Removal of methylene blue dye from aqueous solutions by a new wood/plastic composite based on HDPE and wood particles

Document Type : Original research


1 Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran


In the present work, the ability of wood-plastic composite containing high density polyethylene and wood powder as a recycled material to remove methylene blue cation pigment was studied. The effect of some important parameters such as pH, adsorbent amount and contact time was investigated. Adsorption efficiencies for methylene blue were maximized at alkaline pH. Adsorption capacity increased with increasing adsorbent amount and contact time. The value of R2 in Langmuir model was equal to 1 and the separation factor for 0.5 and 1 g of adsorbent was 0.09 and 0.1, respectively. Given that the methylene blue adsorption data were more consistent with the Langmuir isotherm model, it can be stated that the wood-plastic composite probably has uniform adsorption surfaces and the adsorption process occurred in a homogeneous system on the adsorbent surface. Based on the results of this study, it was observed that this composite is a suitable adsorbent for removing methylene blue from aqueous solutions and used as a purifying agent in the decolorization of effluents containing pigments. This adsorbent is recyclable and cost-effective for dye removal from textile industry wastewater.


Main Subjects

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  • Receive Date: 17 July 2022
  • Revise Date: 09 September 2022
  • Accept Date: 15 October 2022
  • First Publish Date: 23 October 2022