Fig. 2: Chemical characteristics and pollutant removal capacity of the OAs.
From: Constructing (multi)functional soil using urban organic and sediment wastes
a, Individual pollutant-retention capacity (n = 3) by OAs for the four pollutants tested: heavy metals copper and zinc and biocides mecoprop and terbutryn. Error bars represent the mean ± one standard deviation. b, The aggregated pollutant-retention capacity (n = 12) of the singular and dual biochar treatments, with triangles representing heavy metals and circles representing organic pollutants. Dashed lines indicate non-significant differences between the singular biochar treatments and mixes containing 1:1 ratio of municipal compost. Error bars represent the mean ± one standard deviation. c, Results of 13C NMR spectroscopy (n = 1) displaying the relative intensities of the types of carbon bonding at chemical shifts of 0–45 ppm (alkyl C), 45–110 ppm (O/N-alkyl C), 110–160 (aryl-C) and 160–220 ppm (carboxyl-C) for the biochars and municipal compost. Figure created using BioRender.com.
