Recent advances and novel concepts in environmental technologies.

This special issue contains 17 articles that are disseminating the recent advances and novel concepts in environmental technologies. They are selected from the presentations made at the 11th annual international conference on the "Challenges in Environmental Science and Engineering," CESE-2018 that was held in Bangkok, Thailand from the 4th to the 8th of November 2018. There were 274 delegates from 18 countries and regions participated in CESE-2018. The conference covered 8 themes, namely, (i) the application of Membrane Technology & Nano-Technology, (ii) Water & Wastewater: Pollution Prevention & Treatment, (iii) Resources & Wastes: Management and Recovery of Materials and Energy, (iv) Air Pollution: Prevention and Treatment, (v) Sustainable Catchments & Renewable Energy, (vi) Cleaner Production and Emerging Sustainable Practices, (vii) Appropriate Technology for Sustainability & Climate Change Adaptation/Mitigation, and (viii) Soil Sustainability and Contaminated Soils and Sediments. This special issue covers various aspects of adsorption, heavy metals, application of membranes, removal of pollutants, water quality, and treatment as well as climate change and education. Three articles are dedicated to adsorption. One article discusses the adsorption of copper from aqueous media using chitosan-coated bentonite, chitosan-coated sand, and Responsible editor: Philippe Garrigues * Veeriah Jegatheesan