Evaluation of the phytoremediation potential of Moringa oleifera in the treatment of effluents from the petroleum industry

Avaliação do potencial de fitorremediação da Moringa oleífera no tratamento de efluentes da indústria de petróleo

Autores

Ana Soares de Oliveira Universidade Estadual do Rio Grande do Norte https://orcid.org/0000-0003-4924-5298
Regina Celia Pereira Marques Universidade Estadual do Rio Grande do Norte https://orcid.org/0000-0002-5172-0441
Wyllame Carlos Gondim Fernandes Instituto Federal do Ceará

Palavras-chave:

Flocculation, Ecotoxicity, Oil and grease content, Aluminum sulfate

Resumo

Industrial growth generates waste, where produced water (PW) poses a challenge due to its chemical complexity. Concerns about potential health effects, including a link to Alzheimer's disease, arise with flocculants like aluminum sulfate. Studies indicate that Moringa oleifera seeds have coagulation activity. Thus, this study aimed to compare the oil/water removal efficiency of PW through flocculation between aluminum sulfate and M. oleifera seed-based coagulants in saline and aqueous media. The synthetic matrix was treated with these flocculants, revealing a notable reduction in oil and grease levels (TOG), especially with saline extracts showing removal above 69%, notably Moringa purified + NaCl exhibiting substantial potential, second only to aluminum sulfate. Additionally, in total solids analysis, the saline extract of purified seeds achieved 67% removal of T.S, while the commercial counterpart reached 72%. Toxicity analysis on Artemia salina indicates that M. oleifera treatments resulted in over 50% mortality, yet exhibited reduced toxicity compared to synthetic matrix (petroleum) and aluminum sulfate.

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