Abstract
Producing nanomaterials from hazardous wastes for water and soil treatment is of great concern. Here, we produced and fully characterized two novel nanomaterials from sugar beet processing (SBR)- and brick factory-residuals (BFR) and assed their ability for Cd and Cu sorption in water and reducing metal availability in a contaminated soil. The SBR removed up to 99% of Cu and 91% of Cd in water, and exhibited a significantly faster and higher sorption capacity (qmax (g kg−1) = 1111.1 for Cu and 33.3 for Cd) than BFR (qmax (g kg−1) = 33.3 for Cu and 10.0 for Cd), even at acidic pH. Soil metal availability was significantly reduced by SBR (up to 57% for Cu and 86% for Cd) and BFR (up to 36% for Cu and 68% for Cd) compared to the unamended soil. The higher removal efficacy of SBR over BFR could be attributed to its higher alkalinity (pH = 12.5), carbonate content (82%), and specific surface area, as well as the activity of hydroxyl –OH and Si-O groups. The nano-scale SBR and BFR, the former particularly, are novel, of low cost, and environmental friendly amendments that can be used for the remediation of metal-contaminated water and soil.
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•Nano-scale sugar beet (SB)- and brick factory (BF)-wastes used for metal removal.•SB removed up to 99% of Cu and 91% of Cd in water.•SB reduced availability of soil Cd up to 86% and Cu up to 57%, compared to control.•SB achieved significantly higher and faster sorption ability than BF for Cd and Cu.•SB and BF, particularly SB, is novel and low cost amendment for metal remediation.