Comparison of the structural, spectroscopic and phenanthrene binding characteristics of humic acids from soils and lake sediments

Hur, Jin; Lee, Doo-Hee; Shin, Hyun-Sang

doi:10.1016/j.orggeochem.2009.07.003

Cited by 112 publications

(55 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…ns = not significant difference in the LSD 5% Traversa et al (2014) reported that Alfisols in Italy had E4/E6 of humic acid values that ranged from 1.2 to 2.5. Hur et al (2009) reported that lake sediments had a E4/E6 ratio of humic acids that ranged from 4.01 to 4.86. Seran (2011) showed that the E4/E6 ratio in forest stands had values of 8.97 (humic acid) and 7.43 (fulvic acid).…”

Section: The E4/e6 Ratiomentioning

confidence: 99%

Humification degree and its relationship with some soil physical characteristics on robusta coffee (Coffea canephora) plantation

Putra

Soemarno

Suntari

2016

J.Degrade.Min.Land Manage.

View full text Add to dashboard Cite

Soil moisture stress in coffee plant impacts on the productivity of coffee fruit at PT.Perkebunan Nusantara XII, it is because the low ability of the soil to store water. The ability of the soil to store water can be increased by increasing the organic matter content of soil, especially humic substances. Soil organic matter plays an important role in the improvement of soil physical properties, especially the availability of soil moisture for plants. The purpose of this study was to analyze several humification parameters at four age of plantations plots of coffee and its relation to the water distribution potensial on Inceptisol PT. Perkebunan Nusantara XII Malang district. The research was conducted at PT. Perkebunan Nusantara XII were taken soil samples from 8, 28, 40, and 80 years old robusta coffee plots at 0-30 cm and 30-60 cm soil depth. The results showed that the increasing the age of the coffee plantations significantly increased the input of organic matter in the soil, with indicators of increased litter on soil surface, increased levels of soil C-organic and N-total, humic acid and soil pH. Increasing age of coffee plantations until 80 years did not affect to the value of humification parameters (C/N ratio, HA/FA ratio, E4/E6 ratio, and the humification rate (HR)). The age of coffee plantations affected the total acidity, carboxylic groups and phenolic OH, where the values tended to decrease with the older of coffee plantations in the 0-30 cm of soil layers and increased in 30-60 cm. Increasing age of coffee plantations improved the total pores and available water content in the 0-30 cm of soil layer.

show abstract

Section: The E4/e6 Ratiomentioning

confidence: 99%

Humification degree and its relationship with some soil physical characteristics on robusta coffee (Coffea canephora) plantation

Putra

Soemarno

Suntari

2016

J.Degrade.Min.Land Manage.

View full text Add to dashboard Cite

show abstract

“…The particularly popular and prevalent is the fluorescent method (Senesi et al 1991;Olk et al 2000;Bertoncini et al 2005;Gołębiowska et al 2005;Sierra et al 2005;Henderson et al 2009;Hur et al 2009;Yakimenko et al 2016;Derrien et al 2017). It provides information about the structure of HS molecules, the processes of intermolecular transport of energy and structural transformations.…”

