AI Article Synopsis
- Excessive iron (Fe) in coastal aquaculture water can negatively impact aquaculture development, prompting this study to explore manganese sand as a removal solution.
- The research found that over 99.7% of Fe could be removed in 120 minutes, with removal efficiency improved by lower Fe concentrations, higher temperatures, and lower pH levels.
- The results indicate that the Fe removal process follows a pseudo-first-order kinetic model and that iron oxide (FeO(OH)) primarily forms on the manganese sand's surface during the reaction.
Article Abstract
Excessive Fe in coastal aquaculture source water will seriously affect the aquaculture development. This study used manganese sand to investigate the removal potential and mechanism of Fe in coastal aquaculture source water by column experiments. The pseudo-first-order kinetic model could better describe Fe removal process with R in the range of 0.9451-0.9911. More than 99.7% of Fe could be removed within 120 min while the removal rate (k) was positively affected by low initial concentration of Fe, high temperature, and low pH. Logistic growth (S-shaped growth) model could better fit the concentration variation of Fe in the effluent of the column (R>0.99). The Fe breakthrough curve could be fitted by Bohart-Adams, Yoon-Nelson, and Thomas models (R>0.95). Smooth slices with irregular shapes existed on the surface of manganese sand after the reaction while Fe content increased significantly on the surface of manganese sand after the column experiment. Moreover, FeO (OH) was mainly formed on the surface of manganese sand after the reaction. PRACTITIONER POINTS: Fe in coastal aquaculture source water could be removed by manganese ores. The pseudo-first-order kinetic model better described the Fe removal process. FeO (OH) was mainly formed on the surface of manganese sand after the reaction.
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| http://dx.doi.org/10.1002/wer.11147 | DOI Listing |
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