Abstract
Toxic metals ions are well known undesirable pollutant in drinking water. Since they are barely biodegradable and can be accumulated in human body through the food chain to induce a severe threat to human health; it is of great importance to develop low cost, safe and highly effective adsorbents for the adsorptive removal of those toxic metals. Synthesis and Characterization of Inorganic–organic hybrid Tungsten oxide-ethylenediamine (WO x –EDA) nanowires have been carried out by a simple, low-cost and high-yield solvo-thermal method. Activated Alumina was also synthesized using direct method. Both Tungsten Oxide ethylenediamine and Activated Alumina (AA) were characterized using, Fourier Transform Infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The synthesized inorganic adsorbents adsorption capacities for removing mercury and chromium were investigated using batch adsorption process. The equilibrium data were applied to various sorption kinectic models. The adsorbents adsorptive capabilities were compared. The adsorbents displayed exceptional adsorptive properties; however, WOx-EDA proved to be better adsorbent than activated alumina in terms of removal efficiency. This could be linked to hybrid structure integrated in the functionality of ethylenediamine with the stability of the WO x frameworks. The nanowire morphology and abundant functional amino groups possibly endowed the complex with versatile abilities and highly adsorptive properties. Keywords : Adsorption, Toxic, alumina, Tungsten Oxide Ethylenediamine, Kinetic. DOI : 10.7176/CMR/11-5-03 Publication date :May 31 st 2019
Highlights
It has been interesting to develop an adsorbent demonstrating a high adsorption capacity and low cost for removing various pollutants from contaminated waters
Toxic metals can be removed from human system through complexation, ion exchange, chelation and adsorption (Jia Qian and Ashekuzzaman, 2012)
Activated alumina was successfully synthesized via a simple direct method
Summary
It has been interesting to develop an adsorbent demonstrating a high adsorption capacity and low cost for removing various pollutants from contaminated waters. Inorganic chemical adsorbents have been studied widely, aiming at providing an alternative to the activated carbon in the treatment of surface and ground water and industrial effluents that contains toxic metal. Some metals are toxic when they form poisonous soluble compounds. Certain metals have no role biologically and are toxic when in a certain forms. Toxic metals can be removed from human system through complexation, ion exchange, chelation and adsorption (Jia Qian and Ashekuzzaman, 2012). Adsorption is a process that occurs when an adsorbate accumulates on the surface on an adsorbent, forming a molecular or atomic film. Important properties of adsorbents are adsorption capacity, density, specific surface area, porosity, selectivity and catalytic properties. Adsorbent porosity is the ratio of the volume of the pores and capillaries within the particle to the total volume of the particle (Buekens and Zyaykina, 2001)
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