ABSTRACT One Mn/Al‐loaded magnetic Mn‐Al@Fe 3 O 4 composite (Mn‐Al@Fe 3 O 4 ) was synthesized via a surface loading method, and its efficiency as an adsorbent was assessed toward the removal of fluorides and phosphate. This study systematically analyzed how parameters such as solution pH, adsorption duration, and initial solute concentration affect the adsorption performance of the magnetic composite material. The experimental results obtained via the batch adsorption method indicate that Mn‐Al@Fe 3 O 4 showed maximum adsorption capacities of 23.3 mg·g −1 for fluoride and 16.9 mg·g −1 for phosphate at 303 K, respectively. The adsorption of these pollutants onto Mn‐Al@Fe 3 O 4 both follows the pseudo–second–order kinetic model, suggesting the dependence of the adsorption process on the interaction between the active sites of Mn‐Al@Fe 3 O 4 and the pollutants. Fitted adsorption models suggested Temkin and Redlich–Peterson models to be the most suitable, further corroborating the assertion above. Additionally, Mn‐Al@Fe 3 O 4 showed an appreciable reusable efficiency toward the studied pollutants when regenerated with 0.1 mol·L − 1 NaOH. The characteristics of Mn‐Al@Fe 3 O 4 ‐ including its easy separability and stable performance across diverse pH conditions—highlight its potential for efficiently eliminating fluoride and phosphate from solution.
Fan et al. (Mon,) studied this question.
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