Comparison between the humic acids characteristics of two andisols of different age by: FT-IR and 1H-NMR spectroscopy and py-FIMS

Abstract

Mt Etna (Italy) is the highest, active volcano in Europe. Thanks to the availability of descriptive documents and maps, it is possible to date the formation of several Etna soils.We evaluated the effect of soil formation age on the composition of the soil organic matter (SOM) and humic acids (HAs) from two Etna andisols of different ages but having the same vegetation Finally the HA extracted from old soil contains a lower quantity of aliphatic compounds and a greater quantity of carbohydrate and aromatic molecules than the HA extracted from young soil.

Fulvic acid isolation and characterisation from water of a Ramsar Lake Mansar, J&K, India

“…the region 0-4 ppm, and only one peak of low intensity in the region 6-9 ppm depicts the predominance of aliphatic groups over aromatic groups in the structure of the isolated fraction. The present finding is in conformity toWilson (1981), Stuermer and Payne (1976),Ruggiero et al (1979), Hatcher et al (1981,Tegelaar et al (1989),Kim et al (2006),Baglieri et al (2012) andSantos et al (2012) according to whom aliphatic groups are the main constituents of aquatic humic substances.…”

Soil Chemical Insights Provided through Vibrational Spectroscopy

“…Mass spectrometry methods are also common (e.g. Baglieri et al, 2012), and photochemical characterization has been suggested as an additional spectroscopic measurement (UygunerDemirel and Bekbolet, 2011).…”