Two liquid phase partitioning bioreactor system for toxicant free water production from phthalates contaminated aqueous medium

Kanaujiya, Dipak Kumar; Pakshirajan, Kannan

doi:10.1016/j.jclepro.2022.134428

Cited by 6 publications

(1 citation statement)

References 39 publications

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“…PAEs degraded samples were centrifuged at 8000 × g for 10 min, and supernatant was assessed for phytotoxicity. Cicer arietinum L. (Chickpea seeds) germination and their growth is very sensitive toward toxic compounds like phthalates; therefore, it is selected for this toxicity analysis [ 34 ]. Chickpea seeds were placed on separate petri plates and 20 mL of distilled water, tap water, raw/untreated PAEs, and degraded PAEs were added individually to each plate.…”

Section: Materials and Methodologymentioning

confidence: 99%

Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses

Kanaujiya

Chhantyal

et al. 2023

Bioengineered

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Phthalic acid esters (PAEs) are highly toxic compounds and can disrupt the hormonal balance of human, animal, and aquatic organisms. Due to the hazardous nature of such compounds, their removal from constituent wastewater before discharging into the environment is mandatory. This study focused on the biodegradation of dimethyl phthalates (DMP), di-n-butyl phthalates (DBP), and di-n-octyl phthalates (DnOP) by Gordonia sp. in a batch system. Initially, five different concentrations of DBP, DMP, and DnOP (200–1000 mg/L) were chosen individually as the sole carbon source to examine their effect on the biodegradation and biomass growth of Gordonia sp. Complete degradation of DBP and DMP was achieved up to 1000 mg/L initial concentration within 96 h, whereas in case of DnOP, the degradation value was only 83.5% at 120 h for the same initial concentration. The experimental data were fitted into various substrate inhibition kinetic models, and accurate predicted values of degradation of all the three PAEs were obtained using the Tiesser model in comparison with other models, which yielded the highest and lowest R 2 and SSE values of 0.99 and 0.02 × 10 −4 , respectively. In addition, the phytotoxicity of PAEs degraded samples was assessed and more than 50% germination index value was observed for DMP and DBP degraded sample which established the treatment efficiency of Gordonia sp. in degrading DMP and DBP. Hence, high DMP and DEP degradation and phytotoxicity removal efficiency of Gordonia sp. demonstrate its potential for the treatment of PAEs contaminated wastewater.

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Section: Materials and Methodologymentioning

confidence: 99%