Biological self-protection inspired engineering of nanomaterials to construct a robust bio-nano system for environmental applications

被引：2

作者：

Xu, Nuo ^{[1
]}

Zhang, Xin ^{[1
]}

Guo, Pu-Can ^{[1
]}

Xie, Dong-Hua ^{[1
]}

Sheng, Guo-Ping ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Environm Sci & Engn, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Peoples R China

来源：

SCIENCE ADVANCES | 2024年 / 10卷 / 38期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

EXTRACELLULAR POLYMERIC SUBSTANCES; ACTIVATED-SLUDGE; MICROORGANISMS; NANOPARTICLES; SHEWANELLA; MECHANISMS; TOXICITY; BACTERIA; BEHAVIOR; ROLES;

D O I：

10.1126/sciadv.adp2179

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Nanomaterials can empower microbial-based chemical production or pollutant removal, e.g., nano zero-valent iron (nZVI) as an electron source to enhance microbial reducing pollutants. Constructing bio-nano interfaces is critical for bio-nano system operation, but low interfacial compatibility due to nanotoxicity challenges the system performance. Inspired by microorganisms' resistance to nanotoxicity by secreting extracellular polymeric substances (EPS), which can act as electron shuttling media, we design a highly compatible bio-nano interface by modifying nZVI with EPS, markedly improving the performance of a bio-nano system consisting of nZVI and bacteria. EPS modification reduced membrane damage and oxidative stress induced by nZVI. Moreover, EPS alleviated nZVI agglomeration and probably reduced bacterial rejection of nZVI by wrapping camouflage, contributing to the bio-nano interface formation, thereby facilitating nZVI to provide electrons for bacterial reducing pollutant via membrane-anchoring cytochrome c. This work provides a strategy for designing a highly biocompatible interface to construct robust and efficient bio-nano systems for environmental implication.

引用

页数：12