Abstract
In this paper, wool carpet dye adsorption properties of nanoporous activated carbon materials (NCMs) prepared from bamboo agro-product is reported. Bamboo cane powder was chemically activated with phosphoric acid at different temperatures (400, 500, and 600 °C) at an impregnation ratio of 1:1. We found that the specific surface area and the total pore volume of NCM increases with temperature giving the highest surface area and pore volume ca. 2130 m2·g−1 and 2.69 cc·g−1 at 600 °C. Owing to superior surface textural properties, bamboo-derived NCM showed excellent adsorption capacity for wool carpet dyes Lanasyn orange (LO) and Lanasyn gray (LG). The adsorption phenomena could be described by Langmuir/Freundlich adsorption isotherm models. The maximum adsorption capacity was ca. 2.60 × 103 and 3.04 × 103 mg·g−1 for LO and LG, respectively. The adsorption followed pseudo second order kinetics with the second order rate constant of 1.24 × 10−3 g·mg−1·min−1 (LO) and 7.69 × 10−4 g·mg−1·min−1 (LG), respectively. This study demonstrated that the high surface area NCMs prepared from agro-product can be used as efficient and cost-effective adsorbent materials for the removal of dyes from industrial effluent.
Highlights
Nanoporous carbon materials (NCMs) have received considerable attention for their potential properties of adsorption of pollutants from an aqueous phase [1,2,3,4,5]
We report the production of high surface area NCMs from low-cost agro-product bamboo cane by phosphoric activation and its wool carpet dye adsorption properties
Surface morphology and porosity of the prepared NCMs were investigated by scanning electron microscopy (SEM) and HR-transmission electron microscopy (TEM)
Summary
Nanoporous carbon materials (NCMs) have received considerable attention for their potential properties of adsorption of pollutants from an aqueous phase [1,2,3,4,5]. Despite the potential use of activated carbon in various fields, commercially available activated carbon is an expensive material for large-scale application This demonstrates the necessity of a cost-effective method of producing high surface area and large porosity NCMs. Recently, various agro-wastes and agricultural products have been explored as low-cost precursors for the production of porous carbon materials. Asia as scaffolding in construction and subsequently disposed as landfill waste This bamboo waste can be utilized as a low-cost starting precursor material for the production of high surface area NCMs for large-scale industrial application. Note that use of sustainably derived NCMs from bio-masses or agro-waste could be extended to other technological applications where more expensive carbon materials with limited availability such as graphene, carbon nanotube (CNT) and fullerenes are used for wastewater treatment In this contribution, we report the production of high surface area NCMs from low-cost agro-product bamboo cane by phosphoric activation and its wool carpet dye adsorption properties. The adsorption phenomena could be described by Langmuir and Freundlich adsorption isotherm models
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