Pre-ozonation of commercial textile tannins: Effects on biodegradability and toxicity

Sebnem Koyunluoglu; Idil Arslan-Alaton; Gulen Eremektar; Fatos Germirli-Babuna

doi:10.1080/10934520600779083

Pre-ozonation of commercial textile tannins: Effects on biodegradability and toxicity

Sebnem Koyunluoglu, Idil Arslan-Alaton^*, Gulen Eremektar, Fatos Germirli-Babuna

^*Corresponding author for this work

Department of Environmental Engineering

Yeditepe University

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

16 Citations (Scopus)

Abstract

The effect of ozonation on the biodegradability and acute toxicity of two frequently used textile dye assisting chemicals, namely natural tannin (NT) having an initial chemical oxygen demand (COD₀) of 1195 mg L ^-1; initial total organic carbon (TOC₀) of 342 mg L ^-1; initial 5th-day biochemical oxygen demand (BOD_5,0) of 86 mg L^-1; initial ultraviolet absorbance at 280 nm wavelength (UV_280,0) of 32.2 cm^-1; initial ultraviolet absorbance at 254 nm wavelength (UV_254,0) of 19.35 cm^-1 and synthetic tannin (ST); with a COD₀ of 465 mg L^-1; TOC₀ of 155 mg L^-1; BOD_5,0 of 6 mg L^-1; UV _280,0 of 11.78 cm^-1; UV_254,0 of 13.74 cm ^-1 was investigated. Synthetic wastewater bearing these tannin formulations was individually prepared and subjected to ozonation at varying doses (500 and 1000 mg h^-1), and pHs (3.5 and 7.0) to elucidate the effect of ozone dose and pH on oxidation efficiency. Changes in the environmental sum parameters chemical oxygen demand (COD), total organic carbon (TOC), 5th-day biochemical oxygen demand (BOD₅), ultraviolet absorbance at 280 nm wavelength (UV₂₈₀) and ultraviolet absorbance at 254 nm wavelength (UV₂₅₄), the latter two representing the aromaticity and double bonds of the studied textile tannins, respectively, were monitored during the course of ozonation. In the second part of the study, the biodegradability and acute toxicity of the raw and pre-ozonated textile tannins were evaluated in terms of the BOD 5 parameter and an activated sludge inhibition test, respectively. Results indicated no significant changes in acute toxicity for NT, whereas the inhibitory effect of ST could be completely eliminated after 40 min ozonation at a rate of 1000 mg h^-1 (i.e., at a specific ozone dose of 1.4 mg O₃ (mg COD₀)^-1 and a pH of 3.5. In conclusion, pre-ozonation appeared to be potential pretreatment option to achieve complete detoxification and a fair biodegradability improvement of the otherwise refractory synthetic tannin.

Original language	English
Pages (from-to)	1873-1886
Number of pages	14
Journal	Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume	41
Issue number	9
DOIs	https://doi.org/10.1080/10934520600779083
Publication status	Published - 1 Sept 2006

Funding

The authors are thankful to Dr. Izzet Alaton, Head of the Research & Development Department of Pisa Tekstil, for his courtesy of supplying the textile tannins. The present study was financially supported by TUBITAK (Turkish Scientific and Technical Research Council) under project Nr. ICTAG–C–075 for our participation in COST Action 628 “Pollution Prevention and BAT for the Textile Dyeing and Finishing Industry.”

Funders	Funder number
TUBITAK
Consejo Nacional de Investigaciones Científicas y Técnicas

Keywords

Biodegradability
Ozonation
Tannins
Textile industry
Toxicity

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1080/10934520600779083

Cite this

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title = "Pre-ozonation of commercial textile tannins: Effects on biodegradability and toxicity",

abstract = "The effect of ozonation on the biodegradability and acute toxicity of two frequently used textile dye assisting chemicals, namely natural tannin (NT) having an initial chemical oxygen demand (COD0) of 1195 mg L -1; initial total organic carbon (TOC0) of 342 mg L -1; initial 5th-day biochemical oxygen demand (BOD5,0) of 86 mg L-1; initial ultraviolet absorbance at 280 nm wavelength (UV280,0) of 32.2 cm-1; initial ultraviolet absorbance at 254 nm wavelength (UV254,0) of 19.35 cm-1 and synthetic tannin (ST); with a COD0 of 465 mg L-1; TOC0 of 155 mg L-1; BOD5,0 of 6 mg L-1; UV 280,0 of 11.78 cm-1; UV254,0 of 13.74 cm -1 was investigated. Synthetic wastewater bearing these tannin formulations was individually prepared and subjected to ozonation at varying doses (500 and 1000 mg h-1), and pHs (3.5 and 7.0) to elucidate the effect of ozone dose and pH on oxidation efficiency. Changes in the environmental sum parameters chemical oxygen demand (COD), total organic carbon (TOC), 5th-day biochemical oxygen demand (BOD5), ultraviolet absorbance at 280 nm wavelength (UV280) and ultraviolet absorbance at 254 nm wavelength (UV254), the latter two representing the aromaticity and double bonds of the studied textile tannins, respectively, were monitored during the course of ozonation. In the second part of the study, the biodegradability and acute toxicity of the raw and pre-ozonated textile tannins were evaluated in terms of the BOD 5 parameter and an activated sludge inhibition test, respectively. Results indicated no significant changes in acute toxicity for NT, whereas the inhibitory effect of ST could be completely eliminated after 40 min ozonation at a rate of 1000 mg h-1 (i.e., at a specific ozone dose of 1.4 mg O3 (mg COD0)-1 and a pH of 3.5. In conclusion, pre-ozonation appeared to be potential pretreatment option to achieve complete detoxification and a fair biodegradability improvement of the otherwise refractory synthetic tannin.",

keywords = "Biodegradability, Ozonation, Tannins, Textile industry, Toxicity",

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Pre-ozonation of commercial textile tannins: Effects on biodegradability and toxicity. / Koyunluoglu, Sebnem; Arslan-Alaton, Idil ; Eremektar, Gulen et al.
In: Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering, Vol. 41, No. 9, 01.09.2006, p. 1873-1886.

