Removal of triclocarban from treated wastewater using cell-immobilized biochar as a sustainable water treatment technology
| Autor: | Sumana Siripattanakul-Ratpukdi, Yuvarat Ngernyen, Thunyalux Ratpukdi, Nontipa Supanchaiyamat, Supitchaya Jenjaiwit, Andrew J. Hunt |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Sorbent
Renewable Energy Sustainability and the Environment Strategy and Management Triclocarban Building and Construction Biodegradation urologic and male genital diseases Pulp and paper industry female genital diseases and pregnancy complications Industrial and Manufacturing Engineering chemistry.chemical_compound Adsorption chemistry Wastewater Biochar Sewage treatment Water treatment General Environmental Science |
| Zdroj: | Journal of Cleaner Production. 320:128919 |
| ISSN: | 0959-6526 |
| DOI: | 10.1016/j.jclepro.2021.128919 |
| Popis: | Triclocarban (TCC), an emerging endocrine disruptor, has been commonly found in municipal treated wastewater. Pseudomonas fluorescens MC46 (MC46), an effective TCC-degrading bacterium, could be applied to remove TCC from wastewater. In addition, application of a cell immobilization technique could possibly enhance its removal performance. This study examined microbial cells immobilized on waste biochar (from wood vinegar production) as a highly effective advanced wastewater treatment unit for TCC removal. TCC removal was investigated from real wastewater samples using the following treatments: biochar only, cell-immobilized biochar, and free cell systems in batch (short-term) and semi-batch (long-term) modes. The TCC adsorption capacities of original and potassium hydroxide-modified biochars (no cells) were 8.43 and 9.17 mg/g, respectively. During the batch experiment, the cell-immobilized modified biochar exhibited the highest TCC removal, 79.80%, in the model TCC solution. Five-cycle semi-batch experiments were utilized to investigate the reusability and performance of the treatment systems. After five cycles, the cell-immobilized modified biochar still achieved stable TCC removal (52%) due to the integration of adsorption and biodegradation. Free MC46 cells and biochars (no MC46 cells) only removed 32% and 2% of TCC, respectively, due to cell washout/death and sorbent exhaustion. This important work clearly demonstrates the significant potential for the future utilization of cell-immobilized biochars in a sustainable wastewater treatment system. Furthermore, the use of renewable agro-industrial wastes aid in the development of a strong circular bio-based economy. |
| Databáze: | OpenAIRE |
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