Physicochemical factors affecting the sensitivity of Ceriodaphnia dubia to copper

S. D. Kim; M. B. Gu; H. E. Allen; D. K. Cha

doi:10.1023/A:1010689432130

Physicochemical factors affecting the sensitivity of Ceriodaphnia dubia to copper

S. D. Kim, M. B. Gu, H. E. Allen, D. K. Cha

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The effects of physicochemical conditions, such as pH, water hardness, flow rates and natural organic substances on the sensitivity of Ceriodaphnia dubia to the toxic effects of copper were investigated using static bioassay cups and specially designed flow-through bioassay chambers. We found that C. dubia was very sensitive to pH changes and the total copper LC50 values of C. dubia neonates increased by 15-fold as the pH increased from pH 7 to 10. It was also observed that the LC50 values increased sharply upon increasing the water hardness value to 2.4 meq. In addition, increasing flow rates from zero to 50 mL hr^-1 also increased its sensitivity to copper, which was possibly due to hydrodynamic stress. The presence of natural organic substances (humic acid and dissolved organic matter) and suspended particles decreased the toxic effect of copper. This significant decrease in the toxicity of copper in the presence of natural organic materials can be explained by a reduction in the free ion concentration due to complexation. Furthermore, we observed that the kinetics of copper interactions with natural organic materials are a significant factor in the toxic effect of copper and that the acute LC50 values increased with increasing reaction time between solubilized copper and water-borne organics.

Original language	English
Pages (from-to)	105-116
Number of pages	12
Journal	Environmental Monitoring and Assessment
Volume	70
Issue number	1-2
DOIs	https://doi.org/10.1023/A:1010689432130
Publication status	Published - 2001
Externally published	Yes

Bibliographical note

Funding Information:
This work was partially supported by the Brain Korea 21 Project and in part by the Korea Science and Engineering Foundation through the ADvanced Environmental Monitoring Research Center at the Kwangju Institute of Science and Technology, and in part by the Korea Electric Power Corporation through the Electrical Engineering and Science Research Institute at Seoul National University.

Keywords

Complexation
Copper
Natural organic substances
Reaction time
Toxicity

ASJC Scopus subject areas

General Environmental Science
Pollution
Management, Monitoring, Policy and Law

Access to Document

10.1023/A:1010689432130

Cite this

@article{1a31e6dd3627455bbdf4c667f054f099,

title = "Physicochemical factors affecting the sensitivity of Ceriodaphnia dubia to copper",

abstract = "The effects of physicochemical conditions, such as pH, water hardness, flow rates and natural organic substances on the sensitivity of Ceriodaphnia dubia to the toxic effects of copper were investigated using static bioassay cups and specially designed flow-through bioassay chambers. We found that C. dubia was very sensitive to pH changes and the total copper LC50 values of C. dubia neonates increased by 15-fold as the pH increased from pH 7 to 10. It was also observed that the LC50 values increased sharply upon increasing the water hardness value to 2.4 meq. In addition, increasing flow rates from zero to 50 mL hr-1 also increased its sensitivity to copper, which was possibly due to hydrodynamic stress. The presence of natural organic substances (humic acid and dissolved organic matter) and suspended particles decreased the toxic effect of copper. This significant decrease in the toxicity of copper in the presence of natural organic materials can be explained by a reduction in the free ion concentration due to complexation. Furthermore, we observed that the kinetics of copper interactions with natural organic materials are a significant factor in the toxic effect of copper and that the acute LC50 values increased with increasing reaction time between solubilized copper and water-borne organics.",

keywords = "Complexation, Copper, Natural organic substances, Reaction time, Toxicity",

author = "Kim, {S. D.} and Gu, {M. B.} and Allen, {H. E.} and Cha, {D. K.}",

note = "Funding Information: This work was partially supported by the Brain Korea 21 Project and in part by the Korea Science and Engineering Foundation through the ADvanced Environmental Monitoring Research Center at the Kwangju Institute of Science and Technology, and in part by the Korea Electric Power Corporation through the Electrical Engineering and Science Research Institute at Seoul National University.",

