylic acid (Mag-SA) and gallic acid (Mag-GA) was through hydrogen bonding. Adsorption of [AuCl 4 ] – onto Mag-SA and Mag-GA surfaces as a function of initial pH, contact time, and initial concentration of the [AuCl 4 ] – solution were comparatively investigated. Result showed that the optimum adsorption of [AuCl 4 ] – onto Mag-SA or Mag-GA was found at pH 3. The adsorption process were found to allow the pseudo-second order equation, both for Mag-SA and Mag-GA. The parameters in isotherm adsorption equations conformed to the Langmuir and Freundlich isotherms very well for Mag-GA, but for Mag-SA, only conformed to the Langmuir isotherm very well. The result of this study demonstrate that the ability Mag-GA to adsorb [AuCl 4 ] – higher than Mag-SA.

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