Journal Article

Solvothermal synthesis of 3D rod-shaped Ti/Al/Cr nano-oxide for photodegradation of wastewater micropollutants under sunlight: a green way to achieve SDG:6

Mandal, Debpriya, Mukherjee, Arnab, Dhak, Prasanta, Dhak, Debasis

2024

Overview

Waterbodies are day-by-day polluted by the various colored micropollutants, e.g., azo dyes enriched (carcinogenic, non-biodegradable) colored wastewater from textile industries. Water pollution has become a serious global issue as ~ 25% of health diseases are prompted by pollution as reported by WHO. Around 1 billion people will face water scarcity by 2025 and this water crisis is also a prime focus to the UNs’ sustainable development goal 6 (SDG6: clean water and sanitation). To prevent the water pollution caused by micropollutants, a mesoporous, 3D rod-like nano-oxide Ti/Al/Cr (abbreviated as TAC) has been synthesized via the solvothermal method. TAC degraded all classes of azo dyes (mono, di, tri, etc.) with > 90% efficiency under renewable energy source solar irradiation within the pH range 2–11. The detailed study was done on the photodegradation of carcinogenic di-azo dye Congo red (CR) which is banned in many countries. TAC showed 90.64 ± 2% degradation efficiency for CR at pH 7. The proposed photodegradation mechanism of CR was confirmed by the high-resolution liquid chromatography–mass spectroscopy (HRLC-MS) analysis obeying the Pirkanniemi path. The photodegradation obeyed the pseudo-1st-order kinetics and was reusable up to successive 5 cycles which can be an efficient tool to meet the UNs’ SDG:6.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Aluminum / Aquatic Pollution / Atmospheric Protection/Air Quality Control/Air Pollution / Azo dyes / Biodegradation / carcinogenicity / Carcinogens / Concept Renewal and Green Development / Dyes / Earth and Environmental Science / Ecotoxicology / Environment / Environmental Chemistry / Environmental Health / fabrics / Irradiation / Liquid chromatography / Mass spectroscopy / Micropollutants / Oxides - chemistry / people / Photodegradation / Photolysis / pollutants / porous media / Renewable energy sources / Sanitation / Solar energy / Solar radiation / spectroscopy / Sunlight / surface water / Sustainable development / Textile industry wastewaters / Titanium / Titanium - chemistry / Waste Disposal, Fluid - methods / Waste Water Technology / Wastewater / Wastewater - chemistry / Water crises / Water Management / Water Pollutants, Chemical - chemistry / Water pollution / Water Pollution Control / Water pollution prevention / Water scarcity / water shortages