Microbial release of exopolymeric substances and their role in removal of pollutants from wastewater

2021 ◽  
pp. 571-587
Author(s):  
E. Işıl Arslan Topal ◽  
Murat Topal
Keyword(s):  
Exopolymeric Substances

scholarly journals Marine Gel Interactions with Hydrophilic and Hydrophobic Pollutants

Gels ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 83
Author(s):  
Peter H. Santschi ◽  
Wei-Chun Chin ◽  
Antonietta Quigg ◽  
Chen Xu ◽  
Manoj Kamalanathan ◽  
...  
Keyword(s):  
Metal Ions ◽  
Food Web ◽  
Microbial Ecology ◽  
Particle Interactions ◽  
Marine Microbes ◽  
Element Cycling ◽  
Exopolymeric Substances ◽  
Hydrophobic Pollutants ◽  
Pollutant Distribution ◽  
Ultimate Fate

Microgels play critical roles in a variety of processes in the ocean, including element cycling, particle interactions, microbial ecology, food web dynamics, air–sea exchange, and pollutant distribution and transport. Exopolymeric substances (EPS) from various marine microbes are one of the major sources for marine microgels. Due to their amphiphilic nature, many types of pollutants, especially hydrophobic ones, have been found to preferentially associate with marine microgels. The interactions between pollutants and microgels can significantly impact the transport, sedimentation, distribution, and the ultimate fate of these pollutants in the ocean. This review on marine gels focuses on the discussion of the interactions between gel-forming EPS and pollutants, such as oil and other hydrophobic pollutants, nanoparticles, and metal ions.

scholarly journals The role of exopolymeric substances in the bioaccumulation and toxicity of Ag nanoparticles to algae

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Kaijun Zhou ◽  
Yi Hu ◽  
Luqing Zhang ◽  
Kun Yang ◽  
Daohui Lin
Keyword(s):  
Ag Nanoparticles ◽  
Exopolymeric Substances

Effect of exopolymeric substances on the kinetics of sorption and desorption of trivalent chromium in soil

2014 ◽  
Vol 68 (1) ◽  
Author(s):  
Cetin Kantar ◽  
Aydeniz Demir ◽  
Nurcan Koleli
Keyword(s):  
Soil Water ◽  
Water System ◽  
Strong Interactions ◽  
Column Experiments ◽  
Soil Minerals ◽  
Total Chromium ◽  
Batch Sorption ◽  
Exopolymeric Substances ◽  
Kinetics Of ◽  
Low Solubility

AbstractLaboratory batch sorption-desorption and column experiments were performed to better understand the effects of microbial exopolymeric substances (EPS) on Cr(III) sorption/desorption rates in the soil-water system. The experiments were carried out in two different modes: one mode (sorption) in which Cr(III) and EPS were applied simultaneously, and the other (desorption) included the sequential application of Cr(III) and EPS to the soil-water system. The batch sorption and desorption experiments showed that, while chromium(III) desorption was significantly enhanced in the presence of EPS relative to non-EPS-containing systems, the desorption rates were much smaller than the sorption rates, and the fraction dissolved by EPS accounted for only a small portion of the total chromium initially sorbed onto soil minerals. Similarly, the column experiments suggested that, while the microbial EPS led to an increase in Cr dissolution relative to non-EPS-containing systems, only a small portion of the total chromium initially added to the soil was mobilised. The differences observed in Cr sorption and desorption rates can be explained through the very low solubility and strong interactions of chromium species with soil minerals as well as the mass transfer effects associated with low diffusion rates. The overall results suggest that, while microbial EPS may play an important role in microbial Cr(VI) treatment in sub-surface systems due to the formation of soluble Cr-EPS complexes, the extent and degree of Cr mobilisation are highly dependent on the type of initial Cr sorption.

scholarly journals Exopolymeric substances (EPS) produced by petroleum microbial consortia

2010 ◽  
Vol 21 (8) ◽  
pp. 1517-1523 ◽  
Author(s):  
Georgiana F. da Cruz ◽  
Célio F. F. Angolini ◽  
Eugênio V. dos Santos Neto ◽  
Watson Loh ◽  
Anita J. Marsaioli
Keyword(s):  
Microbial Consortia ◽  
Exopolymeric Substances

scholarly journals The Effect of Gold and Iron-Oxide Nanoparticles on Biofilm-Forming Pathogens

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Madhu Bala Sathyanarayanan ◽  
Reneta Balachandranath ◽  
Yuvasri Genji Srinivasulu ◽  
Sathish Kumar Kannaiyan ◽  
Guruprakash Subbiahdoss
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Immune Cells ◽  
Biofilm Formation ◽  
Bacterial Infections ◽  
Medical Applications ◽  
Oxide Nanoparticles ◽  
Biofilm Growth ◽  
Microbial Biofilms ◽  
Exopolymeric Substances

Microbial biofilms on biomaterial implants or devices are hard to eliminate by antibiotics due to their protection by exopolymeric substances that embed the organisms in a matrix, impenetrable for most antibiotics and immune-cells. Application of metals in their nanoparticulated form is currently considered to resolve bacterial infections. Gold and iron-oxide nanoparticles are widely used in different medical applications, but their utilisation to eradicate biofilms on biomaterials implants is novel. Here, we studied the effect of gold and iron oxide nanoparticles on Staphylococcus aureus and Pseudomonas aeruginosa biofilms. We report that biofilm growth was reduced at higher concentrations of gold and iron-oxide nanoparticles compared to absence of nanoparticles. Thus nanoparticles with appropriate concentration could show significant reduction in biofilm formation.

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