Treating High COD Dyeing Wastewater via a Regenerative Sorption-Oxidation Process Using a Nano-Pored Activated Carbon Article Swipe
Shih‐Fu Ou
,
Dun‐Sheng Yang
,
Liao Jiawei
,
Shyi‐Tien Chen
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.3390/ijms23094752
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.3390/ijms23094752
Nowadays, the structural complexity of dyes used in the textile industry and the widely adopted water-saving strategy in the dyeing processes often fail plants’ biological wastewater treatment units due to chemical oxygen demand (COD) overload. To alleviate this problems, this study investigated a regenerable adsorption–oxidation process to treat dyeing wastewater with COD around 10,000 mg/dm3 using a highly nano-pored activated carbon (AC) as a COD adsorbent, followed by its regeneration using hydrogen peroxide as an oxidizing reagent. In addition to studying AC’s COD adsorption and oxidation performance, its operational treatment conditions in terms of temperature and pH were assessed. The results firstly demonstrated that about 50–60% of the COD was consistently adsorbed during the repeated adsorption operation before reaching AC’s maximum adsorption capacity (qmax) of 0.165 g-COD/g-AC. The optimal pH and temperature during adsorption were 4.7 and 25 °C, respectively. Secondly, AC regeneration was accomplished by using an initial peroxide concentration of 2.5% (by wt %) and EDTA-Fe of 2.12 mmole/dm3. The reuse of the regenerated ACs was doable. Surprisingly, after the first AC regeneration, the COD adsorption capacity of the regenerated AC even increased by ~7% with respect to the virgin AC. Thirdly, the results of a five-consecutive adsorption–regeneration operation showed that a total of 0.3625 g COD was removed by the 5 g AC used, which was equivalent to an adsorption capacity (q) of 0.0725 (= 0.3625/5) g-COD/g-AC during each adsorption stage. Based on the obtained results, a regenerable COD adsorption–oxidation process using a nano-pored AC to treat the high-textile-COD wastewater looks promising. Thus, a conceptual treatment unit was proposed, and its potential benefits and limitations were addressed.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/ijms23094752
- https://www.mdpi.com/1422-0067/23/9/4752/pdf?version=1650959317
- OA Status
- gold
- Cited By
- 9
- References
- 25
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4224991325
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
-
https://openalex.org/W4224991325Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.3390/ijms23094752Digital Object Identifier
- Title
-
Treating High COD Dyeing Wastewater via a Regenerative Sorption-Oxidation Process Using a Nano-Pored Activated CarbonWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2022Year of publication
- Publication date
-
2022-04-26Full publication date if available
- Authors
-
Shih‐Fu Ou, Dun‐Sheng Yang, Liao Jiawei, Shyi‐Tien ChenList of authors in order
- Landing page
-
https://doi.org/10.3390/ijms23094752Publisher landing page
- PDF URL
-
https://www.mdpi.com/1422-0067/23/9/4752/pdf?version=1650959317Direct link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
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https://www.mdpi.com/1422-0067/23/9/4752/pdf?version=1650959317Direct OA link when available
- Concepts
-
Adsorption, Sorption, Chemistry, Wastewater, Activated carbon, Hydrogen peroxide, Chemical oxygen demand, Reagent, Oxidizing agent, Pulp and paper industry, Dyeing, Nuclear chemistry, Chemical engineering, Organic chemistry, Environmental engineering, Environmental science, EngineeringTop concepts (fields/topics) attached by OpenAlex
- Cited by
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9Total citation count in OpenAlex
- Citations by year (recent)
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2025: 2, 2024: 4, 2023: 1, 2022: 2Per-year citation counts (last 5 years)
- References (count)
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25Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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