Sorption characteristics and mechanisms of Pb(II) from aqueous solution by using bioflocculant MBFR10543

摘要: This paper focuses on the effectiveness of removing Pb(II) from aqueous solution using bioflocculant MBFR10543 and a series experimental parameters including dose, calcium ions concentration, pH, temperature uptake was evaluated. Meanwhile, flocculation mechanism discussed. Results have demonstrated that removal efficiency reached 94.7 % (with sorption capacity 81.2 mg · g−1) by adding in two stages, separately, 3 × 10−2 (w/w) 1.0 min’s rapid mixing (180 rpm) 4 after 2.0 slow (80 with pH value fixed at 6. process could be described Langmuir isotherms model pseudo-second-order kinetic model. The negative Gibbs free energy change indicated spontaneous nature flocculation. Fourier transform infrared spectra analysis functional groups, such as –OH, C=O, C–N, were existed molecular chains, which had strong for Pb(II). Furthermore, both charge neutralization bridging being main mechanisms involved MBFR10543.