Amine-Cross-Linked Lignin-Based Polymer: Modification, Characterization, and Flocculating Performance in Humic Acid Coagulation

2015 ◽  
Vol 3 (12) ◽  
pp. 3253-3261 ◽  
Author(s):  
Ruihua Li ◽  
Baoyu Gao ◽  
Shenglei Sun ◽  
Qinyan Yue ◽  
Meng Li ◽  
...  
Keyword(s):  
Humic Acid ◽  
Polymer Modification ◽  
Acid Coagulation

Effects of UV radiation on humic acid coagulation characteristics in drinking water treatment processes

2014 ◽  
Vol 256 ◽  
pp. 137-143 ◽  
Author(s):  
Wendong Wang ◽  
Wen Wang ◽  
Qinghai Fan ◽  
Yabo Wang ◽  
Zixia Qiao ◽  
...  
Keyword(s):  
Drinking Water ◽  
Humic Acid ◽  
Water Treatment ◽  
Uv Radiation ◽  
Drinking Water Treatment ◽  
Treatment Processes ◽  
Acid Coagulation

Fate of hydrolyzed Al species in humic acid coagulation

2014 ◽  
Vol 56 ◽  
pp. 314-324 ◽  
Author(s):  
Jr-Lin Lin ◽  
Chihpin Huang ◽  
Brian Dempsey ◽  
Jing-Yi Hu
Keyword(s):  
Humic Acid ◽  
Acid Coagulation

Analysis of phosphorus in two humic acid fractions of intensively cropped lowland rice soils by 31P-NMR

2000 ◽  
Vol 51 (3) ◽  
pp. 391-402 ◽  
Author(s):  
N. Mahieu ◽  
D. C. Olk ◽  
E. W. Randall
Keyword(s):  
Humic Acid ◽  
31P Nmr ◽  
Lowland Rice ◽  
Rice Soils

Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
Author(s):  
M. Takács ◽  
Gy. Füleky
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Extraction Methods ◽  
Soil Samples ◽  
Hot Water ◽  
Soil Extracts ◽  
Water Percolation ◽  
Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

Diffusion Behavior of Humic Acid in Compacted Bentonite: Effect of Ionic Strength, Dry Density and Molecular Weight of Humic Acid

2008 ◽  
Author(s):  
Kazuki Iijima ◽  
Seiichi Kurosawa ◽  
Minoru Tobita ◽  
Satoshi Kibe ◽  
Yuji Ohuchi
Keyword(s):  
Molecular Weight ◽  
Humic Acid ◽  
Ionic Strength ◽  
Dry Density ◽  
Diffusion Behavior ◽  
Compacted Bentonite

Changes in the Humic Acid–Metal Complexation Characteristics Depending on Humification Degree / Humīnskābju – Metālu Kompleksveidošanās Rakstura Izmaiņas Atkarībā No Humifikācijas Pakāpes

2012 ◽  
Vol 51 (3) ◽  
pp. 228-237
Author(s):  
D. Dudare ◽  
M. Klavins
Keyword(s):  
Humic Acid ◽  
Stability Constants ◽  
Humic Acids ◽  
Complex Stability ◽  
Peat Layer ◽  
Raised Bog ◽  
Complexing Capacity ◽  
Humification Degree ◽  
Complexation Process ◽  
Complex Stability Constants

The aim of this study is to determine the Cu(II) complexing capacity and stability constants of Cu(II) complexes of humic acids isolated from two well-characterized raised bog peat profiles in respect to the basic properties and humification characteristics of the studied peats and their humic acids. The complex stability constants significantly change within the studied bog profiles and are well correlated with the age and decomposition degree of the peat layer from which the humic acids have been isolated. Among factors that influence this complexation process, molecular mass and ability to form micellar structures (supramolecules) of humic substances are of key importance.

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