Assessing the Plant Phytoremediation Efficacy for Azolla filiculoides in the Treatment of Textile Effluent and Redemption of Congo Red Dye onto Azolla Biomass

Sathish Sundararaman, Ponnusamy Senthil Kumar, Prabu Deivasigamani, Aravind Kumar Jagadeesan, Marshiana Devaerakkam, Abdulrahman Al-Hashimi and Dongjin Choi
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Sathish Sundararaman: Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, India
Ponnusamy Senthil Kumar: Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai 603110, India
Prabu Deivasigamani: Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, India
Aravind Kumar Jagadeesan: Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, India
Marshiana Devaerakkam: Department of Electronics and Instrumentation Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, India
Abdulrahman Al-Hashimi: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Dongjin Choi: Department of Materials Science and Engineering, Hongik University, 2639-Sejong-ro, Jochiwon-eup, Sejong 30016, Korea

Sustainability, 2021, vol. 13, issue 17, 1-20

Abstract: 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 (R 2 = 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 (R 2 = 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.

Keywords: phytoremediation; Azolla filiculoides; adsorption; kinetics; toxic pollutants (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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