• Version
• Download 15
• File Size 562.87 KB
• File Count 1
• Create Date 12 March 2026
• Last Updated 12 March 2026

Advanced Materials and Emerging Technologies for Heavy Metal Removal from Wastewater: Mechanisms, Performance Evaluation, Sustainability, and Future Perspectives

Khilari Kishor Annasaheb

Department of Chemistry, Art's Science and Commerce College, Rahuri, Ahilyanagar, Maharashtra, India

Corresponding author: kishorkhilari2@gmail.com

Abstract - The contamination of wastewater by heavy metals has been become a very serious global environmental problem, mainly due to rapid industrialization, fast urban expansion, and more intensive agricultural practice. These persistent and non‑biodegradable metals, such as lead (Pb), cadmium (Cd), chromium (Cr), mercury (Hg), arsenic (As), and nickel (Ni), are easily to bioaccumulate and biomagnify, causing high risk to both ecological systems and human healths. Their complex physicochemical property, speciation behavior and mobility in aquatic system makes the removal process more complicated, especially under different pH and redox condition and also in present of many competing ions. Conventional treatment technologies like chemical precipitation, ion exchange, membrane filtration, and electrochemical method are widely using; however, they are facing many limitations, for example producing too much sludge, having very high operation cost, serious problem of membrane fouling, and low efficiency when heavy metal exist in trace concentration. All of this is showing the needs for developing more advanced solutions.

In the last years, more attentions was focused on nanomaterials, bio‑derived adsorbent and hybrid intelligent system because of their higher surface areas, better selectivity and possibility of regeneration. Metal oxide nanoparticle, magnetic nanocomposite, biochar‑based material and functionalized biopolymer have been show superior adsorption capacity and removal efficiency for many type of heavy metals. New emerging technologies, such as photocatalysis, electrocoagulation, microbial fuel cell, membrane bioreactor and AI‑assisted optimization, are also improving treatment performance and overall sustainability. Mechanistic understandings by adsorption isotherm, kinetic model and thermodynamic evaluation is very important for optimize system design and for scaling‑up from lab to real application.

Even though a lot of progress has been done, many challenge are remain, especially about validation in real wastewater, removal of many metals at the same time, long‑term stability of material, toxicity assessment of nanomaterials, and pilot‑scale application in industry. Future perspective is pointing to the development of smart multifunctional material, better integration into circular economy concept, strategy for resource recovery, adoption of Industry 4.0 technology, and stronger regulatory framework, which together will promoting more sustainable and cost‑effective heavy metal remediation system soon.

Keywords: Heavy metal removal; Wastewater treatment; Nanomaterials; Bio adsorbents; Magnetic nanocomposites; Adsorption mechanisms; Photocatalysis; Electrocoagulation; Artificial intelligence optimization; Sustainability.