scholarly journals Organic matter and the surface charge of suspended particles in estuarine waters1

1982 ◽  
Vol 27 (2) ◽  
pp. 322-335 ◽  
Author(s):  
K. A. Hunter ◽  
P. S. Liss
Keyword(s):  
Organic Matter ◽  
Surface Charge ◽  
Suspended Particles

Suspended particles in the drinking water of two distribution systems

2001 ◽  
Vol 1 (4) ◽  
pp. 237-245 ◽  
Author(s):  
V. Gauthier ◽  
B. Barbeau ◽  
R. Millette ◽  
J.-C. Block ◽  
M. Prévost
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Organic Matter ◽  
Distribution System ◽  
Distribution Systems ◽  
Suspended Solids ◽  
Suspended Particles ◽  
Raw Water ◽  
Remote Locations ◽  
Dissolved Matter

The concentrations of suspended particles were measured in the drinking water of two distribution systems, and the nature of these particles documented. The concentrations of particulate matter were invariably found to be small (maximum 350 μg/L). They are globally in the very low range in comparison with dissolved matter concentrations, which are measured in several hundreds of mg/L. Except during special water quality events, such as turnover of the raw water resource, results show that organic matter represents the most important fraction of suspended solids (from 40 to 76%) in treated and distributed water. Examination of the nature of the particles made it possible to develop several hypotheses about the type of particles penetrating Montreal's distribution system during the turnover period (algae skeleton, clays). These particles were found to have been transported throughout the distribution systems quite easily, and this could result in the accumulation of deposits if their surface charge were ever even slightly destabilised, or if the particles were to penetrate the laminar flow areas that are fairly typical of remote locations in distribution systems.

scholarly journals NO2 and natural organic matter affect both soot aggregation behavior and sorption of S-metolachlor

2019 ◽  
Vol 21 (10) ◽  
pp. 1729-1735 ◽  
Author(s):  
Gabriel Sigmund ◽  
Stephanie Castan ◽  
Christopher Wabnitz ◽  
Rani Bakkour ◽  
Thorsten Hüffer ◽  
...  
Keyword(s):  
Organic Matter ◽  
Surface Charge ◽  
Natural Organic Matter ◽  
Organic Contaminants ◽  
Aggregation Behavior ◽  
P Transformation

Transformation of soot with NO2 and interactions with NOM decreased the soot surface charge, size and sorption affinity for organic contaminants.

Effects of Natural Organic Matter and Ionic Species on Membrane Surface Charge

2002 ◽  
Vol 36 (17) ◽  
pp. 3864-3871 ◽  
Author(s):  
Yongki Shim ◽  
Hong-Joo Lee ◽  
Sangyoup Lee ◽  
Seung-Hyeon Moon ◽  
Jaeweon Cho
Keyword(s):  
Organic Matter ◽  
Surface Charge ◽  
Natural Organic Matter ◽  
Membrane Surface ◽  
Ionic Species ◽  
Membrane Surface Charge

scholarly journals X-ray fluorescence mapping of mercury on suspended mineral particles and diatoms in a contaminated freshwater system

2014 ◽  
Vol 11 (18) ◽  
pp. 5259-5267 ◽  
Author(s):  
B. Gu ◽  
B. Mishra ◽  
C. Miller ◽  
W. Wang ◽  
B. Lai ◽  
...  
Keyword(s):  
Organic Matter ◽  
Iron Oxides ◽  
Natural Organic Matter ◽  
Spatial Localization ◽  
Suspended Particles ◽  
Aquatic Environments ◽  
X Ray ◽  
Mineral Particles ◽  
Geochemical Cycling ◽  
Freshwater System

Abstract. Mercury (Hg) bioavailability and geochemical cycling is affected by its partitioning between the aqueous and particulate phases. We applied a synchrotron-based X-ray fluorescence (XRF) microprobe to visualize and quantify directly the spatial localization of Hg and its correlations with other elements of interest on suspended particles from a Hg-contaminated freshwater system. Up to 175 μg g−1 Hg is found on suspended particles, but less than 0.01% is in the form of methylmercury. Mercury is heterogeneously distributed among phytoplankton (e.g., diatoms) and mineral particles that are rich in iron oxides and natural organic matter (NOM). The diatom-bound Hg is mostly found on outer surfaces of the cells, suggesting passive sorption of Hg on diatoms. Our results indicate that localized sorption of Hg onto suspended particles, including diatoms and NOM-coated oxide minerals, may play an important role in affecting the partitioning, reactivity, and biogeochemical cycling of Hg in natural aquatic environments.

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