ArticleTurkish journal of chemistry2025
Synthesis of low pH stable, highly photocatalytic alginate hydrogels for methylene blue removal from wastewater.
Article in Turkish journal of chemistry, 2025. 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
Chemical compounds in wastewater, including dye molecules, have been identified as significant concerns for environmental integrity and human health. In this study, adsorbent materials were synthesized from biodegradable polymers to remove methylene blue (MB) from wastewater. Calcium alginate hydrogels were produced and coated with chitosan to enhance their pH stability. Furthermore, the calcium alginate gels were doped with silver nanoparticles to improve their photocatalytic properties, promoting MB degradation and enabling gel reuse. The adsorption behavior of the gels was comprehensively examined under dark conditions, considering factors such as time, solid-to-liquid ratio, temperature, and pollutant concentration, all of which significantly impact the adsorption process. The wastewater, containing 100 ppm of MB, was subjected to a cleaning process that resulted in a reduction of the initial concentration by over 95%. Adsorption kinetics, thermodynamic constants, and adsorption isotherms were studied to understand the underlying mechanisms better. It was observed that the adsorption kinetics were compatible with pseudo-second-order with R
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