Skip to main content
. 2017 Nov 9;2(11):7730–7738. doi: 10.1021/acsomega.7b01386

Figure 2.

Figure 2

(A) Cobalt(II) removal efficiency from environmental water samples using multifunctional magnetic biochar. (B) Comparison of the cobalt(II) removal efficiency from the water sample using magnetic NP and multifunctional magnetic biochar. (C) Plot shows that the luminescence intensity from multifunctional biochar was quenched by about 95% in the presence of cobalt(II) and is mainly due to the formation of bis and tris Co(II) complex. 305 nm excitation light was used for this experiment. (D) Plot shows that multifunctional biochar luminescence can be used for the detection of Co(II) as low as 1 ppb concentration. 305 nm excitation light was used for this experiment. (E) Plot showing the luminescence intensity with λmax at 460 nm from multifunctional biochar was quenched to less than 5% in the presence of other heavy metal ions such as Pb(II), Zn(II), Cr(III), Fe(III), Hg(II), and As(III). (F) Removal efficiency of Pb(II), Zn(II), and Cr(III) using multifunctional magnetic biochar. (G) Removal efficiency of Fe(III), Hg(II), and As(III) using multifunctional magnetic biochar.