Silk sericin microparticles as a biosorbent for hexavalent chromium ion

Kwak, Hyo Won; Kim, Yeonwoo; Yun, Na Kyong; Lee, Ki Hoon

doi:10.1007/s13233-014-2122-x

Cited by 20 publications

(10 citation statements)

References 32 publications

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“…In addition, each bivalent metal ion chelated with four -NH 2 . This illustration of sericin's charge is consistent with a study in which silk microparticles were used to adsorb Cr 6+ in aqueous solutions [93]. The study found that the net charge of sericin was positive at pH 1-2.…”

Section: Interaction Of Silk Proteins With Metal Ionssupporting

confidence: 87%

Novel Applications of Silk Proteins Based on Their Interactions with Metal Ions

Wen,

Zhang,

Chen

et al. 2023

Sustainability

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Silk secreted by Bombyx mori L. silkworm has become one of the most important biomaterials, due to its excellent biocompatibility, controllable biodegradability, superior processability, and unique mechanical properties. Silk fibroin and sericin, as the two components of silk, contain abundant polar functional groups, and thus can bind metal ions through electrostatic interaction and chelation. Based on this binding, silk proteins not only can be used to fabricate ecofriendly and efficient adsorbents to remove heavy metals from waterbodies, but also can synthesize metal nanostructures (nanoparticles or nanoclusters) to form silk/metal composites with amazing optical or electrochemical characteristics. This binding also can be manipulated to optimize silk’s performance. This review focuses on discussing and summarizing advances in the use of silk fibroin and sericin for heavy metal ion-contaminated water remediation, biosensing materials, and electrochemical materials from the perspective of the interaction between silk proteins and metal ions. The performance enhancement of silk using metal ions is also analyzed. Moreover, the silk proteins’ interactions with metal ions and related structural features that contribute to the above sustainable applications are illustrated to lay a theoretical foundation. This review will favor the expansion of the applications of silk in both the traditional textile field and new biomaterials.

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Section: Interaction Of Silk Proteins With Metal Ionssupporting

confidence: 87%

Novel Applications of Silk Proteins Based on Their Interactions with Metal Ions

Wen,

Zhang,

Chen

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…In this experiment, the pseudo‐first‐ and pseudo‐second‐order kinetic models were selected to fit the adsorption kinetic data. The pseudo‐first‐order kinetic rate equation is expressed as Equation () 63 :

\log (q_{e} - q_{t}) = \log q_{e} - k_{1} t

where

q_{e}

and

q_{t} (mg / g)

denote the adsorption capacities at equilibrium time and time

t

, respectively.

k_{1}

(1/min) refers to the rate constant.…”

Section: Resultsmentioning

confidence: 99%

“…In this experiment, the pseudo-first-and pseudo-second-order kinetic models were selected to fit the adsorption kinetic data. The pseudo-first-order kinetic rate equation is expressed as Equation (4) 63 :…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Preparation of graphene oxide/carboxymethyl chitosan/polyvinyl alcohol composite nanofiber membranes by electrospinning for heavy metal adsorption

Zheng,

Ma,

Wang

et al. 2023

J of Applied Polymer Sci

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In this paper, a graphene‐oxide/carboxymethyl‐chitosan/polyvinyl‐alcohol (GO/CMC/PVA) composite nanofiber membrane was prepared by electrospinning and cross‐linking with glutaraldehyde (GA) to improve the water resistance. The composite nanofiber membrane can be used in the field of heavy metal adsorption. The membrane was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and X‐ray diffraction. The effects of GO concentration, adsorption time, and initial concentration of heavy‐metal ion (Ni2+, Cu2+, Ag+, and Pb2+) solution on the adsorption performance of the fiber membranes were investigated. The results showed that the addition of GO can reduce the diameter of nanofibers. GO, CMC, and PVA exhibited good compatibility, and the intermolecular hydrogen bonding improved. The addition of GO also improved the crystalline properties of the composite fiber membrane. In the optimal cross‐linking condition, GA was saturated by steam cross‐linking for 6 h. The introduction of GO improved the adsorption capacity of the membrane for heavy metals in water. The utmost adsorption capacities for Ni2+, Cu2+, Ag+, and Pb2+ were 262.1, 237.9, 319.3, and 413.6 mg/g when using the cross‐linked composite fiber membranes, respectively. The results of adsorption kinetics and thermodynamics showed that the adsorption process accorded with the pseudo‐second‐order kinetic model and Langmuir–Freundlich isotherm model.

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“…8,13,18 Many studies have used silk sericin as a chelation agent to bind with metal ions. 13,19,20 For example, Koley et al reported a silk protein sericin mediated hierarchical hybrid flowers, which has excellent adsorption capability of metal ions such as Pb 2+ , Cd 2+ , and Hg 2+ . 13 However, accurately evaluate whether silk sericin is saturated or whether the membrane filter metal ions since the degree to which it binds metal ions is challenging to measure.…”

Section: Introductionmentioning

confidence: 99%