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- W1973417900 abstract "This work aimed to develop waste (i.e., sulfonated lignin) application in simulated wastewater treatment. Sulfonated lignin (LS), a byproduct of the paper industry, was intercalated into a parent host of layered double hydroxides (LDH) by swelling-restacking method. X-ray diffraction patterns of the composite confirmed that long-chain LS anions exited in the interlayer of Mg2Al-LDH in two forms: (1) a flat form with d003=0.88 nm; and (2) a vertical form with d003=9.08 nm. Results showed that the obtained Mg2Al-LS-LDH composite was highly selective and efficient for the removal of Pb(2+) and Cu(2+), especially Pb(2+), compared with the NO3-LDH precursor. The coexisting cations decreased the removal efficiency of Pb(2+) or Cu(2+) on Mg2Al-LS-LDH composite, which could be ascribed to outer-sphere sorption style, and the effect order of cations is Li(+)>Ca(2+)>K(+)>Na(+). The pseudo-second-order model appropriately described the sorption kinetics of Mg2Al-LS-LDH composite for Pb(2+) and Cu(2+). Sorption isotherms for Pb(2+) and Cu(2+) by the Mg2Al-LS-LDH composite were found to be more satisfactorily fitted by the Langmuir model than by the Freundlich one. With increased Pb(2+) or Cu(2+) concentration from 2 ppm to 200 ppm, the maximum absorption capacity of the composite toward Pb(2+) was ∼123 mg/g and that toward Cu(2+) was ∼64 mg/g. Therefore, a new, low-cost adsorbent was synthesized by utilizing the byproduct LS, which may be a potential remedy for Pb(2+) or Cu(2+) in contaminated water." @default.
- W1973417900 created "2016-06-24" @default.
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- W1973417900 date "2015-05-01" @default.
- W1973417900 modified "2023-10-15" @default.
- W1973417900 title "A new, low-cost adsorbent: Preparation, characterization, and adsorption behavior of Pb(II) and Cu(II)" @default.
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- W1973417900 doi "https://doi.org/10.1016/j.jcis.2014.12.099" @default.
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