Chelating Ability and Microbial Stability of an l-Arginine-Modified Chitosan-Based Environmental Remediation Material

Zhang, Y.; Zhang, H.; Liu, Y.; Zhang, Z. L.; Ding, Changkun

doi:10.1007/s10924-017-1000-y

Cited by 23 publications

(12 citation statements)

References 40 publications

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“…FTIR spectra of HLA 10 nanomotors show both the characteristic peaks of HPAM and l -arginine (a carbonyl peak at 1660 cm −1 , and 1500–1600 cm −1 assigned as C=N bond (Supplementary Fig. 5)) 18 . The comparison of the FTIR spectra of HLA 10 nanomotors before and after reacting with H 2 O 2 show that the peak intensity at 1660 and 1380 cm −1 (assigned to the carbonyl and amide bonds, respectively) is significantly enhanced, indicating that the C=N of l -arginine in the HLA 10 nanomotors becomes C=O bond, suggesting the reaction is successful (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Bio-inspired nitric-oxide-driven nanomotor

et al. 2019

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Current chemical-fuel-driven nanomotors are driven by gas (e.g. H 2 , O 2 , NH 3 ) which only provides motion ability, and can produce waste (e.g. Mg(OH) 2 , Pt). Here, inspired by endogenous biochemical reactions in the human body involving conversion of amino acid L-arginine to nitric oxide (NO) by NO synthase (NOS) or reactive oxygen species (ROS), we report on a nanomotor made of hyperbranched polyamide/L-arginine (HLA). The nanomotor utilizes L-arginine as fuel for the production of NO both as driving force and to provide beneficial effects, including promoting endothelialisation and anticancer effects, along with other beneficial by-products. In addition, the HLA nanomotors are fluorescent and can be used to monitor the movement of nanomotors in vivo in the future. This work presents a zero-waste, self-destroyed and self-imaging nanomotor with potential biological application for the treatment of various diseases in different tissues including blood vessels and tumours.

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Section: Resultsmentioning

confidence: 99%

Bio-inspired nitric-oxide-driven nanomotor

et al. 2019

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“…(6): (6) …where q e and q t were the amounts of dyestuff adsorbed at equilibrium and at time t in mg/g, and k 1 and k 2 were rate constants in min -1 and g/mg•min, respectively [45]. Table 3 shows that that pseudo second-order model could better describe the adsorption behaviors of CS-γCD to MB, MP, and CR, and the adsorption could be regarded as a chemisorption dominant process [46]. Furthermore, the CR was found to have an increased fitting degree (R 2 ) to the pseudo first-order model, which indicated that the CS-γCD would have a more complicated adsorption behavior for CR, where the hostguest inclusion effects of γ-CD non-polar cavums to CR molecules could play a more important role compared with two other kinds of cationic dyes.…”

Section: Adsorption Isotherms and Kinetics Studiesmentioning

confidence: 99%

Preparing γ-Cyclodextrin-Immobilized Starch and the Study of its Removal Properties to Dyestuff from Wastewater

Zhang¹,

Zhang²,

Cheng³

et al. 2019

Pol. J. Environ. Stud.

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A novel natural polymeric adsorbing material γ-cyclodextrin immobilized starch (CS-γCD) was prepared by introducing host functional molecule γ-cyclodextrin (γ-CD) into starch, using epichlorohydrin (ECH) as a cross-linking agent and sodium hydroxide as a catalyst, via the aqueous-phase synthesis method. The γ-cyclodextrin content in CS-γCD was up to 8.15% determined by the bromocresol green (BCG) hyperchromic spectrophotometric method. The structures of CS-γCD were characterized by infrared spectrum (FT-IR), 13 C-nuclear magnetic resonance spectrum ( 13 C-NMR), scanning electron microscope (SEM), x-ray diffraction (XRD), and gel permeation chromatography (GPC). We investigated the adsorption performances and kinetics of CS-γCD to three different kinds of dyestuff including methylene blue (MB), methyl purple (MP), and congo red (CR). The results showed the adsorbing capacities of CS-γCD to three kinds of dyes had obviously increased compared with native starch and diatomite, and the CS-γCD was also found to have a significant advantage in adsorption of macro-molecule dye such as CR over other adsorbing materials. The adsorption behaviors of CS-γCD on the three dyestuffs could be better described by a Langmuir model (R 2 >0.99), but also had relatively high correlation to Freundlich model. The pseudo second-order model could better describe the adsorption behaviors. The CS-γCD could be enzymolysised, while its degradation rate was much lower than native starch, which indicated that CS-γCD had a relatively higher structural stability and longer service life, these characters could be beneficial for the popularization and application of CS-γCD in fields of wastewater treatment and environment remediation.

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“…25 Arg is the only amino acid containing guanidine, with the highest alkalinity among the 18 common natural amino acids, which makes Arg a highly effective natural antibacterial agent. [26][27][28][29] There have been many studies on the immobilization of Arg on natural macro-molecules for the purpose of improving their antibacterial activities. 28,30 For example, Arg-immobilized chitosan (ACS) was prepared in the presence of EDC and NHS, which exhibited improved heavy metal ion adsorption capacities and biological degradation resistance compared with St. Additionally, ACS was demonstrated to have an extended service life for the treatment of industrial wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…28,30 For example, Arg-immobilized chitosan (ACS) was prepared in the presence of EDC and NHS, which exhibited improved heavy metal ion adsorption capacities and biological degradation resistance compared with St. Additionally, ACS was demonstrated to have an extended service life for the treatment of industrial wastewater. 29 Chitosan has also been reported as an adsorbent using other methods. Ahmad et al 31 prepared a diphenylurea/chitosan hydrogel through a diazotization reaction, Manzoor et al 32 synthesized a new chitosan/carboxymethyl cellulose adsorbent using EDTA cross-linking, which could be recycled for the adsorption of Cu 2+ many times with high regenerative adsorbability.…”

Section: Introductionmentioning

confidence: 99%