“…Pectin is abundantly present in waste streams of the citrus, apple, and sugar beet processing industries. Therefore valorizing these waste streams (for example, citrus peel, or sugar beet pulp), to obtain pectin for use as a biosorbent is an interesting area to explore (Christiaens et al, 2015a;Naqash, Masoodi, Rather, Wani, & Gani, 2017). Citrus peel was found to be the most effective in binding Cd 2+ (Schiewer & Patil, 2008), but also pectin modified with adipic acid (Li, Yang, Zhao, & Xu, 2007) or sugar beet pulp (Castro, Blázquez, González, Muñoz, & Ballester, 2017) were shown to effectively adsorb metal ions.…”