Mussel‐Inspired Membrane Adsorber with Thiol Ligand for Patulin Removal: Adsorption and Regeneration Behaviors

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/mame.201800790. Membrane AdsorberMussel-inspired membrane adsorber with thiol ligand (SH-membrane adsorber) is prepared by polydopamine-assisted poly(ethylene imine) grafting and subsequent thiolation modification for efficient removal of patulin. The effects of temperature, contact time, pH, and initial patulin concentration on the adsorption capacity of the membrane adsorber are investigated. The results show that the SH-membrane adsorber is effective to remove patulin. The adsorption capacity of the membrane can reach 1245.11 µg g −1 for patulin. In static adsorption tests, the adsorption kinetic and equilibrium data are well fitted by the pseudo-second-order kinetic model and Freundlich isotherm model, respectively, meaning that the adsorption process is a multilayer chemical adsorption. The SH-membrane adsorber can be recovered by l-cysteine, and the removal efficiency of patulin is maintained at about 89.23% after eight reuse cycles, compared to the 17.33% of control membrane. These results demonstrate that the SH-membrane adsorber has a potential application for patulin removal.

Reusable thiol-modification Lactobacillus plantarum embedded in cellulose nanocrystals composite aerogel for efficient removal of Ochratoxin A in grape juice

“…At the start of adsorption, the -SH contents decreased rapidly, and the corresponding adsorption capacity increased rapidly. The -SH contents of the L-Es fluctuated after 10 min, while the adsorption capacity of the L-Es continued to increase and then reached equilibrium, which was similar to the research conclusion of Liu, Luo, et al (2019) ), Liu, Wang, et al (2019) ). When the adsorption time was 1 min, the adsorption rate of L-Es exceeded 90.0% until equilibrium (95.5%) ( Fig.…”

“…The inactivated L. plantarum powder (1.0 g) was dispersed in 20 mL n-hexane, following which 0.345 mL thioglycolic acid and 0.4 g lipase were added. The mixture was stirred at 45 °C for 8 h and then washed with deionized water and lyophilized ( Liu, Luo, Wan, Chen, & Wu, 2019 ; Liu et al, 2019 ).…”

“…The pH of grape juice was measured by a pH meter (Weifeng, China) to quantify the effective acidity in grape juice and the color of grape juice was determined using a spectrophotometer (Caipu, China). The Folin phenol method was used to determine the total phenol contents in grape juice after OTA adsorption ( Liu, Luo, et al, 2019 ; Liu, Wang, et al, 2019 ).…”

Recent development and application of membrane chromatography

“…Liu et al [ 70 ] deposited polydopamine on the surface of nylon film as an intermediate connecting layer, and covalently grafted polyethyleneimine molecules onto the polydopamine layer through Michael’s addition reaction and/or Schiff base reaction. Then, polyethyleneimine-polydopamine/nylon membrane was modified by L-cysteine, and a thiol-functionalized nylon membrane adsorber was prepared, which has good removal ability and reusability for patulin [ 70 ].…”

In Vitro and In Vivo Evaluation of Chlorogenic Acid-Encapsulated Lignin on Patulin Adsorption and Alleviation of Patulin-Induced Colonic Damage

“…Unfortunately, the application of these chemical degradation methods is limited by their low safety. Meanwhile, some inorganic adsorbents such as silica-coated iron oxide bead, molecularly imprinted polymer, activated carbon, and sulfhydryl membrane showed satisfactory adsorption capacity of PAT in aqueous solution or juice. − However, these adsorbents are not ideal solutions to PAT removal because of the obvious shortcomings like unconfirmed biocompatibility, complex preparation process, and strict requirements for certain pH value or temperature. Recently, the use of microbial bacteria in dealing with PAT contamination has become a trend.…”