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Related Experiment Video

Updated: Jul 13, 2026

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

Phosphate removal from solution using steel slag through magnetic separation.

Jibing Xiong¹, Zhenli He, Qaisar Mahmood

¹MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Natural Resources and Environmental Sciences, Zhejiang University, Huajiachi Campus, Hangzhou 310029, China.

Journal of Hazardous Materials

|August 21, 2007

Summary

Steel slag effectively removes phosphate from water. This low-cost material shows high adsorption capacity, making it a promising solution for wastewater treatment and phosphate remediation.

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Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Published on: May 18, 2018

Area of Science:

Environmental Chemistry
Materials Science

Background:

Phosphate pollution poses a significant threat to aquatic ecosystems.
Effective and economical methods for phosphate removal are crucial for wastewater treatment.

Purpose of the Study:

To investigate the efficacy of steel slag as an adsorbent for phosphate removal from aqueous solutions.
To determine the optimal conditions and adsorption mechanisms for phosphate removal using steel slag.

Main Methods:

Batch experiments were conducted to evaluate the influence of adsorbent dose, pH, and temperature.
Phosphate removal was analyzed using adsorption isotherms (Langmuir and Freundlich).
Magnetic separation was employed for steel slag recovery.

Main Results:

Phosphate removal efficiency increased with temperature and adsorbent dose, peaking at pH 5.5.
The maximum adsorption capacity of steel slag was determined to be 5.3 mg P/g.
Removal rates for total phosphorus (TP) and dissolved phosphorus (DP) from secondary effluents were 62-79% and 71-82%, respectively.

Conclusions:

Steel slag is a cost-effective and efficient adsorbent for phosphate removal.
The primary mechanism for phosphate removal by steel slag is ion exchange.
Steel slag demonstrates significant potential for application in industrial and municipal wastewater treatment.