Toxicity identification and evaluation of a refinery wastewater from Brazil (Phase I)

Daflon, Sarah Dario Alves; Reynier, Marcia Vieira; Botta, Clarice R; Campos, Juacyara Carbonelli

doi:10.5132/eec.2015.01.07

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…It contains a high concentration of toxic recalcitrant substances originating from the composition of the refining crude oil and hence a serious cause of pollution to the receiving environmental ecosystem (Pal, et al 2016). Studies have shown that the pollutants that are most responsible for living tissue toxicity are; ammonia, Sulfide, cyanide, phenols and hydrocarbons (Daflon, 2015). The contaminants are usually toxic and a major threat to the environment and human health due to their solubility and long accumulation period in living tissues and environmental substrates (Rahi, et al (2021; Al-Khalid and El-Naas, 2018;) For example, compounds like phenols which is highly soluble in water can be detected from few concentrations up to 7000 mg/L from a PRWW composition.…”

Section: Introductionmentioning

confidence: 99%

Recent Advancement in the Treatment of Petroleum Refinery Wastewater

Lawan,

Kumar,

Rashid

et al. 2023

Preprint

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The treatment of petroleum refinery wastewater (PRWW) is of great interest in the field of industrial wastewater management. The wastewater contains a diverse concentration of contaminants such as oil and grease, petroleum hydrocarbons, phenol, ammonia, sulfides, as well as other organic and inorganic composites etc. The treatment of refinery wastewater has been treated through various processes including; physical, biological, chemical or hybrid methods which combine two or more techniques. Hence, the objective of this review is to summarize the recent research studies applied in the treatment of petroleum refinery wastewater using conventional, advanced as well as integrated treatment techniques. Furthermore, critically highlight the efficiencies and major limitations of each technique as well as prospects for improvement. Several conventional treatment techniques (basically, the physicochemical and biological processes) were discussed. In this context, advanced oxidation processes (AoPs) especially electrochemical oxidation and photocatalysis as well as the integrated/hybrid processes are found effective to remove the recalcitrant fraction of organic pollutants because of their various inherent mechanisms. These techniques could effectively remove COD and phenols concentration with an average removal efficiency exceeding 90%. Hence, the review also presented an elaborate discussion of the photocatalytic process as one of the advanced techniques and highlighted some basic concepts to optimize the degradation efficiency of a photocatalyst. Finally, a brief recommendation for research prospects is also presented.

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Section: Introductionmentioning

confidence: 99%

Recent Advancement in the Treatment of Petroleum Refinery Wastewater

Lawan,

Kumar,

Rashid

et al. 2023

Preprint

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“…Moreover, during the petroleum refining process, raw crude oil is converted into various useful end products such as gasoline, diesel fuel, kerosene, and fuel oils. Purification of crude oil utilizes huge volumes of water which causes the generation of wastewater enriched with toxic organic compounds [2,3]. Treatment of such wastewater is very essential to achieve safe environmental water quality standards before discharge into any water body [4,5].…”

Section: Introductionmentioning

confidence: 99%

Cyperus laevigatus L. Enhances Diesel Oil Remediation in Synergism with Bacterial Inoculation in Floating Treatment Wetlands

et al. 2020

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Diesel oil is considered a very hazardous fuel due to its adverse effect on the aquatic ecosystem, so its remediation has become the focus of much attention. Taking this into consideration, the current study was conducted to explore the synergistic applications of both plant and bacteria for cleaning up of diesel oil contaminated water. We examined that the application of floating treatment wetlands (FTWs) is an economical and superlative choice for the treatment of diesel oil contaminated water. In this study, a pilot scale floating treatment wetlands system having diesel oil contaminated water (1% w/v), was adopted using Cyperus laevigatus L and a mixture of hydrocarbons degrading bacterial strains; viz., Acinetobacter sp.61KJ620863, Bacillus megaterium 65 KF478214, and Acinetobacter sp.82 KF478231. It was observed that consortium of hydrocarbons degrading bacteria improved the remediation of diesel oil in combination with Cyperus laevigatus L. Moreover, the performance of the FTWs was enhanced by colonization of bacterial strains in the root and shoot of Cyperus laevigatus L. Independently, the bacterial consortium and Cyperus laevigatus L exhibited 37.46% and 56.57% reduction in diesel oil, respectively, while 73.48% reduction in hydrocarbons was exhibited by the joint application of both plant and bacteria in FTWs. Furthermore, microbial inoculation improved the fresh biomass (11.62%), dry biomass (33.33%), and height (18.05%) of plants. Fish toxicity assay evaluated the effectiveness of FTWs by showing the extent of improvement in the water quality to a level that became safe for living organisms. The study therefore concluded that Cyperus laevigatus L augmented with hydrocarbons degrading bacterial consortium exhibited a remarkable ability to decontaminate the diesel oil from water and could enhance the FTWs performance.

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