year = "2001",

doi = "10.1023/A:1010689432130",

language = "English",

volume = "70",

pages = "105--116",

journal = "Environmental Monitoring and Assessment",

issn = "0167-6369",

publisher = "Springer Science and Business Media Deutschland GmbH",

number = "1-2",

}

TY - JOUR

T1 - Physicochemical factors affecting the sensitivity of Ceriodaphnia dubia to copper

AU - Kim, S. D.

AU - Gu, M. B.

AU - Allen, H. E.

AU - Cha, D. K.

N1 - Funding Information: This work was partially supported by the Brain Korea 21 Project and in part by the Korea Science and Engineering Foundation through the ADvanced Environmental Monitoring Research Center at the Kwangju Institute of Science and Technology, and in part by the Korea Electric Power Corporation through the Electrical Engineering and Science Research Institute at Seoul National University.

PY - 2001

Y1 - 2001

N2 - The effects of physicochemical conditions, such as pH, water hardness, flow rates and natural organic substances on the sensitivity of Ceriodaphnia dubia to the toxic effects of copper were investigated using static bioassay cups and specially designed flow-through bioassay chambers. We found that C. dubia was very sensitive to pH changes and the total copper LC50 values of C. dubia neonates increased by 15-fold as the pH increased from pH 7 to 10. It was also observed that the LC50 values increased sharply upon increasing the water hardness value to 2.4 meq. In addition, increasing flow rates from zero to 50 mL hr-1 also increased its sensitivity to copper, which was possibly due to hydrodynamic stress. The presence of natural organic substances (humic acid and dissolved organic matter) and suspended particles decreased the toxic effect of copper. This significant decrease in the toxicity of copper in the presence of natural organic materials can be explained by a reduction in the free ion concentration due to complexation. Furthermore, we observed that the kinetics of copper interactions with natural organic materials are a significant factor in the toxic effect of copper and that the acute LC50 values increased with increasing reaction time between solubilized copper and water-borne organics.

AB - The effects of physicochemical conditions, such as pH, water hardness, flow rates and natural organic substances on the sensitivity of Ceriodaphnia dubia to the toxic effects of copper were investigated using static bioassay cups and specially designed flow-through bioassay chambers. We found that C. dubia was very sensitive to pH changes and the total copper LC50 values of C. dubia neonates increased by 15-fold as the pH increased from pH 7 to 10. It was also observed that the LC50 values increased sharply upon increasing the water hardness value to 2.4 meq. In addition, increasing flow rates from zero to 50 mL hr-1 also increased its sensitivity to copper, which was possibly due to hydrodynamic stress. The presence of natural organic substances (humic acid and dissolved organic matter) and suspended particles decreased the toxic effect of copper. This significant decrease in the toxicity of copper in the presence of natural organic materials can be explained by a reduction in the free ion concentration due to complexation. Furthermore, we observed that the kinetics of copper interactions with natural organic materials are a significant factor in the toxic effect of copper and that the acute LC50 values increased with increasing reaction time between solubilized copper and water-borne organics.

KW - Complexation

KW - Copper

KW - Natural organic substances

KW - Reaction time

KW - Toxicity

UR - http://www.scopus.com/inward/record.url?scp=0034923978&partnerID=8YFLogxK

U2 - 10.1023/A:1010689432130

DO - 10.1023/A:1010689432130

M3 - Article

C2 - 11516008

AN - SCOPUS:0034923978

SN - 0167-6369

VL - 70

SP - 105

EP - 116

JO - Environmental Monitoring and Assessment

JF - Environmental Monitoring and Assessment

IS - 1-2

ER -

Physicochemical factors affecting the sensitivity of Ceriodaphnia dubia to copper

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this