Functional Micro-/Nanostructures in Agrofood Science: Precise Inspection, Hazard Elimination, and Potential Health Risks

Liu, Qisijing; Wang, Jing; Yao, Chi-Xuan; Yang, Lu; Zhao, Liwei; Guo, Liqiong; Liu, Jing‐Min; Wang, Shuo

doi:10.1021/acs.jafc.2c06838

Cited by 5 publications

(1 citation statement)

References 144 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the design of magnetic nanomaterials provides a simple and effective solution to overcome the bottleneck issues of traditional nanomaterial solid–liquid separation and adsorbent reuse, magnetic nanoadsorbents have been widely used in wastewater purification, especially in the adsorption and separation of heavy metal ions. − However, due to their magnetism, the phenomenon of high magnetic agglomeration between particles, typically small-sized particles, has also led to new problems such as difficulty in fully exposing effective sites and poor adsorption capacity. − Functionalizing the surface of magnetic nanoparticles to provide more adsorption sites is undoubtedly an effective way. , Typical functional nanomaterials include graphene, , polymers, , and their composites. , For example, Fe 3 O 4 -coated polypyrrole magnetic nanocomposites were prepared by in situ polymerization by Bhaumik et al, which achieved an efficient adsorption of 200 mg·L –1 Cr(VI) . The research work of Maity et al showed that the adsorption capacity of polypyrrole-based magnetic nanocomposites for Cr(VI) was up to 208.77 mg·g –1 .…”

Section: Introductionmentioning

confidence: 99%

Acoustic-Dependent Enhanced Functionalized Magnetic Nanomaterials for Purification of Chromium Containing Water

Jin,

Xu,

Yang

et al. 2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Magnetic nanomaterials typically exhibit good solid−liquid separation properties and surface modifiability, making them widely used in the separation and purification of highly toxic pollutants despite the problem of magnetic agglomeration. Herein, pure Fe 3 O 4 nanoparticles, graphene oxide (GO)-modified Fe 3 O 4 nanocomposites, polypyrrole (PPy)-modified Fe 3 O 4 nanocomposites, and GO and PPy-comodified Fe 3 O 4 nanocomposites were used as adsorbents to explore the universal and effective dispersion methods of functionalized magnetic nanoadsorbents from the perspective of acoustic parameters. System tests have shown that regardless of whether the surface of magnetic nanomaterials is modified or not, ultrasound radiation can significantly enhance the adsorption of Cr(VI) (2.1−7.3-folds). Detailed performance tests, ultrasonic parameters, and color development experiments show that the enhanced adsorption characteristics of magnetic nanomaterials with improved dispersion have a strong frequency/power dependence. Interestingly, a single modification layer, especially a combined modification layer, weakens this effect. After 5 cycles, the nanomaterial still has more than 90% adsorption efficiency, indicating that the nanoadsorbent has good cycle stability. In addition, this method exhibits excellent removal activity for Cr(VI) and other heavy metal ions (such as Pb 2+ ) in actual wastewater. This work confirms that ultrasound-assisted dispersion is a simple, efficient, and sustainable way to fully demonstrate the application characteristics of magnetic-based nanoadsorbents.

show abstract