Fractionation and characterization of humic acids from organic amended rice paddy soils

Prabhat Pramanik; Pil Joo Kim

doi:10.1016/j.scitotenv.2013.07.115

Fractionation and characterization of humic acids from organic amended rice paddy soils

Sci Total Environ. 2014 Jan 1:466-467:952-6. doi: 10.1016/j.scitotenv.2013.07.115. Epub 2013 Aug 25.

Authors

Prabhat Pramanik¹, Pil Joo Kim

Affiliation

¹ Division of Applied Life Science, Gyeongsang National University, Jinju 660-701, South Korea. Electronic address: prabhat2003@gmail.com.

PMID: 23978588
DOI: 10.1016/j.scitotenv.2013.07.115

Abstract

Humic acids (HAs), mixture of several complex-structured aromatic and aliphatic compounds, are ubiquitous in the terrestrial environment. In this study, HAs were fractionated on the basis of their polarity (degree of humification). The fractions namely 200P, 300P and 400P were comparatively more humified than fractions like 800P and 800S. The application of organic amendments significantly increased concentrations of HA fractions especially the more humified fractions in rice paddy soils. Among the different fractions, 300P fraction was the most abundant in rice paddy soils and its concentration was significantly increased due to compost application. The compounds like methyl ketone and 3-phenylprop-2-enal contributed almost 90% of 300P fraction.

Keywords: Degree of humification; FTIR; Fractionation of HA; Pyrolytic GC–MS; Rice paddy soil.

Publication types

Research Support, Non-U.S. Gov't