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- W3007279759 abstract "Fly ash is one of the largest solid waste and causes serious environment problems. Extraction of Al(OH)3 from fly ash is beneficial to environment and economy. We developed a clean electrolysis method to generate hydroxyl groups in situ to extract Al(OH)3 from fly ash leachate without adding chemicals or using expensive membranes, avoiding the introduction of new impurities, secondary pollutants generation, and membrane limitations. Batch experiments yielded porous electrolytic products with BET surface areas from 11.7610 to 25.5267 m2/g, pore volumes from 0.1935 to 0.1643 cm3/g and pore sizes from 65.7960 to 25.7434 nm. The composition of the electrolytic products was 86.43 wt% Al(OH)3, 9.00 wt% SO3, 1.67 wt% Fe(OH)3, and 0.29 wt% Ca(OH)2. The current efficiency was 90.51 % under optimized conditions of c (Al3+) = 0.1 M, t =2 h, and J = 750 A/m2. Mean particle size was from 24.1–98.1 μm. Impurities mainly affected the composition of the electrolytic products. The OH– generated by H2O reduction reacted with Al3+, Fe3+, and Ca2+ to generate a hydroxide. Fe3+ preceded Ca2+ into the hydroxide. H2 released continuously from H2O reduction, resulting in a porous hydroxide. The wastewater was reused as a leaching reagent to promote zero-pollution discharge." @default.
- W3007279759 created "2020-03-06" @default.
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- W3007279759 date "2020-07-01" @default.
- W3007279759 modified "2023-10-15" @default.
- W3007279759 title "Clean production of porous-Al(OH)3 from fly ash" @default.
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- W3007279759 doi "https://doi.org/10.1016/j.jhazmat.2020.122371" @default.
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