Isolation and characterization of natural organic matter from lake water: Comparison of isolation with solid adsorption and tangential membrane filtration

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.

Download Full-text

Coagulation/flocculation/ultrafiltration for natural organic matter removal in drinking water production

Water Science & Technology Water Supply ◽

10.2166/ws.2004.0111 ◽

2004 ◽

Vol 4 (5-6) ◽

pp. 215-222 ◽

Cited By ~ 2

Author(s):

A.R. Costa ◽

M.N. de Pinho

Keyword(s):

Drinking Water ◽

Organic Matter ◽

Natural Organic Matter ◽

Membrane Fouling ◽

Membrane Filtration ◽

Membrane Surface ◽

Water Production ◽

Cellulose Acetate Membranes ◽

Wide Range ◽

Drinking Water Production

Membrane fouling by natural organic matter (NOM), namely by humic substances (HS), is a major problem in water treatment for drinking water production using membrane processes. Membrane fouling is dependent on membrane morphology like pore size and on water characteristics namely NOM nature. This work addresses the evaluation of the efficiency of ultrafiltration (UF) and Coagulation/Flocculation/UF performance in terms of permeation fluxes and HS removal, of the water from Tagus River (Valada). The operation of coagulation with chitosan was evaluated as a pretreatment for minimization of membrane fouling. UF experiments were carried out in flat cells of 13.2×10−4 m2 of membrane surface area and at transmembrane pressures from 1 to 4 bar. Five cellulose acetate membranes were laboratory made to cover a wide range of molecular weight cut-off (MWCO): 2,300, 11,000, 28,000, 60,000 and 75,000 Da. Severe fouling is observed for the membranes with the highest cut-off. In the permeation experiments of raw water, coagulation prior to membrane filtration led to a significant improvement of the permeation performance of the membranes with the highest MWCO due to the particles and colloidal matter removal.

Download Full-text

Characterization of natural organic matter (NOM) derived from sewage sludge compost. Part 2: multivariate techniques in the study of compost maturation

Bioresource Technology ◽

10.1016/j.biortech.2004.05.019 ◽

2005 ◽

Vol 96 (4) ◽

pp. 479-484 ◽

Cited By ~ 49

Author(s):

Radosław Zbytniewski ◽

Boguslaw Buszewski

Keyword(s):

Organic Matter ◽

Sewage Sludge ◽

Natural Organic Matter ◽

Multivariate Techniques ◽

Sludge Compost ◽

Sewage Sludge Compost

Download Full-text

Molecular characterization of an end-residue of humeomics applied to a soil humic acid

RSC Advances ◽

10.1039/c4ra01619j ◽

2014 ◽

Vol 4 (45) ◽

pp. 23658-23665 ◽

Cited By ~ 18

Author(s):

A. Nebbioso ◽

A. Piccolo ◽

M. Lamshöft ◽

M. Spiteller

Keyword(s):

Organic Matter ◽

Humic Acid ◽

Molecular Characterization ◽

Natural Organic Matter ◽

Molecular Composition ◽

Chemical Fractionation ◽

Soil Humic Acid

Humeomics encompasses step-wise chemical fractionation and instrumental determination to fully characterize the heterogeneous molecular composition of natural organic matter.

Download Full-text

Isolation and characterization of organic matter-degrading bacteria from coking wastewater treatment plant

Water Science & Technology ◽

10.2166/wst.2018.427 ◽

2018 ◽

Vol 78 (7) ◽

pp. 1517-1524 ◽

Cited By ~ 2

Author(s):

Riqiang Li ◽

Jianxing Wang ◽

Hongjiao Li

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Removal Rate ◽

Treatment Plant ◽

Coking Wastewater ◽

Naphthalene Degradation ◽

Isolation And Characterization ◽

Degrading Bacteria

Abstract As a step toward bioaugmentation of coking wastewater treatment 45 bacteria strains were isolated from the activated sludge of a coking wastewater treatment plant (WWTP). Three strains identified as Bacillus cereus, Pseudomonas synxantha, and Pseudomonas pseudoaligenes exhibited high dehydrogenase activity which indicates a strong ability to degrade organic matter. Subsequently all three strains showed high naphthalene degradation abilities. Naphthalene is a refractory compound often found in coking wastewater. For B. cereus and P. synxantha the maximum naphthalene removal rates were 60.4% and 79.8%, respectively, at an initial naphthalene concentration of 80 mg/L, temperature of 30 °C, pH of 7, a bacteria concentration of 15% (V/V), and shaking speed of 160 r/min. For P. pseudoaligenes, the maximum naphthalene removal rate was 77.4% under similar conditions but at 35 °C.

Download Full-text