Mechanism and Kinetics of Low Concentration Total Phosphorus and Reactive Phosphate Recovery from Aquaculture Wastewater via Calcined Eggshells

Tan, Sin-Ying; Sethupathi, Sumathi; Leong, Kah-Hon; Ahmad, Tanveer

doi:10.1007/s11270-022-05905-1

Cited by 3 publications

(1 citation statement)

References 55 publications

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“…Moreover, removing pollutants from water has been an extremely challenging task, and many research endeavors have focused on at least two formulations, each with advantages and disadvantages 21 . In addition, novel studies in the chemical adsorption field have also included (1) the conversion of titanium gypsum (TiG) into an efficient adsorbent for phosphate recovery 22 ; (2) phenolic compounds—tannins for precipitation of proteins as sludge conditioning 23 ; (3) industrial red mud particle waste used to adsorb Pb 2+ , CD 2+ , and Cu 2+ 24 ; (4) C 2 N and g-C 3 N 4 to separate nitrate and nitrite contaminants from aqueous solutions 25 ; (5) ultrasound combined with seed material facilitates phosphorus recovery from swine wastewater by sulforaphane crystallization 26 ; (6) use calcined eggshells to remove phosphate, phosphorus, cadmium, and dyes from aqueous solution 14 , 27 – 29 . Because of the limited amount of freshwater, the severe effects of industrial pollution, and the increasingly stringent regulations in various countries, water resource management and improvement have become vital to enterprises and scientists 5 , 21 , 30 .…”

Section: Introductionmentioning

confidence: 99%

On the removal efficiency of copper ions in wastewater using calcined waste eggshells as natural adsorbents

Chou

Lee

Lin

et al. 2023

Sci Rep

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Eggshells offer many advantages as adsorbents, such as affordability without special preparations other than pulverization and calcination. However, the manufacturing industry generally has a severe problem with high concentrations of heavy metals in wastewater. The purpose of this study was to use eggshell byproducts and calcined eggshell treatment for the adsorption of copper in an aqueous solution. The reaction time, metal concentration, adsorbent dose, temperature, and pH were evaluated using primary factors followed by the response surface method (RSM) to investigate the optimum conditions for eggshell byproducts and calcined eggshell adsorption treatment. The results of the one-factor-at-a-time experiment showed that the optimal adsorption rate was obtained from treatment at 24 h, 25 mg/L, 10 mg, and 25 °C. In addition, the effect of pH on the adsorption rates of eggshells and eggshells with membrane were detected at pH values of 5 and 5.9 and found to be 95.2, 90.5, and 73.3%. The reaction surface experiment showed that the best adsorption rate reached 99.3% after calcination at 900 °C for 2 h and a 20 min reaction. The results showed that eggshells, eggshell membranes, eggshells with membrane, and calcined eggshells could be applied to remove copper ions from industrial wastewater. The adsorption capacity of the calcined eggshell is better than that of the non-calcined eggshell and has good neutrality in acidic industrial wastewater. Therefore, it is convenient and practical for practical production and application. Likewise, this study conveys promising findings in the context of improving wastewater treatment based on a circular economy approach to waste reuse in the food industry and represents a valuable direction for future research.

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