The presence of high concentration of heavy metals and dyes in natural water supplies and industrial wastewater streams is a critical health and environmental issues due to their persistence, high toxicity and bioaccumulation through the food chain and hence in the human body. Technologies based on the utilization of magnetite nanoparticles for the removal of these toxic pollutants from wastewaters are under active development as highly effective, efficient and economically viable nanoadsorbents. This study aims to fabricate and characterize a magnetite modified carbon nanotube (CNT) nanocomposite adsorbent. The best condition for adsorbent will be optimized using response surface methodology and the best removal of heavy metals and dyes will be determined using synthesized nanocomposite adsorbent. Although there is much recent interest in the use of engineered magnetite nanoparticles in wastewater treatment, however, uncertainties over the environmental fate of the nanocomposite adsorbent need to be addressed prior to their widespread application. Therefore, the environmental (LCA) aperformance of the scale-up magnetite modified CNT nanocomposite adsorbent will be assessed. Conversion of waste to green material and fabrication of magnetite modified CNT nanocomposite adsorbent for simultaneous removal of dyes and metal ions can support waste management strategy towards circular economy and strategic decision making process for cleaner production in Malaysia.