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Use of dirty plastic waste as precursors for activated carbon production—A contribution to the circular economy
Author(s) -
Cansado Isabel Pestana da Paixão,
Mourão Paulo Alexandre Mira,
Nabais João Manuel Valente,
Tita Bárbara,
Batista Teresa,
Rocha Telmo,
Borges Cátia,
Matos Gilda
Publication year - 2022
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12762
Subject(s) - activated carbon , valorisation , chemistry , adsorption , circular economy , waste management , pulp and paper industry , nuclear chemistry , environmental science , organic chemistry , engineering , ecology , biology
The production of activated carbons (ACs) from dirty plastic wastes derived from the mechanical/biological treatment of urban solid wastes, disposable plastics and plastics used in agriculture is reported. The use of these precursors is innovative and contributes to the circular economy by the valorization of dirty plastics that are usually disposed in landfills. ACs were produced by physical activation, with air or CO 2 , and chemical activation, with KOH or K 2 CO 3 . ACs presented a BET (N 2 ) area and pore volume up to 723 m 2 /g and 0.32 cm 3 /g. Selected samples were tested for the 2,4‐dichlorophenoxyacetic acid (MCPA) and 4‐chloro‐2‐methyl‐phenoxyacetic acid (2,4‐D) removal from the liquid phase. PB‐K 2 CO 3 ‐1:1–700 presented an apparent maximum adsorption capacity of 245 and 289 mg g −1 for MCPA and 2,4‐D, respectively.