Advances in Recycling & Waste Management are a peer reviewed and open access journal publishes articles in the scientific society. The journal welcomes articles in the form of original articles, review articles, case reports, and short communications etc. relevant field. You can visit our journal page. Authors may submit manuscripts and track their progress through the system, hopefully to publication. Reviewers can download manuscripts and submit their opinions to the editor.

As a result of world population growth, consumption of energy and materials is increasing, leading to environmental consequences. Some of these consequences include increased production of solid waste, increased air pollution caused by vehicles and industrial plants, contamination of surface and groundwater. Nanotechnology has the potential of improving the environment through direct application of nanomaterials for detecting, preventing, and removing pollutants and indirect application of them by using better industrial design process and production of products compatible with the environment. Nanoparticles show higher reactivity due to their small size and high surface. While this characteristic has various benefits and applications, it may have risks for the safety of employees and the environment, such as stay suspended in the air for a long time, possibility of accumulation in the environment, easy absorption, and damage to various organs of the body. This review has investigated the applications of nanotechnology in waste management, controlling and reducing air pollution, water treatment, and nanomaterials safety.

Nanotechnology has been considered as an applied technology in various areas in recent decades. Nanotechnology has been developed by a convergence of various sciences, providing the way to work at the atomic level and to create new structures. Nanotechnology includes the production of nanosized materials and devices and controlling them in order to use their unique characteristics. By using this definition, it is found that nanotechnology has numerous applications in various areas of life sciences, engineering, and medicine . One of the areas where nanotechnology can be used is the environment . The best strategies for the health of environment like human health involves three forms of prevention, care, and treatment .so that before a big risk we should take care of the environment carefully and take deliberate measures to deal with it. Nanosensors will allow us to detect and to follow the effects of human activities on the environment accurately and quickly. Finally, when a risk occurred more than its usual level, nanotechnology solutions can be used to reduce environmental damage.

 Nanotechnology and Waste Management Solid waste materials refer to materials produced by human activities to satisfy his needs and entered the environment. Cause of the increasing population, and changes in people's lifestyles, the production of these materials is one of the environmental threats at the current time. Various types of dangerous organic and inorganic pollutants are entered into the water, soil, and air by industrial and urban waste. It is impossible to remove these pollutants simply by existing technologies. Therefore, employing modern technologies such as nanotechnology could have an important role in solving this problem. Some of the nanomaterials used widely in waste management include nanofilters, nanosensors, nanophotocatalysts, and nanoparticles

Toxic and nonbiodegradable materials (arsenic, xenobiotic organic compounds, ammonia, inorganic macro components, heavy metals, etc.) in wastes and their leachate have caused that common biological and physicochemical methods cannot eliminate them at environmental standards. Therefore, the use of pretreatment, posttreatment, and modern technologies is considered in removing contaminants from the environment. Nanofiltration has been considered in waste treatment without any need for chemicals that produced waste is concentrated and intensive, reducing its transportation and disposal cost. Applying nanofilters can remove 60 to 70% of COD and 50% of ammonium in the leachate. Nanofilters can be used to remove a wide range of pollutants such as anions and cations, arsenic, uranium, chromium, and pathogens from the wastewater. Using nanofiltration technology requires controlling the amount of deposits on the membrane of filtration. One simple solution to solve the problem of befouling is cleaning or replacement of membrane that is expensive and costly. The convenient method is to use some compounds such as fullerenes that can prevent biological fouling. Bacteria and other microorganisms can also attach to each other and accumulate on the filtering membrane and inside the pipes. Gradually, bacteria and other microorganisms absorb other organic materials and create an organic film that can block the membranes. Fullerenes can also be useful by preventing the breathing of bacteria as membrane antifouling agents. Fullerenes, as clot-busting drugs, can prevent clogging of pipes and filtrating membrane. Coating pipes and membranes with these nanoparticles can be used as a suitable strategy to prevent biological fouling of them

Porous nanocatalysts can be used to convert the wastes into ethanol. For this purpose, the gasification process is used, in which carbon compounds are converted into syngas under high pressure and temperature in a controlled environment. Syngas is converted to ethanol at the presence of porous nanocatalysts. Syngas is mainly composed of carbon monoxide, hydrogen, lower amounts of carbon dioxide, and methane. Carbon monoxide molecules of syngas are producers of ethanol. Improving the absorption of these molecules by nanocatalysts, suitable conditions are provided to ethanol formation.