The emerging concern of heavy metal pollution derived from storm water runoff has triggered a demand for effective heavy metal adsorbents. A novel adsorption material based on waste glass and cement blocks found in construction waste was developed, which showed the feasibility of its application in environmental adsorption materials. The preparation conditions of glass pumice were studied, and scanning electron microscopy, Brunauer–Emmett–Teller and Fourier transform infrared spectroscopy were used to analyze physical characteristics. The results showed that the glass pumice was prepared successfully when the ratio of glass powder/cement block/boric acid/calcium carbonate was 10:12:2.5:3 and the firing temperature at 1,000°C. Batch adsorption experiments were conducted to investigate its adsorption performance. Adsorption kinetics and adsorption isotherms were investigated to reveal the adsorption mechanisms. The results showed that the maximum adsorption capacity was 34 μg g –1 and the maximum removal efficiency reached 90% under pH 6.0, Pb 2+ 0.5 mg L –1 and temperature at 25°C, which matched well with the second-order kinetics model and the Langmuir model.
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Ba et al. (2022) studied this question.
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