Advancement in recycling waste tire activated carbon to potential adsorbents

Abstract

Waste tires have been identified as one of the contributors to environmental problems and the issue of inadequate landfill spaces. The lack of consistent and systematic approaches such as specific regulations/laws or mechanisms of waste management to waste tires, limited application of technology for recycling waste tires and lack of awareness on the impacts of waste tires problem, make waste tires a source of environmental pollution. Various researches have been conducted on recycling waste tires into polymer bends, and materials to harden concretes, fuels and adsorbent. Researchers suggested that pyrolysis is the current trend of recycling waste tire to harvest the saleable pyrolysis oil and the recycled carbon black. Therefore, this review attempts to compile relevant knowledge about the potential of adsorbent derived from waste tires to be applied in the removal of various types of pollutants like heavy metals, organic pollutants, dye and air/gaseous pollutant. Studies were carried out on revealing the properties and the characteristics of activated carbon derived from waste tire as effective adsorbent which influence the application performance at liquid or gas phase. In addition, the challenges in the production of activated carbon derived from waste tire were discussed.

Synthesis Optimization of Activated Carbon Driven from Scrap Tire for Adsorbent Yield and Methylene Blue Removal under Response Surface Methodology

“…is indicates that the surface area of optimized STAC increased due to the demineralization process [39]. A higher surface area value of 493 m 2 /g was reported by Ali et al [24] for activated carbon derived from scrap tires.…”

“…Around 1.5 billion scrap tires per year are disposed of in the environment [23]. According to Ali et al [24], in the coming years, it is expected that 20 million additional scrap tires will be disposed of per year. Big cities are the main disposal sites for scrap tires [2].…”

“…e release of chemicals into the atmosphere is the main health concern that results from combustion [30]. When they are dumped in landfills, they can also cause a negative impact on hygiene by being a breeding ground for mosquitoes and insects [24]. Due to the leaching of trace metals, sulfur, and zinc, scrap tires can also contaminate the soil [31].…”

“…e three valuable products of waste tires that are processed through pyrolysis are pyro-oil, pyrogas, and pyro-char [35]. Due to its high carbon content, surface area, and porosity, pyro-char (activated carbon derived from the waste tire) can be used as an adsorbent for removing different pollutants from wastewater [24,[36][37][38].…”

“…Increasing the surface area of the activated carbon, which is derived from scrap tires, is the major problem that is faced during the preparation process [24]. Demineralization enhances the adsorption capacity of the adsorbent by removing inorganic minerals from the given adsorbent through a process called leaching [39].…”