Dear Colleagues,

Engineered nanomaterials (ENPs)-based environmental technologies have become increasingly competitive and, thus, important for the remediation of impaired environmental systems, namely, water, soil, and air. There have been many advances on the principles and applications of photocatalytic degradation of hazardous organic chemicals using nan-sized TiO₂ since the early 1970s. Catalysts and electrodes made of nano-size particles have been around, and applied, in many industrial fields’ centuries before instruments were available for their direct observation. Environmental applications of nanomaterials and technologies, although potentially promising and feasible, generally fall behind other industries, mostly due to social–political and legal issues.

In order to achieve sustainability within the framework of environment and energy nexus, nanomaterials and nanotechnology will play the foremost role. The millennium agenda of global sustainability has arrived with excellent opportunities for the deployment and its ultimate implementation of nanotechnologies for environmental remediation. Nanomaterials require small amounts of raw materials, have unique and much enhanced surface reactivities and selectivities, and robust in-system design and operations. These are excellent attributes, and opportunities as well, for environmental remediation nanotechnologies.

Several thematic topics are of interest to this Special Issue: 1) past experiences on the design and operation of nanotechnology for the remediation of impaired water, polluted air, contaminated soil and sediment; 2) current advances on the developments and implementation of environmental nanotechnology in broader definitions; 3) new concepts and strategies on the design of “smart” nanomaterials and systems integration achieving high efficiency and high selectivity, in the separation and transformation of ions, molecules, and emerging contaminants from impacted natural and built environmental systems; 4) environmental impacts of nanomaterials and nanotechnology; and 5) devices applying nanomaterials and principles of nanotechnology for environmental sensing and monitoring. Specifically, the Special Issue welcomes manuscripts covering the following subjects: Processes and engineering applications of nanotechnologies for the treatment of impaired water, polluted air, contaminated soils and sediments; electrochemical processes applying nanocatalytic electrode materials; heterogeneous nanophotocatalysis; multiple-functional nanoadsorbents and nanocatalysts; photo-electrochemical processes; nanomembranes; environmental nanosensors; environmental implications; and impacts of nanaomaterials.

Prof. Dr. Chin-pao (C. P.) Huang
Prof. Dr. Ruey-An Doong
Prof. Dr. Cheng-Di Dong
Prof. Dr. Huijuan Liu
Prof. Dr. Bingcai Pan
Guest Editors

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• high-performing electrode materials
• mutli-functional nanocomposite
• electrochemical separation/purification
• photoelectrochemical purification/separation
• adsorption purification/separation
• nanomembrane purification/separation
• separation and purification
• biosensors and nanosensing
• ecological nanotoxicity
• environmental remediation