Modified Activated Carbon with Zinc Oxide Nanoparticles Produced from Used Tire for Removal of Acid Green 25 from Aqueous Solutions

Abstract

Modified activated carbon with zinc oxide nanoparticles (ZnO-n) as carbonaceous adsorbents was prepared by chemical and heat treatment of the used tire in N 2 atmosphere. Heat impregnation method was used to modifying the activated carbon with ZnO-n. In fact, Chemical activation, carbonization and heat activation of raw material were toke place in the presence of ZnO-n. The produced carbon sample before modification show specific surface area (S BET) 19.271 m 2 g-1 and pour volume (Vp) of 0.273 mL g-1 and after modification the cited parameters were 90.469 m 2 g-1 and 0.427 mL g-1 respectively. The SEM images of adsorbent materials later and after impregnation showed excellent differences that lead to increasing the sorption properties related to non-modified activated carbon adsorbent. The prepared samples were studied as adsorbents for removal acid green 25 in aqueous solutions. Amount of adsorbent, dye concentration, time of process and pH of aqueous solutions as effective parameters were optimized. Modified adsorbent showed better results than the non-modified adsorbent and sorption capacity using the Langmuir isotherm was 111.3 and 306.8 mg g-1 for acid green 25 sorption on non-modified and modified adsorbent respectively. This study showed the potential ability of used tire as abundant raw material to production of activated carbon adsorbent and modification of it with Zno-n to increase the sorption properties.

Preparation of Zinc Oxide with Core–Shell Structure and Its Application in Rubber Products

“…Currently, micron-sized ZnO is used primarily as the curing active agent in the tire industry, and only a portion of the ZnO is involved in the activation of the curing reaction. As a result, a significant amount of ZnO remains in the rubber in the form of micron-sized particles, and residual Zn is released into the environment during tire operation, contributing to environmental pollution [ 8 , 9 ]. Despite the important role of ZnO in sulfur vulcanization, its concentration in rubber compounds, especially those used in aquatic environments, must be reduced to, at least, below 2.5 wt%, because zinc oxide is classified as being toxic to aquatic life.…”

Advancement in recycling waste tire activated carbon to potential adsorbents

“…However, CB from the pyrolytic process is not recommended to reuse as a pure CB for the downstream applications including the tire manufacturing industry, as the presence of the inorganic minerals in rCB would downgrade the products superiority, which originally made of pure CB [9]. The generation of rCB as solid waste has contributed to the escalating interest of researchers in the exploration of its sorption efficiency [14,15] thermal and physiochemical properties [11,16] as well as the beneficiation. Fazara et al [11] has carried out a research and claimed that rCB has a higher specific surface area and oil adsorption number compared to the standard black.…”