Section: Introductionmentioning

confidence: 99%

Using delayed luminescence to characterize humic acids from lake sediments

Mielnik

Asensio

2018

J Soils Sediments

View full text Add to dashboard Cite

Purpose Using the delayed luminescence (DL) method, the photoluminescent properties of humic acids (HA) extracted from lake sediments were analyzed. Delayed luminescence is a promising technique for characterizing HA and other forms of organic matter of various origins. But information is insufficient regarding both its optimal operating conditions and also those environmental factors that control the chemical constitution of samples, which affects patterns of delayed luminescence. Materials and methods The research material was HA from lake sediments. Humic acid extractions were carried out using the method developed by the International Humic Substances Society. Studies on excitation and recording of DL intensity of HA solutions were carried out with the use of a specially designed device for continuous recording of photo-induced luminescence. The DL was excited with a monochromatic light at multiple wavelengths. Results and discussion The DL intensity depended on the wavelength of the exciting light. The highest DL intensity was obtained with excitation by blue light, the lowest DL intensity was observed with excitation by red light. Statistically significant differences among DL intensity were observed in the examined humic acids. These differences may be evidence of the variable quantitative and qualitative contributions of photoluminophores to the structure of the studied HA molecules as well as their different photochemical reactivities. For the blue-and green-excited DL intensity, statistically significant positive correlations were obtained with the elemental atomic ratio O:H and CQ coefficient. For the red-excited DL intensity, statistically significant positive correlations were obtained with the C and H content and H:C, C:N atomic ratios, while negative correlations were obtained with the free radical concentration. Conclusions Delayed luminescence depended on the wavelength of the exciting light. The DL intensity excited by blue and green light was different than the red light-excited DL intensity. The DL depended on the primary composition of sediments and the properties and structure of HA too. The grouping of HA showed that the HA formed in organic matter-poor, silicate-rich sediments had greater DL emission than did those extracted from sediments that were enriched in organic matter.

show abstract

“…Each of the regions corresponds to the integrated areas of the fluorescence intensities at the wavelength of 250-300 nm, 300-380 nm, 380-420 nm, and 420-600 nm, respectively (Hur et al 2009;Nguyen et al 2010). For discrete data, the integration was made by the summation of the fluorescence intensities at the interval of 1 nm.…”

Section: Methodsmentioning

confidence: 99%

“…The letters after the site number, S, M, and B, represent the surface layer, the middle layer, and the bottom layer, respectively b Fluorescence regions are determined based onHur et al (2009) andNguyen et al (2010) c Humification index is based onZsolnay et al (1999) DOC-normalized synchronous fluorescence spectra of water samples at the surface layers for four different sampling locations. b DOC-normalized synchronous fluorescence spectra of water samples at the surface, the middle and the bottom layers for the sampling site of S1…”

mentioning

confidence: 99%

Multivariate analysis for spatial distribution of dissolved organic matters in a large river-type dam reservoir

Nguyen

Shin

Hur

2011

Environ Monit Assess

Self Cite

View full text Add to dashboard Cite

In contrast to extensive studies of dissolved organic matters (DOM) in natural lakes, the distributions and the characteristics of DOM in artificial dam reservoirs have not been well documented despite a growing demand for the construction worldwide. For this study, spatial variations in the concentrations and the characteristics of DOM in Lake Paldang, a large river-type dam reservoir, were investigated using the concentrations, the specific UV absorbance (SUVA), the synchronous fluorescence spectra and the molecular weight (MW(w)) values. In addition, environmental factors determining the DOM spatial distribution were examined based on a principal component analysis (PCA). Variations in the DOM characteristics were greater than those for the concentrations (1.1-2.4 mg C/L). In contrast to typical lakes, vertical variations with a depth were much smaller than those observed among horizontal sampling sites within the reservoir. Irrespective of the depth, four individual sampling locations were easily distinguished by comparison of some selected DOM characteristics. The protein-like fluorescence (PLF), MW(w) and SUVA values observed at the location near the dam exceeded the corresponding values for the sampling locations near major influent rivers, suggesting that, even for the river-type dam reservoir, the downstream DOM characteristics may be governed by in-lake DOM production processes such as the release from sediments and algal activities. The results of principal component analysis (PCA) revealed that approximately 61% of the variance in DOM distribution might be explained by allochthonous/autochthonous carbon sources and predominant presence of either total nitrogen or total phosphorous over the other.

show abstract

Comparison of the structural, spectroscopic and phenanthrene binding characteristics of humic acids from soils and lake sediments

Cited by 112 publications

References 43 publications

Humification degree and its relationship with some soil physical characteristics on robusta coffee (Coffea canephora) plantation

Humification degree and its relationship with some soil physical characteristics on robusta coffee (Coffea canephora) plantation

Using delayed luminescence to characterize humic acids from lake sediments

Multivariate analysis for spatial distribution of dissolved organic matters in a large river-type dam reservoir

Contact Info

Product

Resources

About