Tea/Coffee\nSustainable Nanoarchitectures Purify Wastewater

Transforming spent coffee grounds\nand tea residues into\nvaluable\nhierarchical porous materials presents a sustainable solution for\nenvironmental remediation due to the low cost, extensive availability,\nand versatile functionalized interface. Here, we systematically investigated\ntea polyphenol-mediated morphological transformation of spent coffee\ngrounds to the synthesis of three-dimensional (3D) mesoporous metal–organic\nframework (MOF)-derived nanoarchitectured carbon composites. We adopted\nthe sustainable cost-effective tea–coffee derivative to remove\ntypical marine micropollutants, such as antibiotic wastewater, radioactive\npollutants, and microplastics. This innovative adsorbent shows remarkable\nefficiency in antibiotic adsorption, achieving up to 99.62% removal\nof tetracycline (TC), with an impressive maximum adsorption capacity\nof 373.1 mg/g. It also demonstrates a remarkable ability to remove\nmarine microplastics and radioactive pollutants with immediate nuclear\nthreats and global sanitation and health crisis posed by Fukushima\nnuclear waste toward the world. The innovative strategy of treating\nwaste with waste highlights economic potential in wastewater treatment.