American Journal of Chemistry and Application 2018; 5(3): 29-34 http://www.aascit.org/journal/ajca ISSN: 2375-3765 Novolac Resin-Based Networks for Adsorptive Removal of Azo Dye (Orange-II) Samaresh Ghosh 1, * , Mridula Acharyya 1 , Subal Chandra Manna 2 1 Department of Chemistry, Bankura Sammilani College, Bankura, India 2 Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, India Email address * Corresponding author Citation Samaresh Ghosh, Mridula Acharyya, Subal Chandra Manna. Novolac Resin-Based Networks for Adsorptive Removal of Azo Dye (Orange- II). American Journal of Chemistry and Application. Vol. 5, No. 3, 2018, pp. 29-34. Received: February 23, 2018; Accepted: March 21, 2018; Published: May 16, 2018 Abstract: Novolac resin-based networks 1 and 2 provide insight into the adsorptive removal of azo-dye Orange-II molecules from aqueous solution. The effects of pH and contact time were explored in this adsorption study. Favorable adsorption was observed at the pH values 2.30 and 7.20. Furthermore, the reusability of same network materials was demonstrated by the desorptive regeneration occurred at the very basic region. Keywords: Novolac-Based Network Polymers, Adsorbents, Adsorption, Azo-Dye, Orange-II 1. Introduction Azo-dye contamination of receiving water body presents a significant threat to human health and the environment. Some of the azo dyes and their degradation products may be toxic for living organisms [1-3]. Since Orange-II represents a popular model compound for many azo-dye colorarants present in the effluent water of dyeing and textile industries, the search for facile treatment methods in eliminating Orange-II (sodium 4-[(2-hydroxy-1-naphthyl)azo]benzene sulfonate) has become a very important scientific goal [4-7]. Therefore, it is of great significance to remove these organic pollutants from contaminated water prior to their discharge. Many methods including coagulation and flocculation, oxidation or ozonization, membrane-filtration processes, ion exchange, chemical precipitation, and adsorption [8-13] have been developed to remove these pollutants from wastewater or aqueous solutions. Adsorption-based process [14-19] has appeared a very effective method because of its low cost simplified design and operation. Polymeric sorbents [20-26] have received particular attention due to their wide variations in porosity and surface chemistry, ease of operation and recovery. Phenolic resins are of particular interest in the design of polymeric sorbent materials due to their versatile three dimensional structures, which can be modified to capture dye pollutants. In this context, there is a longstanding interest in the design of novolac type phenolic resin-based network polymers 1 and 2 (Figure 1) for the adsorptive removal of azo dye molecules [23, 24]. To continue interest in this research direction, this paper reports the adsorptive removal of azo dye Orange-II by these macromolecular network materials. Figure 1. Novolac resin-based networks 1 and 2.