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Relative assessment of activated carbon and Nano-Material based adsorbents used for obliteration of THMs precursors - regeneration and techno-economic feasibility analysis

2022; Elsevier BV; Volume: 33; Issue: 8 Linguagem: Inglês

10.1016/j.apt.2022.103700

1568-5527

Jaydev Kumar Mahato, Sunil Kumar Gupta,

Mercury impact and mitigation studies

The study presents the relative assessment of activated carbon and Nanomaterial-based adsorbents used to eradicate trihalomethane (THMs) precursors. The spatial distribution of total THMs (TTHMs) in Indian drinking water was established using Geospatial analytical tools [ArcGIS 10.3]. Principal Component Analysis (PCA) was applied to identify the significant principal THM species. The physicochemical properties of adsorbents, i.e., Acid Modified Beal Fruits Shell (AM-BFS) and Cerium Oxide Nano-Particles (CONP), were investigated by high-resolution transmission electron microscope (HRTEM) with energy dispersive X-ray (EDX), Brunauer–Emmett–Teller (BET) surface area, and zeta (ζ) potential. HRTEM study revealed that both the particles were spherical and randomly distributed. The value of average pore diameter (AM-BFS – 120.68 Å, CONP – 77.88 Å) confirmed the mesoporous nature of adsorbents. The color overlap map of EDX analysis indicated percentage progression in all the respective elements present in both materials after the adsorption process. Regeneration of adsorbents using HCl was more effective than the organic solvents (acetone, methanol) and deionized water (DW). Response surface methodology (RSM) was used to predict the regeneration ability of the exhausted adsorbents. The techno-economic feasibility analysis suggested that CONP is more effective and economical than AM-BFS for removing THMs precursors from drinking water.