Assessing the Plant Phytoremediation Efficacy for Azolla filiculoides in the Treatment of Textile Effluent and Redemption of Congo Red Dye onto Azolla Biomass
| Autor: | Dongjin Choi, Abdulrahman Al-hashimi, Prabu Deivasigamani, Sathish Sundararaman, Aravind Kumar Jagadeesan, Ponnusamy Senthil Kumar, Marshiana Devaerakkam |
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| Rok vydání: | 2021 |
| Předmět: |
Sorbent
Geography Planning and Development TJ807-830 phytoremediation Management Monitoring Policy and Law TD194-195 Renewable energy sources symbols.namesake chemistry.chemical_compound Adsorption Bioremediation GE1-350 Effluent Azolla filiculoides Environmental effects of industries and plants biology Renewable Energy Sustainability and the Environment toxic pollutants Langmuir adsorption model biology.organism_classification Pulp and paper industry Azolla Congo red Environmental sciences chemistry adsorption kinetics symbols |
| Zdroj: | Sustainability Volume 13 Issue 17 Sustainability, Vol 13, Iss 9588, p 9588 (2021) |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su13179588 |
| Popis: | In this work, Azolla filiculoides was used for the bioremediation of a textile effluent and as a potential sorbent for the rejection of Congo red (CR9) dye from a synthetic aqueous solution. The sorbent was characterized, and a pot culture test was carried out to assess the physiological responses in a controlled environment. The response of the plants to the exposure to the emanating pollutants was subordinate. The BOD, COD, and TDS removals were found to be 98.2%, 98.23%, and 90.29%, respectively. Moreover, the dried biomass was studied for the expulsion of CR9, and the process variables were optimized. The maximum CR9 removal was 95% at the optimal conditions of 2 g/L of the sorbent dose at acidic pH. Equilibrium data for adsorption were analyzed using a two-parameter isotherm model. It was observed that the Langmuir isotherm fit with the data (R2 = 0.98) and also had satisfactory lower error values, with its maximum sorption capacity reaching 243 mg/g. The pseudo-second-order kinetics were well fitted (R2 = 0.98). The mass transfer models and the thermodynamic parameters of the system were evaluated. The regeneration studies also showed that the uptake efficacy in the fifth cycle is reduced by 20% when compared with the first cycle. The results show that the biomass was a capable sorbent for the removal of CR9. |
| Databáze: | OpenAIRE |
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