Figure 2: Distribution coefficient (K_d) for various adsorbents. The legends include adsorbent with the experimental condition (pH, contact time (CT), and V/m ratio (volume of solution/mass of adsorbent)) Source for data: Adsorbents 1-2 (Florek et al., 2014), 3-5 (Florek et al., 2015), 6-8 (Perreault et al., 2017), 9-13 (Juère et al., 2016), 14-16 (Hu et al., 2017), 17-20(pH is equilibrium pH) (Zhang et al., 2018), 21 (Artiushenko, Ávila, et al., 2020), 22-25 (Hu et al., 2019), 26-29 (Yantasee et al., 2009), 30 (Zheng et al., 2015), 31 (Amarasekara et al., 2009), 32 (Veliscek-Carolan et al., 2014), 33 (Ogata et al., 2015b), 34-36 (Giret et al., 2018), 37 (Li et al., 2018), 38 (Barrak et al., 2019), 39-40 (Lou et al., 2019), 41 (Kostenko et al., 2019).