Synthesis and Development of Fe3O4/SiO2/C Nanocomposite as NH4+ Ion Adsorbent from Shrimp Pond Output Water Using Phenate Method Alif Alfarisyi Syah1 , Anugrah Ricky Wijaya1* , and Lukluatus Syavika1
Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Malang, Jl. Semarang 5 Malang 65145, Indonesia
Abstract. The high ammonium content in the aquatic environment originating from the output water of shrimp ponds has a negative impact if in high concentrations it has the potential to cause disturbance and pollution in aquatic ecosystems. To reduce the ammonium content, we use nano adsorbent. Furthermore, the synthesis of Fe3O4/SiO2/C nanocomposite as an ammonium ion adsorbent was carried out. Nanocomposites were synthesized by the coprecipitation method. Carbon was synthesized from polyethylene terephthalate (PET) plastic waste to coat Fe3O4/SiO2 nanocomposites. The availability of PET is very abundant, the carbon content is high, the impurities are low, the cost is cheap, and the activated carbon produced has a large surface area so that it has maximum potential in the ammonium ion adsorption process. Carbon activation was carried out by the chemical activation method and KOH as an activator reagent because it can produce activated carbon with a large surface area, adsorption capacity, mesoporous volume, and total pore volume. Characterization of Fe3O4 nanoparticles, carbon, and Fe3O4/SiO2/C nanocomposites using XRD, FT-IR, VSM, SEM-EDX, BET instruments and for analysis of ammonium ion content after adsorption using the phenate method
