Chemical Properties: The chemical composition of the biochar can influence its adsorption capacity. Some biochars may have functional groups on their surface that enhance their ability to adsorb certain pollutants. Puffed rice biochar may lack these functional groups or have an unfavorable chemical composition for dye removal.

Pre-treatment: The preparation and pre-treatment of biochar can also impact its adsorption capabilities. Puffed rice biochar might not have undergone suitable activation or modification processes to enhance its adsorption properties.

Please note that the specific features and models of combine harvesters may vary by manufacturer and region. Advancements in combine harvester technology continue to be made, with a focus on increasing efficiency, reducing environmental impact, and improving operator comfort and ease of use. For the latest information on modern rice combine harvesters, it's recommended to consult manufacturers or agricultural equipment dealers in your area.