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

TY - JOUR

T1 - Pre-ozonation of commercial textile tannins

T2 - Effects on biodegradability and toxicity

AU - Koyunluoglu, Sebnem

AU - Arslan-Alaton, Idil

AU - Eremektar, Gulen

AU - Germirli-Babuna, Fatos

PY - 2006/9/1

Y1 - 2006/9/1

N2 - The effect of ozonation on the biodegradability and acute toxicity of two frequently used textile dye assisting chemicals, namely natural tannin (NT) having an initial chemical oxygen demand (COD0) of 1195 mg L -1; initial total organic carbon (TOC0) of 342 mg L -1; initial 5th-day biochemical oxygen demand (BOD5,0) of 86 mg L-1; initial ultraviolet absorbance at 280 nm wavelength (UV280,0) of 32.2 cm-1; initial ultraviolet absorbance at 254 nm wavelength (UV254,0) of 19.35 cm-1 and synthetic tannin (ST); with a COD0 of 465 mg L-1; TOC0 of 155 mg L-1; BOD5,0 of 6 mg L-1; UV 280,0 of 11.78 cm-1; UV254,0 of 13.74 cm -1 was investigated. Synthetic wastewater bearing these tannin formulations was individually prepared and subjected to ozonation at varying doses (500 and 1000 mg h-1), and pHs (3.5 and 7.0) to elucidate the effect of ozone dose and pH on oxidation efficiency. Changes in the environmental sum parameters chemical oxygen demand (COD), total organic carbon (TOC), 5th-day biochemical oxygen demand (BOD5), ultraviolet absorbance at 280 nm wavelength (UV280) and ultraviolet absorbance at 254 nm wavelength (UV254), the latter two representing the aromaticity and double bonds of the studied textile tannins, respectively, were monitored during the course of ozonation. In the second part of the study, the biodegradability and acute toxicity of the raw and pre-ozonated textile tannins were evaluated in terms of the BOD 5 parameter and an activated sludge inhibition test, respectively. Results indicated no significant changes in acute toxicity for NT, whereas the inhibitory effect of ST could be completely eliminated after 40 min ozonation at a rate of 1000 mg h-1 (i.e., at a specific ozone dose of 1.4 mg O3 (mg COD0)-1 and a pH of 3.5. In conclusion, pre-ozonation appeared to be potential pretreatment option to achieve complete detoxification and a fair biodegradability improvement of the otherwise refractory synthetic tannin.

AB - The effect of ozonation on the biodegradability and acute toxicity of two frequently used textile dye assisting chemicals, namely natural tannin (NT) having an initial chemical oxygen demand (COD0) of 1195 mg L -1; initial total organic carbon (TOC0) of 342 mg L -1; initial 5th-day biochemical oxygen demand (BOD5,0) of 86 mg L-1; initial ultraviolet absorbance at 280 nm wavelength (UV280,0) of 32.2 cm-1; initial ultraviolet absorbance at 254 nm wavelength (UV254,0) of 19.35 cm-1 and synthetic tannin (ST); with a COD0 of 465 mg L-1; TOC0 of 155 mg L-1; BOD5,0 of 6 mg L-1; UV 280,0 of 11.78 cm-1; UV254,0 of 13.74 cm -1 was investigated. Synthetic wastewater bearing these tannin formulations was individually prepared and subjected to ozonation at varying doses (500 and 1000 mg h-1), and pHs (3.5 and 7.0) to elucidate the effect of ozone dose and pH on oxidation efficiency. Changes in the environmental sum parameters chemical oxygen demand (COD), total organic carbon (TOC), 5th-day biochemical oxygen demand (BOD5), ultraviolet absorbance at 280 nm wavelength (UV280) and ultraviolet absorbance at 254 nm wavelength (UV254), the latter two representing the aromaticity and double bonds of the studied textile tannins, respectively, were monitored during the course of ozonation. In the second part of the study, the biodegradability and acute toxicity of the raw and pre-ozonated textile tannins were evaluated in terms of the BOD 5 parameter and an activated sludge inhibition test, respectively. Results indicated no significant changes in acute toxicity for NT, whereas the inhibitory effect of ST could be completely eliminated after 40 min ozonation at a rate of 1000 mg h-1 (i.e., at a specific ozone dose of 1.4 mg O3 (mg COD0)-1 and a pH of 3.5. In conclusion, pre-ozonation appeared to be potential pretreatment option to achieve complete detoxification and a fair biodegradability improvement of the otherwise refractory synthetic tannin.

KW - Biodegradability

KW - Ozonation

KW - Tannins

KW - Textile industry

KW - Toxicity

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VL - 41

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JO - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering

JF - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering

IS - 9

ER -

Pre-ozonation of commercial textile tannins: Effects on biodegradability and toxicity

Abstract

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Keywords

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