ABSTRACT
Nowadays, water treatment is a requirement to cover water shortage due to industrialization and urbanization. Owing to their unique physical, chemical, and structural properties, carbon nanotubes are playing a promising role in cleaning the wastewater. Carbon nanotubes provide potential solutions to environmental problems by using them as adsorbent, photocatalysts, and membranes. Adsorption is a technique where chemical interaction between the adsorbate and adsorbent play a considerable role to remove toxic contaminants from wastewaters. There are different ranges in diameters are available, such as 10–20, 20–40, and 40–60 nm for the degradation of contaminants in wastewaters. 10–20 nm diameter size showed unique results in the degradation of contaminants. Further, smooth hydrophobic walls, specially aligned atoms and the diameter of carbon nanotubes, advanced membrane technologies for water treatments are developed and are of two types as vertically aligned and mixed matrix carbon nanotube membranes. Mixed carbon nanotube membranes are preferred to use due to tremendous separation performance, high water flux, low biofouling potential in water treatments. Scientists are still searching in this field to find an efficient and cost-effective catalyst for wastewater treatments.
