Abstract

Aquatic colloids are ubiquitous in nature and are composed of inorganic and organic material. During treatment of drinking water they foul granular filters, membranes, and granular activated carbon and are likely to hinder oxidation processes. The organic fraction of aquatic colloids was isolated from 14 samples (three wastewaters, five reservoirs, three rivers, two biological laboratory reactors, and one treated reservoir water). Transmission electron microscopy revealed nanoscale cellular debris and fibrous material. On the basis of advanced spectroscopic techniques (Fourier transform infrared spectroscopy, C13 nuclear magnetic resonance, and transmission electron microscopy) organic colloids were found to contain peptidoglycan, lipids, carbohydrates, and proteins. Saccharides and hydrolysable amino acids accounted for 44 to 81% of organic carbon. The reactivity of these colloids toward chlorine was also evaluated. Disinfection by-product yields were comparable to other organic matter fractions. During simulation of conventional water treatment, organic colloids were well-removed (42% or 0.41 mg-C/L), and the organic colloid disinfection by-product yield was reduced by 32% for trihalomethanes and 25% for haloacetic acids, illustrating that conventional treatment was highly effective at physical removal. The composition of organic colloids relates to aquatic biological activity and is likely to pose treatment challenges when biologically active waters (e.g.,wastewater reuse, algae-impacted surface water) enter drinking water treatment plants.

Original languageEnglish (US)
Pages (from-to)393-401
Number of pages9
JournalJournal of Environmental Engineering
Volume138
Issue number4
DOIs
StatePublished - Apr 2012

Fingerprint

Colloids
colloid
Potable water
Drinking Water
drinking water
Disinfection
disinfection
Byproducts
transmission electron microscopy
Wastewater
Trihalomethanes
Transmission electron microscopy
wastewater
Water treatment plants
Peptidoglycan
Chlorine
Carbohydrates
Algae
Organic carbon
Bioactivity

Keywords

  • Algae
  • Amino acids
  • Bacteria
  • Coagulation
  • Colloids
  • Disinfection
  • Disinfection by-products
  • Dissolved organic nitrogen
  • Drinking water
  • Nanotechnology
  • Nitrogen
  • Organic matter
  • Organic nanomaterials
  • Vegetation
  • Water treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry
  • Civil and Structural Engineering

Cite this

Character and treatment of organic colloids in challenging and impacted drinking water sources. / Dotson, Aaron; Westerhoff, Paul.

In: Journal of Environmental Engineering, Vol. 138, No. 4, 04.2012, p. 393-401.

Research output: Contribution to journalArticle

@article{c94fa4734c8d4b46853826932a4bf135,
title = "Character and treatment of organic colloids in challenging and impacted drinking water sources",
abstract = "Aquatic colloids are ubiquitous in nature and are composed of inorganic and organic material. During treatment of drinking water they foul granular filters, membranes, and granular activated carbon and are likely to hinder oxidation processes. The organic fraction of aquatic colloids was isolated from 14 samples (three wastewaters, five reservoirs, three rivers, two biological laboratory reactors, and one treated reservoir water). Transmission electron microscopy revealed nanoscale cellular debris and fibrous material. On the basis of advanced spectroscopic techniques (Fourier transform infrared spectroscopy, C13 nuclear magnetic resonance, and transmission electron microscopy) organic colloids were found to contain peptidoglycan, lipids, carbohydrates, and proteins. Saccharides and hydrolysable amino acids accounted for 44 to 81{\%} of organic carbon. The reactivity of these colloids toward chlorine was also evaluated. Disinfection by-product yields were comparable to other organic matter fractions. During simulation of conventional water treatment, organic colloids were well-removed (42{\%} or 0.41 mg-C/L), and the organic colloid disinfection by-product yield was reduced by 32{\%} for trihalomethanes and 25{\%} for haloacetic acids, illustrating that conventional treatment was highly effective at physical removal. The composition of organic colloids relates to aquatic biological activity and is likely to pose treatment challenges when biologically active waters (e.g.,wastewater reuse, algae-impacted surface water) enter drinking water treatment plants.",
keywords = "Algae, Amino acids, Bacteria, Coagulation, Colloids, Disinfection, Disinfection by-products, Dissolved organic nitrogen, Drinking water, Nanotechnology, Nitrogen, Organic matter, Organic nanomaterials, Vegetation, Water treatment",
author = "Aaron Dotson and Paul Westerhoff",
year = "2012",
month = "4",
doi = "10.1061/(ASCE)EE.1943-7870.0000489",
language = "English (US)",
volume = "138",
pages = "393--401",
journal = "Journal of Environmental Engineering, ASCE",
issn = "0733-9372",
publisher = "American Society of Civil Engineers (ASCE)",
number = "4",

