No abstract

Nature is full of various nanomaterials and nanostructures that have inspired and helped human life and civilization in the advancement of science and technology. Among these materials are clays, which are abundantly found in rocks and earth structures. The mineral montmorillonite, known as a clay nanoparticle, is the major phase in bentonite. This nanoclay, with a thickness of about 10 angstroms, includes unique properties such as expansion, high specific surface area, electrical properties, cation exchange capacity, and has found applications in industry and research. Amongst its uses are the basis for catalytic filler reactions and its application in the removal of potentially toxic elements (PTEs) from the environment. This study includes many reports related to purified montmorillonite as a nano-adsorbent, particularly for the removal of a range of PTEs from the environment. In addition, the review considers sources, special structural features, as well 2 as the different forms of montmorillonite, whether modified or unmodified, as ecofriendly components for environmental treatment.

No abstract

The combination of increasing trade across an ever more globalized world and the ubiquity of social media access has led to unprecedented levels of wildlife exploitation. In this study, we opportunistically surveyed Instagram and Telegram from 2019 to 2020, two of Iran's most prominent social media platforms, for advertisements of illegally captured wildlife in Iran. In total we documented 305 advertisements for 63 species, including birds (29%), amphibians (27%), reptiles (26%), and mammals (17%). Trade was most active in June, which may be due to increased availability of young animals, following spring births. The majority of the species advertised for sale (65%) were classified by the IUCN Red List of Threatened Species as Least Concern, and 5% of the species we documented as being traded are Endangered. Some Endangered species advertised for sale were Caspian seal and Saker falcon. While the sale of all species is illegal in Iran, 25% of species were also listed on CITES as being prohibited for international trade. However, these domestic and international laws are not well‐enforced within Iran, in light of the scale of open trade we observed. We recommend that authorities devote more time to monitoring these online platforms, and that resources are provided to in‐country enforcement efforts during the spring and summer, the observed peak of capture and trade. We also suggest that further research be conducted into the sources of wildlife, motivations for selling wildlife, and motivations for purchasing wildlife.