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Biochar produced from sewage sludge could provide an important alternative to waste management practices while offering an opportunity to improve soil properties and reduce the risk of contamination from direct applications of sewage sludge soil amendments. We assessed the impacts of different rates of biochar application (20, 40, 60 t ha-1) to peanuts grown in a loamy sand soil in the North China...
A common solid waste – corrugated-paper packaging boxes – was carbonized at 300, 450, and 600ºC to develop low-cost adsorbents (biochars). The resulting adsorbents were characterized and their adsorption performances were evaluated by the batch sorption of aqueous Pb(II), Zn(II), Cd(II), and methylene blue (MB). The biochar obtained at 600ºC exhibited larger specific surface area, higher mineral contents,...
The ability of purified multi-walled carbon nanotubes (MWCNTs) to adsorb diclofenac and triclosan in aqueous solutions was examined by equilibrium, kinetic, and thermodynamic parameters. The results of SEM image, BET specific surface area, XRD, TGA, and FTIR spectra indicated that the characteristics of MWCNTs were improved after purification with nitric acid. Batch experiments illustrated that the...
The potential of two Cd-hyperaccumulators, Solarium nigrum L. (SN) and Beta vulgaris L. var. cicla L. (BV), as phytoremediation plants to remove Cadmium (Cd) from contaminated water was evaluated in hydroponics. The results showed that Cd exposure induced chlorosis and inhibited biomass growth in SN. However, these symptoms did not appear in BV. In BV, the Cd concentrations increased from 14.2 to...
Antibiotic contamination of water has become a problem that cannot be ignored. However, existing water treatment technologies at home and abroad couldn’t remove the antibiotics efficiently in the water environment. Our study investigated the adsorption of ceftazidime in aqueous solutions by multiwall carbon nanotubes (MWCNTs), and examined the impact of such factors as pH value, ion strength, and...
Peanut hull powders were chemically modified using mercaptoacetic acid to develop a convenient, lowcost, and highly efficient adsorbent for the removal of Hg(II) from aqueous solutions. A pseudo-second-order rate equation fitted the kinetic data better than a pseudo-first-order rate equation did for both the raw and the mercapto-modified peanut hull powder. The equilibrium data for both the raw and...
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