The Role of Natural Organic Matter (Humic Substances) on Adsorption of Pesticides Possessing Endocrine Disruptor Activity

AbstractUrea-based multi-coated slow release fertilizer was produced using water hyacinth, humic substances, and chitosan, with water rich in natural organic matter as a solvent. Elemental analysis showed that the nitrogen content of the fertilizer (FERT) was around 20%. Swelling tests demonstrated the effectiveness of the water hyacinth crosslinker, which reduced the water permeability of the material. Leaching tests showed that FERT released a very low concentration of ammonium (0.82 mg L−1), compared to the amount released from urea (43.1 mg L−1). No nitrate leaching was observed for FERT, while urea leached 13.1 mg L−1 of nitrate. In water and soil, FERT showed maximum releases after 30 and 40 days, respectively, while urea reached maxima in just 2 and 5 days, respectively. The results demonstrated the promising ability of FERT to reduce nitrogen losses, as well as to minimize environmental impacts in the soil–plant-atmosphere system and to improve the efficiency of nitrogen fertilization. Graphic abstract

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Impact of Natural Organic Matter on Monochloramine Reduction by Granular Activated Carbon: The Role of Porosity and Electrostatic Surface Properties

Environmental Science & Technology ◽

10.1021/es060111j ◽

2006 ◽

Vol 40 (13) ◽

pp. 4268-4273 ◽

Cited By ~ 21

Author(s):

Julian L. Fairey ◽

Gerald E. Speitel ◽

Lynn E. Katz

Keyword(s):

Organic Matter ◽

Activated Carbon ◽

Surface Properties ◽

Natural Organic Matter ◽

Granular Activated Carbon

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Phylogenetic and Functional Diversity of Saprolegniales and Fungi Isolated from Temperate Lakes in Northeast Germany

Journal of Fungi ◽

10.3390/jof7110968 ◽

2021 ◽

Vol 7 (11) ◽

pp. 968

Author(s):

Hossein Masigol ◽

Jason Nicholas Woodhouse ◽

Pieter van West ◽

Reza Mostowfizadeh-Ghalamfarsa ◽

Keilor Rojas-Jimenez ◽

...

Keyword(s):

Organic Matter ◽

Dissolved Organic Matter ◽

Enzymatic Activity ◽

Humic Substances ◽

Plant Litter ◽

Freshwater Ecosystems ◽

Chitinolytic Activity ◽

Ecological Implications ◽

Eukaryotic Organisms

The contribution of fungi to the degradation of plant litter and transformation of dissolved organic matter (humic substances, in particular) in freshwater ecosystems has received increasing attention recently. However, the role of Saprolegniales as one of the most common eukaryotic organisms is rarely studied. In this study, we isolated and phylogenetically placed 51 fungal and 62 Saprolegniales strains from 12 German lakes. We studied the cellulo-, lignino-, and chitinolytic activity of the strains using plate assays. Furthermore, we determined the capacity of 10 selected strains to utilize 95 different labile compounds, using Biolog FF MicroPlates™. Finally, the ability of three selected strains to utilize maltose and degrade/produce humic substances was measured. Cladosporium and Penicillium were amongst the most prevalent fungal strains, while Saprolegnia, Achlya, and Leptolegnia were the most frequent Saprolegniales strains. Although the isolated strains assigned to genera were phylogenetically similar, their enzymatic activity and physiological profiling were quite diverse. Our results indicate that Saprolegniales, in contrast to fungi, lack ligninolytic activity and are not involved in the production/transformation of humic substances. We hypothesize that Saprolegniales and fungi might have complementary roles in interacting with dissolved organic matter, which has ecological implications for carbon cycling in freshwater ecosystems.

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Application of composite flocculants for removing organic matter and mitigating ultrafiltration membrane fouling in surface water treatment: the role of composite ratio

Environmental Science Water Research & Technology ◽

10.1039/c9ew00528e ◽

2019 ◽

Vol 5 (12) ◽

pp. 2242-2250

Author(s):

Xue Shen ◽

Baoyu Gao ◽

Kangying Guo ◽

Qinyan Yue

Keyword(s):

Organic Matter ◽

Water Treatment ◽

Surface Water ◽

Membrane Permeability ◽

Natural Organic Matter ◽

Membrane Fouling ◽

Ultrafiltration Membrane ◽

Surface Water Treatment ◽

Ultrafiltration Membrane Fouling

Coagulation prior to the ultrafiltration (UF) process was implemented to improve natural organic matter (NOM) removal and membrane permeability.

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Investigation of membrane fouling by synthetic and natural particles

Water Science & Technology ◽

10.2166/wst.2004.0724 ◽

2004 ◽

Vol 50 (12) ◽

pp. 279-285 ◽

Cited By ~ 1

Author(s):

J.H. Kweon ◽

D.F. Lawler

Keyword(s):

Organic Matter ◽

Natural Organic Matter ◽

Membrane Fouling ◽

Membrane Surface ◽

Research Articles ◽

Clay Material ◽

Dramatic Effect ◽

Flux Decline ◽

Scanning Electron

The biggest impediment for applying membrane processes is fouling that comes from mass flux (such as particle and organic matter) to the membrane surface and its pores. Numerous research articles have indicated that either particles or natural organic matter (NOM) has been the most detrimental foulant. Therefore, the role of particles in membrane fouling was investigated with two synthetic waters (having either particles alone or particles with simple organic matter) and a natural water. Membrane fouling was evaluated with flux decline behavior and direct images from scanning electron microscopy. The results showed that the combined fouling by kaolin and dextran (a simple organic compound selected as a surrogate for NOM) showed no difference from the fouling with only the organic matter. The similarity might stem from the fact that dextran (i.e., polysaccharide) has no ability to be adsorbed on the clay material, so that the polysaccharide behaves the same with respect to the membrane with or without clay material being present. In contrast to kaolin, the natural particles showed a dramatic effect on membrane fouling.

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