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›› 2016, Vol. 33 ›› Issue (6): 748-752.DOI: 10.7523/j.issn.2095-6134.2016.06.005

• Research Articles • Previous Articles     Next Articles

Aqueous reduction of Au3+ by natural organic matter under light-limited irradiation

LIU Zilu, MA Jiahai   

  1. School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-03-08 Online:2016-11-15
  • Supported by:

    Supported by the National Natural Science Foundation of China(21377126,41573115)

Abstract:

In this study, we find that one standard natural organic matter (NOM) called Suwannee River humic acid (SRHA) reduces Au3+ to Au nanoparticles under short-time simulated sunlight irradiation or in full-course darkness. The results suggest that the reduction of metal ions by the active NOM occurs widely, even in special aquatic environments that lack sunlight exposure, such as underground and cavern water. Moreover, analogous experiments covering other two kinds of NOMs, Pony Lake fulvic acid (PLFA) and Aldrich humic acid (AHA), demonstrate that NOMs behave differently in reduction of Au3+ with limited irradiation.

Key words: natural organic matter, Au3+, Au nanoparticle

CLC Number: