32 research outputs found
Nitrate removal and recovery by capacitive deionization (CDI)
info:eu-repo/semantics/publishe
Reactivity of novel Ceria–Perovskite composites CeO2- LaMO3 (MCu, Fe) in the catalytic wet peroxidative oxidation of the new emergent pollutant ‘Bisphenol F’: Characterization, kinetic and mechanism studies
info:eu-repo/semantics/publishe
Sulfate radical-mediated degradation and mineralization of bisphenol F in neutral medium by the novel magnetic Sr2CoFeO6 double perovskite oxide catalyzed peroxymonosulfate: Influence of co-existing chemicals and UV irradiation
info:eu-repo/semantics/publishe
Assessing the impacts of COVID-19 pandemic on the environment: A correlation or causation?
The outbreak of the COVID-19 pandemic has severely impacted human lives, human activities, and the world economy. In response to curb its spread, pandemic risk reduction measures such as mass lockdowns, extensive travel bans, and mass quarantine were imposed globally. While the imposition of these measures has negatively impacted the world economy, its impacts on the environment could be described as a gain, as the ecosystem appears to be given a rebirth. During the mass lockdown (February to April 2020), air pollution worldwide has dropped significantly precisely, with a decline in the emission and concentration of pollutants. The emission of CO2 globally declined by 8.8% during the first half of 2020. Additionally, both surface and underground water quality have been improved due to reduced industrial activities. Also, there has been an increase in carbon sink due to the decline in global bush fires. In a nutshell, the study recommends that as the world economy recovers from the impact of COVID-19, world leaders and policymakers should focus on measures that improve the environment and the ecosystem, such as the adoption of the green economy, production and use of fuel cells cars instead of gasoline cars and treating industrial effluents to WHO recommended levels before discharging them into water bodies. </p
EDTA-Cross-Linked β‑Cyclodextrin: An Environmentally Friendly Bifunctional Adsorbent for Simultaneous Adsorption of Metals and Cationic Dyes
The discharge of metals and dyes
poses a serious threat to public
health and the environment. What is worse, these two hazardous pollutants
are often found to coexist in industrial wastewaters, making the treatment
more challenging. Herein, we report an EDTA-cross-linked β-cyclodextrin
(EDTA-β-CD) bifunctional adsorbent, which was fabricated by
an easy and green approach through the polycondensation reaction of
β-cyclodextrin
with EDTA as
a cross-linker, for simultaneous adsorption of metals and dyes. In
this setting, cyclodextrin cavities are expected to capture dye molecules
through the formation of inclusion complexes and EDTA units as the
adsorption sites for metals. The adsorbent was characterized by FT-IR,
elemental analysis, SEM, EDX, ζ-potential, and TGA. In a monocomponent
system, the adsorption behaviors showed a monolayer adsorption capacity
of 1.241 and 1.106 mmol g<sup>–1</sup> for Cu(II) and Cd(II),
respectively, and a heterogeneous adsorption capacity of 0.262, 0.169,
and 0.280 mmol g<sup>–1</sup> for Methylene Blue, Safranin
O, and Crystal Violet, respectively. Interestingly, the Cu(II)–dye
binary experiments showed adsorption enhancement of Cu(II), but no
significant effect on dyes. The simultaneous adsorption mechanism
was further confirmed by FT-IR, thermodynamic study, and elemental
mapping. Overall, its facile and green fabrication, efficient sorption
performance, and excellent reusability indicate that EDTA-β-CD
has potential for practical applications in integrative and efficient
treatment of coexistenting toxic pollutants