Modification of Chaetoceros sp. Biomass with Silica-Magnetite Coating and Adsorption Studies towards Cu(II) Ions in Single and Binary System

Abstract

Adsorbent synthesis from Chaetoceros sp. biomass with silica-magnetite coating technique (ASMC) and without magnetite (ASC) has been performed through the sol-gel process. Both adsorbents were characterized by infrared spectrophotometer, X-Ray diffraction and scanning electron microscopy. The adsorption process of Cu(II) ions was performed in a single and binary systems using batch method. The adsorption data of Cu(II) ions on ASC and ASMC within a single system follows the pseudo kinetic model of order 2 with the adsorption rate of Cu(II) ions on ASMC faster than ASC. The adsorption isotherm model of Cu(II) ions on ASC and ASMC tend to follow Langmuir adsorption isotherm model with adsorption capacity of 57.77 and 105.91 mg g -1 , respectively. The ASMC material is not selective for Cu(II) ions with the ion pairs such as Ni(II), Zn(II), Cd(II) and Pb(II) ions.

Application of modified green algae Nannochloropsis sp. as adsorbent in the simultaneous adsorption of Methylene Blue and Cu(II) cations in solution

“…This shows that the active groups in adsorbents derived from algal biomass (hydroxyl, carbonyl, and amines groups) and silica matrix (siloxan and silanol groups) as well as the magnetic properties of adsorbents can increase the quantity of available active sites on the adsorbent [6,7] Langmuir Freundlich greater than that on ASN. The increased adsorption on ASN-MPs occurred because modification of algal biomass with silica followed by coating with magnetite particles had increased the number of adsorption active sites and made ASN-MPs to be magnetic.…”

“…From some of these technologies, the adsorption method is more often used for the treatment of aqueous waste containing heavy metals or hazardous dyes. This is done with the consideration that the process of adsorption method is easy, the cost applied is not expensive, and it is safe for the environment [7]. Sorption processes typically use adsorbents derived from the synthesis or modified natural material.…”

Application of modified green algae Nannochloropsis sp. as adsorbent in the simultaneous adsorption of methylene blue and Cu(II) cations in solution

“…This shows that the active groups in adsorbents derived from algal biomass (hydroxyl, carbonyl, and amines groups) and silica matrix (siloxan and silanol groups) as well as the magnetic properties of adsorbents can raise the quantity of available active sites on the adsorbent [9,10,31] [55].…”

“…From some of these technologies, the adsorption method is more often used for the treatment of liquid waste containing heavy metals or hazardous dyes. This is done with the consideration that the process of adsorption method is really easy, the cost applied is not expensive, and it is safe for the environment [10]. Sorption processes typically use adsorbents derived from the synthesis or modified natural material.…”

Application of Modified Green Algae Nannochloropsis sp. as Adsorbent in the Sequential Adsorption of Methylene Blue and Cu(II) Cations in Solution

“…From some of these technologies, the adsorption method is more often used for the treatment of liquid waste containing heavy metals or hazardous dyes. This is done with the consideration that the process of adsorption method is really easy, the cost applied is not expensive, and it is safe for the environment [12][13]. Sorption processes typically use adsorbents derived from the synthesis or modified natural material.…”