New adsorbents for nitrate from modified ground tire rubber

“Functional upcycling” of polymer waste towards the design of new materials

“…Although the modified ground rubber in the above-cited study exhibited a relatively low adsorption capacity (∼2–3.5 mg g −1 ), the removal ability of the modified WTR is comparable to that of commercial resins. 517…”

“…For all polymers, the primary application field is adsorbents or materials for oil–water separation. The most common adsorbates include oils, metal ions, dyes, and other POPs such as humic acid, 49 phenols, 364 anions (F − and NO 3 − ), 43,517 and TC 516 (Table 10). As such, POPs are toxic chemicals that adversely affect the human health and environment on a global scale.…”

“…Moreover, rubber can be treated with Wijs' reagent for the formation of vicinal dihalogenides, followed by aminolysis using polyamines (EDA, DTA, or pentaethylenehexamine (PHA)) (Fig. 18a and Table 8(1)) 43,517 under microwave irradiation. Another example of an electrophilic reaction is sulfonation using H 2 SO 4 or a H 2 SO 4 /HNO 3 mixture (Fig.…”

“…19a and Table 8(1)). 43,517 In addition, the adsorbent can be regenerated similarly to an ionexchange resin. Although the modified ground rubber in the above-cited study exhibited a relatively low adsorption capacity (B2-3.5 mg g À1 ), the removal ability of the modified WTR is comparable to that of commercial resins.…”

Use of coal beneficiation tailings as solid sorbents in the treatment of nitrate-contaminated real wastewater

“…Many technologies have been used in water treatment, including ion exchange (Khan et al 2018(Khan et al , 2019a, reverse osmosis, reduction, precipitation, and membrane filtrations (Kolangare et al, 2018;Rungrodnimitchai and Kotatha 2019;Sheikh et al 2019;Roudbari and Rezakazemi 2018;Erkan et al 2018). Among various technologies for treatment, adsorption has been explored extensively and presents satisfactory results, especially using adsorbents of mineral origin and/or modified surface (Samatya et al 2006;Xi et al 2010;Bhatnagar and Sillanpää 2011;Zanella et al 2015;Tyagi et al 2018;Madhura et al 2018;Tara and Asiri 2020).…”