Removal of pentachlorophenol from contaminated wastewater using phytoremediation and bioaugmentation processes

Autor: Rim Werheni Ammeri, Khadija Kraiem, Khalifa Riahi, Saiefeddine Eturki, Wafa Hassen, Ines Mehri, Abdennaceur Hassen
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Water Science and Technology, Vol 84, Iss 10-11, Pp 3091-3103 (2021)
Druh dokumentu: article
ISSN: 0273-1223
1996-9732
DOI: 10.2166/wst.2021.328
Popis: The phytoremediation procedure was conducted by Lemna gibba (L) and Typha angustifolia (T) and the bioaugmentation procedure used P. putida HM627618. The ability of the selected P. putida HM627618 to tolerate and remove PCP (200 mg L−1) was measured by high performance liquid chromatography analysis and optical density at 600 nm. Five different experiments were conducted in secondary treated wastewater for PCP testing removal (100 mg L−1) including two phytoremediation assays (T + PCP; L + PCP), three bioaugmentation-phytoremediation assays (T + B + PCP; L + B + PCP; L + T + B + PCP) and a negative control assay with PCP. Various analytical parameters were determined in this study such as bacterial count, chlorophylls a and b, COD, pH and PCP content. The main results showed that the average PCP removal by P. putida HM627618 was around 87.5% after 7 days of incubation, and 88% of PCP removal was achieved by treatment (T + B) after 9 days. During these experiments, pH, COD and chloride content showed a net increase in all treatments. The chlorophylls a and b in case of (T) and (L) Chlorophylls a and b for T and L phytoremediation showed a decrease with a value less than 10 μg/mg of fresh material after 20 days of cultivation. HIGHLIGHT The use of macrophytes with two categories: aquatic fixed and floating models to treat polychlorinated pollutants from wastewater. This study evaluated the efficiency of Lemna gibba and Typha angustifolia to remove pentachlorophenol from aqueous solution further, and the combined process of phytoremediation and bioaugmentation efficacy in PCP removal by the plant.;
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