}

TY - JOUR

T1 - Character and treatment of organic colloids in challenging and impacted drinking water sources

AU - Dotson, Aaron

AU - Westerhoff, Paul

PY - 2012/4

Y1 - 2012/4

N2 - Aquatic colloids are ubiquitous in nature and are composed of inorganic and organic material. During treatment of drinking water they foul granular filters, membranes, and granular activated carbon and are likely to hinder oxidation processes. The organic fraction of aquatic colloids was isolated from 14 samples (three wastewaters, five reservoirs, three rivers, two biological laboratory reactors, and one treated reservoir water). Transmission electron microscopy revealed nanoscale cellular debris and fibrous material. On the basis of advanced spectroscopic techniques (Fourier transform infrared spectroscopy, C13 nuclear magnetic resonance, and transmission electron microscopy) organic colloids were found to contain peptidoglycan, lipids, carbohydrates, and proteins. Saccharides and hydrolysable amino acids accounted for 44 to 81% of organic carbon. The reactivity of these colloids toward chlorine was also evaluated. Disinfection by-product yields were comparable to other organic matter fractions. During simulation of conventional water treatment, organic colloids were well-removed (42% or 0.41 mg-C/L), and the organic colloid disinfection by-product yield was reduced by 32% for trihalomethanes and 25% for haloacetic acids, illustrating that conventional treatment was highly effective at physical removal. The composition of organic colloids relates to aquatic biological activity and is likely to pose treatment challenges when biologically active waters (e.g.,wastewater reuse, algae-impacted surface water) enter drinking water treatment plants.

AB - Aquatic colloids are ubiquitous in nature and are composed of inorganic and organic material. During treatment of drinking water they foul granular filters, membranes, and granular activated carbon and are likely to hinder oxidation processes. The organic fraction of aquatic colloids was isolated from 14 samples (three wastewaters, five reservoirs, three rivers, two biological laboratory reactors, and one treated reservoir water). Transmission electron microscopy revealed nanoscale cellular debris and fibrous material. On the basis of advanced spectroscopic techniques (Fourier transform infrared spectroscopy, C13 nuclear magnetic resonance, and transmission electron microscopy) organic colloids were found to contain peptidoglycan, lipids, carbohydrates, and proteins. Saccharides and hydrolysable amino acids accounted for 44 to 81% of organic carbon. The reactivity of these colloids toward chlorine was also evaluated. Disinfection by-product yields were comparable to other organic matter fractions. During simulation of conventional water treatment, organic colloids were well-removed (42% or 0.41 mg-C/L), and the organic colloid disinfection by-product yield was reduced by 32% for trihalomethanes and 25% for haloacetic acids, illustrating that conventional treatment was highly effective at physical removal. The composition of organic colloids relates to aquatic biological activity and is likely to pose treatment challenges when biologically active waters (e.g.,wastewater reuse, algae-impacted surface water) enter drinking water treatment plants.

KW - Algae

KW - Amino acids

KW - Bacteria

KW - Coagulation

KW - Colloids

KW - Disinfection

KW - Disinfection by-products

KW - Dissolved organic nitrogen

KW - Drinking water

KW - Nanotechnology

KW - Nitrogen

KW - Organic matter

KW - Organic nanomaterials

KW - Vegetation

KW - Water treatment

UR - http://www.scopus.com/inward/record.url?scp=84860367286&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860367286&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)EE.1943-7870.0000489

DO - 10.1061/(ASCE)EE.1943-7870.0000489

M3 - Article

AN - SCOPUS:84860367286

VL - 138

SP - 393

EP - 401

JO - Journal of Environmental Engineering, ASCE

JF - Journal of Environmental Engineering, ASCE

SN - 0733-9372

IS - 4

ER -