The environmental degradation by anthropogenic activities has become a threat to the ecosystem and survival. The continuous release of noxious pollutants into water bodies has misbalanced the ecosystem even at the molecular level, leading to direct ill effects on flora and fauna. These pollutants are non-biodegradable, mutagenic, carcinogenic, and show bioaccumulation and biomagnification. It is immensely indispensable to remediate these pollutants from wastewater. Numerous technologies such as photocatalysis, ion exchange, electrocatalysis, osmosis, and adsorption have been employed for environmental detoxification. Adsorption is one of the most cost-effective and easiest methods to remove contaminants from the water system.

Diverse adsorbents have been researched and fabricated, including activated carbon, polymers, metal oxides, layered hydroxides, metal-organic frameworks, hydrogels, etc. Individually, these materials suffer from a few challenges. For instance, organic adsorbents such as hydrogels or polymers are sensitive to extreme environments (higher temperature and pH conditions). They demonstrate poor mechanical properties, whereas inorganic adsorbents as metal oxides easily leach into water systems in practical applications. To overcome these challenges, a new class of materials known as nanocomposites has been developed with improved properties. Nanocomposites embrace the properties of all their constituents resulting in entirely unique properties. They are highly functional, stable, selective, and reusable adsorbents. The advanced nanocomposites not only act as adsorbents but can also be used as sensors to detect trace pollutants and as filters for selective separation of heavy metals. Nanocomposites are cost-effective, easy to handle, and highly stable materials. Hence, nanotechnology is trying to shape newer nanocomposites adsorbent for environmental detoxification. Continuous reaction engineering is being performed to develop hybrid nanocomposites materials with a multi-pronged approach for the removal of large classes of pollutants to address environmental problems at a practical level.

The aim of this Special Issue is to bring together original research articles and review articles that focus on advanced nanocomposites and hybrid nanomaterials used in contaminant detection and eradication. We hope this Special Issue also highlights advancements in reaction engineering, mechanisms, and technologies within the context of nanocomposites as advanced adsorbents.

Potential topics include but are not limited to the following:

• Synthesis and characterization of nanocomposites for environmental remediation
• Advancement in novel nanocomposites for the detection and monitoring of trace pollutants
• Activated carbon-based advanced nanocomposites for the removal of noxious heavy metals
• Polymer-based nanocomposites for removal of pharmaceutical pollutants
• Mixed oxides as nanoadsorbents
• Nanocomposites membranes for detoxification of wastewaters
• Graphene-based nanocomposites for the removal of organic pollutants
• Adsorptive removal of dyes from wastewater using nanocomposites
• Magnetic nanocomposites for wastewater treatment