ArticleScientific reports2026
Re-engineering alum sludge using choline-glycine ionic liquid for enhanced dewatering and dye adsorption in wastewater treatment.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Large quantities of by-product alum sludge (Al-S) generated from drinking water treatment plants pose significant environmental and disposal challenges due to their high water content and large volume. This study aims to develop a sustainable conditioning and valorization strategy for Al-S using a choline-glycine ionic liquid ([Ch]-[AA]). The ionic liquid was synthesized and applied as a sludge conditioner to enhance dewatering performance. Under optimized conditions, the dewatering efficiency reached 47%, accompanied by a notable zeta potential shift, indicating partial charge neutralization and improved floc structure. To enable sludge valorization, the conditioned sludge was reused as an adsorbent, either directly or after thermal treatment. The modified materials exhibited high adsorption capacities toward Synozol KHL dyes, reaching 43.6 and 90.1 mg g⁻
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