Porous materials prepared from eco-friendly attapulgite and gallnut stabilized aqueous foam templates for high-efficient removal of organic pollutants

To date, whether it is the fabrication or adsorption process or the regeneration of adsorbent materials , cleanliness and environmental friendliness have been pursued by researchers. Herein, a novel and eco-friendly porous material was fabricated via the Pickering aqueous foam and applied to remove organic pollutants of brilliant green and chlortetracycline. The Pickering foam showed excellent stability and was synergistically stabilized by natural nanomaterials—attapulgite and botany—gallnut. The characterization result revealed that the attapulgite was modified by the organic molecular leached from the gallnut, and then adsorbed and formed a rigid shell at the water-air interface to prevent the coalescence and drainage of the bubble. The as-prepared porous adsorbent possessed excellent adsorption capacities of 939.83 and 465.85 mg/g for brilliant green and chlortetracycline and could be utilized cyclically at least 10 times by the carbonization regeneration at 400 °C under N 2 atmosphere. Overall, this work provided a sustainable and eco-friendly approach to fabricate porous material, and the material might have huge potential in practical applications as it has the excellent adsorption performance and the reusability .