Effect of high energy ball milling on organic pollutant adsorption properties of chitosan

Qiu, Wen; Vakili, Mohammadtaghi; Cagnetta, Giovanni; Huang, Jun; Yu, Gang

doi:10.1016/j.ijbiomac.2020.01.171

Cited by 41 publications

(18 citation statements)

References 45 publications

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“…Hence low concentration produced finer chitosan nanoparticles compared to those obtained from high concentration of STPP [2,8,30,31]. This result shows that the applied approach was beneficial to produce very fine nano-sized particles (3-6 nm) compared to those previously reported that range from 105-615 nm prepared by ionotropic gelation method [17,21], and from 210 nm to micro-sized particles prepared by other methods [19,20,23].…”

Section: Resultsmentioning

confidence: 55%

“…Previously, chitosan nanoparticles were synthesized using various methods, namely selfassembly [11,13], microemulsion [14], ultrafine milling [12] and ionotropic gelation [2,15,16]. The latter has been known as a simpler technique used for natural polymer nanoparticles preparation compared to others that require multi-experimental steps and use many harmful chemicals to assist preparation processes [11,17], or are hard to control the chitosan particle size [18][19][20]. In the ionotropic gelation method, chitosan nanoparticles are prepared through the formation of cross-linked bonds between amino groups and the phosphate ions (HPO -4 ) from sodium tripolyphosphate (STPP).…”

Section: Introductionmentioning

confidence: 99%

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Size-controlled chitosan nanoparticles prepared using ionotropic gelation

Budi¹,

Suliasih²,

Rahmawatia³

et al. 2020

ScienceAsia

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This work aimed at controlling the size of chitosan nanoparticles that were prepared by the ionotropic gelation method. Quantities of chitosan and sodium tripolyphosphate (STPP) were optimized to obtain a fine size and narrow size distribution of the nanoparticles. X-ray diffraction and selected area electron diffraction patterns indicated the existence of both crystalline and amorphous phases of chitosan. Particle size and size distribution were determined using transmission electron microscopy and dynamic laser scattering techniques. The size of the chitosan particles decreased with a reduction in STPP content due to a decrease in cross-link bonding and the formation of aggregate particles. Using this facile approach, the finest particles of chitosan were obtained in a range of 3-6 nm.

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Section: Resultsmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Size-controlled chitosan nanoparticles prepared using ionotropic gelation

Budi¹,

Suliasih²,

Rahmawatia³

et al. 2020

ScienceAsia

View full text Add to dashboard Cite

show abstract

“…An explanation for this behavior is the ionic state and the interactions between amine groups on AFBG and carboxylic groups on CIP. In particular, under acidic conditions the amino groups protonated (-NH 3 + ) which in turn hamper their ionic interaction with acid contaminants (i.e., containing a carboxyl group) like CIP [36][37][38]. pHzpc of AFBG and molecular structure of CIP could also describe the phenomena behind these findings.…”

Section: Effect Of Variables and Their Interactionsmentioning

confidence: 99%

Valorization of biomass into amine- functionalized bio graphene for efficient ciprofloxacin adsorption in water-modeling and optimization study

et al. 2020

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A green synthesis approach was conducted to prepare amine-functionalized bio-graphene (AFBG) as an efficient and low cost adsorbent that can be obtained from agricultural wastes. In this study, bio-graphene was successfully used to remove Ciprofloxacin (CIP) from synthetic solutions. The efficacy of adsorbent as a function of operating variables (i.e. pH, time, AFBG dose and CIP concentration) was described by a polynomial model. A optimal99.3% experimental removal was achieved by adjusting the mixing time, AFBG dose, pH and CIP concentration to 58.16, 0.99, 7.47, and 52.9, respectively. Kinetic model revealed that CIP diffusion into the internal layers of AFBG controls the rate of the process. Furthermore, the sorption process was in monolayer with a maximum monolayer capacity of 172.6 mg/g. Adsorption also found to be favored under higher CIP concentrations. The thermodynamic parameters (ΔG˚<0, ΔH˚>0, and ΔS˚>0) demonstrated that the process is endothermic and spontaneous in nature. The regeneration study showed that the AFBG could simply regenerated without significant lost in adsorption capacity.

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“…If up-scaled decomposition reactions might not work for PFAS-contaminated matrices, MC might contribute in a diverse way. In a different approach, the sorption capacity of chitosan was mechanochemically optimized and successfully applied as a sorbent for PFOS [ 134 ]. In the short term, improved PFAS adsorption techniques might be very beneficial since adsorption materials are often affordable and can be utilized quickly [ 57 , 65 ].…”

Section: Future Prospect—applicability In Remediationmentioning

confidence: 99%

Reductive Defluorination and Mechanochemical Decomposition of Per- and Polyfluoroalkyl Substances (PFASs): From Present Knowledge to Future Remediation Concepts

Roesch

Vogel

Simon

2020

IJERPH

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Over the past two decades, per- and polyfluoroalkyl substances (PFASs) have emerged as worldwide environmental contaminants, calling out for sophisticated treatment, decomposition and remediation strategies. In order to mineralize PFAS pollutants, the incineration of contaminated material is a state-of-the-art process, but more cost-effective and sustainable technologies are inevitable for the future. Within this review, various methods for the reductive defluorination of PFASs were inspected. In addition to this, the role of mechanochemistry is highlighted with regard to its major potential in reductive defluorination reactions and degradation of pollutants. In order to get a comprehensive understanding of the involved reactions, their mechanistic pathways are pointed out. Comparisons between existing PFAS decomposition reactions and reductive approaches are discussed in detail, regarding their applicability in possible remediation processes. This article provides a solid overview of the most recent research methods and offers guidelines for future research directions.

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Effect of high energy ball milling on organic pollutant adsorption properties of chitosan

Cited by 41 publications

References 45 publications

Size-controlled chitosan nanoparticles prepared using ionotropic gelation

Size-controlled chitosan nanoparticles prepared using ionotropic gelation

Valorization of biomass into amine- functionalized bio graphene for efficient ciprofloxacin adsorption in water-modeling and optimization study

Reductive Defluorination and Mechanochemical Decomposition of Per- and Polyfluoroalkyl Substances (PFASs): From Present Knowledge to Future Remediation Concepts

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