Abstract
In this study, it has been performed modification of Spirulina sp. algae biomass with silica (HAS) coated with magnetite particles (HASM) and its adsorption test on a solution of methylene blue dye (MB) in solution. The identification of functional groups from HASM adsorbent was studied using infra-red (IR) spectrophotometer, the degree of crystallinity of the material was determined by X-ray diffraction (XRD), while the morphology and HASM constituent elements were analyzed by Scanning Electron Microscopy-Energy-Dispersive-X-Ray (SEM-EDX). The HASM adsorption isotherm of MB solution was studied by applying adsorption experiments using the batch method. The concentrations of MB dye in the adsorption process were analyzed by a UV-Vis spectrometer. Adsorption of 100 mg L−1 MB dye solution by HASM adsorbent at pH of 6 with a contact time of 60 minutes resulted in an adsorbed MB amount of 90.90 mg g−1. The adsorption isotherm model of the MB dye solution in the HASM adsorbent tends to follow the model of Freundlich adsorption isotherm. The adsorbent HASM is the effective adsorbent to absorb MB dye in solution.
Highlights
Increasing industrial development has an influence on the environment, such as diverting pollution from chemicals both containing organic and inorganic [1]
Textile dyes are generally made from azo mixture and derivatives of benzene groups
It is expected that silica-Spirulina sp. algae hybrids with magnetite can produce adsorbents that are effective against methylene blue dye (MB) and environmentally friendly because they have no byproducts such as suspended solids
Summary
Increasing industrial development has an influence on the environment, such as diverting pollution from chemicals both containing organic and inorganic [1]. Absorption of substance molecules by algae biomass can occur through interaction with functional groups such as hydroxyl, carboxylic, amino and phosphate [9] It has been developed, the use of alternative adsorbents originating from nature because it is more economical, for example algal biomass. Some types of algae have received attention because of their high ability to adsorb ions or molecules through the existed functional groups in algal biomass and their use as biosorbents which can be reused for waste processing in solution. Algae hybrids with magnetite can produce adsorbents that are effective against MB and environmentally friendly because they have no byproducts such as suspended solids Using this technique cannot damage the structure so that the immobilization process of Spirulina sp. Using this technique cannot damage the structure so that the immobilization process of Spirulina sp. on silica matrix is expected to maintain the activity of functional groups provided in Spirulina sp. algae [13]
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