Chaiyaraksa, Chompoonut

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Chaiyaraksa, Chompoonut
Alternative Name
Chaiyaraksa, C.
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Email
chompoonut.ch@kmitl.ac.th

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    Item type:Publication,
    Treatment of Lignin Wastewater Using Peroxydisulfate Combined with Manganese Oxide-Loaded Biochar
    (2022-09-01)
    Suwannarat, Glinsukol
    ;
    Sontabam, Kemason
    ;
    Sawangying, Soraya
    ;
    Chaiyaraksa, Chompoonut
    The pulp and paper industry wastewater discharge into public water, it will cause water pollution problems. In this research, lignin contaminated synthetic wastewater with a COD value of 2,401 mg/L, and color intensity of 5,432 ADMI was treated using 150 mM sodium peroxydisulfate in combination with MnO<inf>x</inf>-loaded biochar (MnO<inf>x</inf>-B). The MnO<inf>x</inf>-B was produced by pyrolyzing corn core at 400 °C for 4 hours without oxygen, then dipped in 40 mM manganese sulfate for 2 hours, and heated at 600°C for 30 min without oxygen. From the characterization of MnO<inf>x</inf>-B, the surface area, pore volume, pore size, and pH value at the zero-point charges of MnO<inf>x</inf>-B were 153 m<sup>2</sup>/g, 0.054 cm<sup>3</sup>/g, 1.11 nm, and 7.23, respectively. From the FTIR spectrogram, the peak assigned to Mn-O was observed. By applying 150 mM sodium peroxydisulfate and varying three parameters: MnO<inf>x</inf>-B dosage, initial wastewater pH, and reaction time, to treat lignin wastewater, the optimum experimental condition was obtained using 2 mg/L of MnO<inf>x</inf>-B, under pH of 8 for 45 min. The COD and color removal efficiencies were 73% and 90%, respectively. However, the quality of the treated wastewater did not yet pass the pulp and paper mills effluent standards of the Department of Industrial Works.