Abstract
In this research, biomass modification of Nannochloropsis sp. with surfactant cetyltrimethylammonium bromide (CTAB) through a cation exchange reaction to produce adsorbent Nannochloropsis sp.-cetyltrimethylammonium bromide (AlgN-CTAB) has been carried out. Biomass modification of Nannochloropsis sp. by CTAB has been successfully carried out through confirmation from the analysis data produced by Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDX). AlgN-CTAB adsorbent has been tested for its adsorption ability against anionic dye of methyl orange (MO) in solution by way of a sequence of experiments by the batch method. The optimum conditions for MO removal from the solution occurred at an adsorbent quantity of 0.1 g, pH of 5, and an interaction time of 60 min. MO adsorption kinetic data by AlgN and AlgN-CTAB tended to take the kinetic model of pseudo-second-order (PSO) with PSO rate constant ([Formula: see text]) values of 0.56 and 2.17 g mg-1 min-1, serially. The MO adsorption isotherm pattern by AlgN tends to take the Freundlich adsorption isotherm, whereas in AlgN-CTAB it follows the Langmuir and Dubinin-Radushkevich adsorption isotherms. The results of the adsorption-desorption of MO by AlgN-CTAB with 4 repetition cycles resulted in % removal of [Formula: see text]. The AlgN-CTAB adsorbent can be used repeatedly and is very effective in absorbing MO in water.
Highlights
One of the major problems at this time is water contaminants which are caused by various activities of human life
Methyl orange and other chemicals required for the process of algal biomass modification and adsorption such as NaCl, cetyltrimethylammonium bromide (CTAB), HCl, NaOH, citrate, and phosphate buffer are of analytical reagent (AR) grade and purchased based on the European Pharmacopoeia
AlgNCTAB is an adsorbent based on the algal biomass of Nannochloropsis sp. modified by cation exchange reaction using CTAB surfactant
Summary
One of the major problems at this time is water contaminants which are caused by various activities of human life. Increasing technological and industrial advances so far have increased the release of unwanted contaminants like dyes, toxic metals, and pesticides into the surroundings [1, 2]. This waste is generated from the by-products of processing industrial materials such as textiles, tannery, rubber, plastics, food, and cosmetics which can have an impact on the health of living things and their ecosystems [3, 4]. One industry that is often found to produce dangerous contaminants like dyes resulting in toxic chemicals is the industry of textile. Dyes are able to lead to a rise in biological oxygen demand (BOD) and can transmit waterborne diseases they just produce a little share to the amount of organic charge in wastewater [7]
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