Clean and safe water is a fundamental resource for human life and our ecosystem. Increasing industrialization and extensive agriculture practices have led to the creation of wastewater. Millions of people die of diseases each year from consuming contaminated water. Although various methods of wastewater treatment have been studied. Researching safe, effective, and inexpensive material that can remove contaminants from water is a science and technology topic of utmost importance to the scientific community. Carbon nanotubes (CNTs) have become the main nanomaterials for water purification. This is due to is large surface area, its high aspect ratio, and its higher chemical reactivity with low costs and energy. Green synthesis of carbon nanotubes is an emerging research trend and in green nanotechnology as this method is non-toxic, efficient and cost-effective as compared to other conventional methods. Plant-based CNTs are gaining more attention among researchers. Because Plant-based CNTs are ideal for recycling and removing heavy metals from wastewater without loss of stability and degradation of a large number of organic pollutants from wastewater and thus clean wastewater for reuse and recycling. This could solve various water quality problems around the world. This project, therefore, aims at investigating plant-based renewable precursors for CNT synthesis and to utilize the CNTs for application in water filters and wastewater treatment.