Key Takeaways & Executive Findings
- •• The novel adsorbent achieved a maximum phosphate adsorption capacity of 45.2 mg/g, outperforming many conventional adsorbents. • Adsorption kinetics followed pseudo-second-order model, and equilibrium data fitted Langmuir isotherm, indicating monolayer chemisorption. • The adsorbent exhibited excellent regeneration capability, retaining over 80% removal efficiency after five cycles, making it cost-effective. • Thermodynamic analysis revealed spontaneous and endothermic adsorption, suggesting potential for industrial application in wastewater treatment.
Abstract
Phosphorus removal from wastewater is critical to prevent eutrophication. This study investigates the adsorption performance of a novel adsorbent, synthesized from industrial waste, for phosphate removal. The adsorbent was characterized using SEM, XRD, and FTIR. Batch experiments were conducted to evaluate the effects of pH, initial concentration, contact time, and temperature. The results showed that the adsorbent exhibited a high adsorption capacity of 45.2 mg/g at pH 6.0 and 25°C. The adsorption kinetics followed the pseudo-second-order model, and the equilibrium data fitted well to the Langmuir isotherm. Thermodynamic analysis indicated that the adsorption process was spontaneous and endothermic. The adsorbent could be regenerated using NaOH solution, maintaining over 80% removal efficiency after five cycles. The study demonstrates that the novel adsorbent is a promising, cost-effective material for phosphorus removal from wastewater.
1. Introduction
Phosphorus is an essential nutrient for all living organisms, but excessive discharge of phosphorus into water bodies leads to eutrophication, causing harmful algal blooms and deterioration of water quality. Therefore, efficient removal of phosphorus from wastewater is of great importance. Various methods have been employed for phosphorus removal, including biological treatment, chemical precipitation, and adsorption. Among these, adsorption is considered a promising technique due to its high efficiency, simplicity, and cost-effectiveness.
In recent years, many adsorbents have been developed for phosphate removal, such as activated carbon, zeolites, and metal oxides. However, these materials often suffer from low adsorption capacity, high cost, or difficulty in regeneration. Thus, there is a need for novel adsorbents that are both efficient and economical. This study focuses on the synthesis and application of a novel adsorbent derived from industrial waste, aiming to provide a sustainable solution for phosphorus removal.
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J. Zhang, L. Wang, Y. Li, H. Chen (2026). Phosphorus Removal from Wastewater Using a Novel Adsorbent: A Study on the Adsorption Capacity and Mechanism. Chinese Journal of New Drugs. https://doi.org/10.1007/s12613-024-1234-5
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Frequently Asked Questions
What is the maximum adsorption capacity of the novel adsorbent for phosphate?
The novel adsorbent exhibited a maximum phosphate adsorption capacity of 45.2 mg/g at pH 6.0 and 25°C.
What are the optimal conditions for phosphate adsorption?
The optimal conditions were found to be pH 6.0, initial phosphate concentration of 100 mg/L, contact time of 120 minutes, and temperature of 25°C.
How does the adsorption kinetics and isotherm fit?
The adsorption kinetics followed the pseudo-second-order model, and the equilibrium data fitted well to the Langmuir isotherm, indicating monolayer chemisorption.
Can the adsorbent be regenerated and reused?
Yes, the adsorbent can be regenerated using NaOH solution, and it maintained over 80% removal efficiency after five cycles, demonstrating good reusability.
What is the thermodynamic nature of the adsorption process?
Thermodynamic analysis indicated that the adsorption process was spontaneous and endothermic, as evidenced by negative Gibbs free energy and positive enthalpy changes.
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