TY - JOUR
T1 - Adsorption of persistent organic pollutants (POPs) from the aqueous environment by nano-adsorbents
T2 - A review
AU - Ighalo, Joshua O.
AU - Yap, Pow Seng
AU - Iwuozor, Kingsley O.
AU - Aniagor, Chukwunonso O.
AU - Liu, Tianqi
AU - Dulta, Kanika
AU - Iwuchukwu, Felicitas U.
AU - Rangabhashiyam, Selvasembian
N1 - Funding Information:
All authors whose work are cited are hereby acknowledged.
Publisher Copyright:
© 2022 Elsevier Inc.
PY - 2022/9
Y1 - 2022/9
N2 - The intensification of urbanisation and industrial activities significantly exacerbates the distribution of toxic contaminations into the aqueous environment. Persistent organic pollutants (POPs) have received considerable attention in the past few decades because of their persistence, long-distance migration, potential bioaccumulation, latent toxicity for humans and wildlife. There is no doubt that POPs cause serious effects on the global ecosystem. Therefore, it is necessary to develop a simple, safe and sustainable approach to remove POPs from water bodies. Among other conventional techniques, the adsorption process has proven to be a more effective method for eliminating POPs and to a larger extent meet discharge regulations. Nanomaterials can effectively adsorb POPs from aqueous solutions. For most POPs, a >70% adsorptive removal efficiency was achieved. The major mechanisms for POPS uptake by nano-adsorbents includes electrostatic interaction, hydrophobic (van der Waals, π-π and electron donor-acceptor) interaction and hydrogen bonding. Nano-adsorbent can sustain a >90% POPs adsorptive removal for about 3 cycles and reuseable for up to 10 cycles. Challenges around adsorbent ecotoxicity and safe disposal were also discussed. The present review evaluated recent research outcomes on nanomaterials that are employed to remove POPs in water systems.
AB - The intensification of urbanisation and industrial activities significantly exacerbates the distribution of toxic contaminations into the aqueous environment. Persistent organic pollutants (POPs) have received considerable attention in the past few decades because of their persistence, long-distance migration, potential bioaccumulation, latent toxicity for humans and wildlife. There is no doubt that POPs cause serious effects on the global ecosystem. Therefore, it is necessary to develop a simple, safe and sustainable approach to remove POPs from water bodies. Among other conventional techniques, the adsorption process has proven to be a more effective method for eliminating POPs and to a larger extent meet discharge regulations. Nanomaterials can effectively adsorb POPs from aqueous solutions. For most POPs, a >70% adsorptive removal efficiency was achieved. The major mechanisms for POPS uptake by nano-adsorbents includes electrostatic interaction, hydrophobic (van der Waals, π-π and electron donor-acceptor) interaction and hydrogen bonding. Nano-adsorbent can sustain a >90% POPs adsorptive removal for about 3 cycles and reuseable for up to 10 cycles. Challenges around adsorbent ecotoxicity and safe disposal were also discussed. The present review evaluated recent research outcomes on nanomaterials that are employed to remove POPs in water systems.
KW - Adsorption
KW - Advantages
KW - Aqueous solution
KW - Nanomaterials
KW - Persistent organic pollutants (POPs)
UR - http://www.scopus.com/inward/record.url?scp=85127140526&partnerID=8YFLogxK
U2 - 10.1016/j.envres.2022.113123
DO - 10.1016/j.envres.2022.113123
M3 - Article
C2 - 35339467
AN - SCOPUS:85127140526
SN - 0013-9351
VL - 212
JO - Environmental Research
JF - Environmental Research
M1 - 113123
ER -