Ammonia removal from fish pond water using sodium hydroxide modified zeolite

Claudia, Jeannete Cindy and Soetardji, Jennifer Pieter (2015) Ammonia removal from fish pond water using sodium hydroxide modified zeolite. Working Paper (Laporan Penelitian Laboratorium (FT-Kimia)). Faculty of Engineering, Surabaya. (Unpublished)

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The excessive amount of ammonia could lethal for fish in aquaculture. Some of previous studies have been investigated that zeolite is very effective adsorbent to adsorb ammonium ion from water surface. Recently, the natural zeolite modified by sodium chloride to enhance the active site from the adsorbent, however it could adsorb much more ammonium ions from water. In this study, natural and modified zeolites were used to remove ammonium ions from NH4Cl synthetic solution and Koi pond water. The objective of present study was to investigate the ability of zeolite to remove ammonium by modified zeolite with sodium hydroxide which is a strong base. The modification of zeolite was conducted using sodium hydroxide solution at 75oC for 24 h. Langmuir, Freundlich, Sips, and Toth equations with their temperature dependent forms were used to represent the adsorption equilibria data. The Langmuir and its temperature dependent forms could represent the data better than other models. The pseudo-first order has better performance than pseudo-second order in correlating the adsorption kinetic data. The controlling mechanism of the adsorption of NH4+ from aqueous solution onto NatZ and 6M-Z was dominated by physical adsorption. The competition with other ions occurred through different reaction mechanisms so it decreases the removal efficiency of ammonium ions by the zeolites. For 6M-Z zeolite, the removal efficiency decrease from 81% to 66.9% in NH4Cl synthetic solution comparing with Koi pond water. Thomas model can represent the experimental data for both adsorption of ammonia from aqueous solution or from Koi pond water. This continuous data experiment was calculated for represent breakthrough curves for the dynamic sorption data. The fitting of the models conducted by SigmaPlot software (version 12.0). The characteristics of adsorbent was analyzed by scanning electron microscopy (SEM) for surface morphology, X-ray Diffraction (XRD) data shows the kind of zeolite which is used in this experiment, X-ray Fluorescence (XRF) to convince the Na+ ions were enhanced after zeolite has been modified with sodium hydroxide and nitrogen sorption to determine the pore volume. Based on the result, zeolite modified with sodium hydroxide can be suggested being a suitable ion exchange for ammonium ions removal, and it more potentially to uptake the ammonium ion than a natural zeolite and zeolite modified sodium chloride as previous study.

Item Type: Monograph (Working Paper (Laporan Penelitian Laboratorium (FT-Kimia)))
Department: ["eprint_fieldopt_department_Faculty of Engineering" not defined]
Subjects: Engineering > Chemical Engineering
Divisions: Faculty of Engineering > Chemical Engineering Study Program
Depositing User: Users 2637 not found.
Date Deposited: 26 Jan 2016 04:19
Last Modified: 26 Jan 2016 04:19

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