Fenton oxidation system for treating petroleum-contaminated solid waste: Advances and prospects.

Both normal activities and accidental spills in the petroleum industry generate solid waste that contain petroleum-contaminated pollutants (referred to as "petroleum-contaminated solid waste"), which mainly include petroleum-contaminated soil, petroleum sludge, and petroleum-based drill cuttings. At present, most relevant studies focus solely on the treatment effects of the Fenton system alone in treating a specific type of petroleum-contaminated solid waste, and systematic studies on the influencing factors, degradation pathways, and applicability of the system are lacking. For this reason, this paper reviews the application and development of the Fenton system to treat petroleum-contaminated solid waste in the period from 2010 to 2021 and summarizes its basic properties.

Degradation of petroleum pollutants in oil-based drilling cuttings using an Fe-based Fenton-like advanced oxidation processes.

Oil-based drilling cuttings (OBDC) contain a large amount of total petroleum hydrocarbon (TPH) pollutants, which are hazardous to the environment. In this study, Fe-activating hydrogen peroxide (Fe/HO), peroxymonosulfate (Fe/PMS), and peroxydisulfate (Fe/PDS) advanced oxidation processes (AOPs) were used to treat OBDC due to the difference in the degradation capacity of TPH caused by the type of free radical generated and effective activation conditions observed for the different oxidants studied. The results showed that the oxidant concentration, Fe dosage, and reaction time in the three AOPs were greatly positively correlated with the TPH removal rate in a certain range.

An assessment of the UV/nFe /H O system for the removal of refractory organics in the effluent produced by the biological treatment of landfill leachate.

The removal efficiency and mechanism of the ultraviolet/nanoscale Fe /H O (UV/nFe /H O ) system for refractory organics in membrane bioreactor effluent were investigated. The most effective removal of organics was achieved at initial pH = 3.0, H O dosage = 50 mM, nFe dosage = 1.

Removal of total petroleum hydrocarbons from oil-based drilling cuttings by a heat activation persulfate-based process.

Oil-based drilling cuttings (OBDC) are typical hazardous wastes generated during shale gas extraction. In this study, two persulfate-based advanced oxidation processes (AOPs), heat/PMS and heat/PDS, have been used to treat OBDC. The results showed that for the heat/PMS process, within a certain range, the oxidant dosage, temperature, and reaction time were significantly positively correlated with the degree of total petroleum hydrocarbon (TPH) removal.

Enhanced performance and mechanism of the combined process of ozonation and a semiaerobic aged refuse biofilter for mature landfill leachate treatment.

A semiaerobic aged refuse biofilter (SAARB) can effectively treat mature landfill leachate (ML), but prolonged operation can lead to the enrichment of pollutants in the biofilter, resulting in severely degraded treatment performance. In this study, we constructed a combination process of ozonation and a SAARB to treat ML based on the principles of selective oxidation of aromatic organics by ozone and the preference of microorganisms for ozonation products. The results showed that the removal of organic and nitrogen pollutants became extremely poor after long-term treatment of ML using the SAARB alone.

Combination of coagulation, Fe/HO and ultra-high lime aluminium processes for the treatment of residual pollutants in biologically-treated landfill leachate.

Refractory substances (humus) and salts (chloride (Cl) and sulphate (SO) ions) remain in the biotreated landfill leachate treatment, and it is necessary to carry out further treatments by a suitable method before discharge. In this study, the effect and operational mechanism of a combination of the coagulation Fe/HO and ultra-high lime aluminium (UHLA) processes for the treatment of refractory organic substances and salts in the leachate effluent of a semi-aerobic aged refuse biofilter (SAARB) were investigated. The results showed that polyferric sulphate is a relatively efficient coagulant comparing to FeCl, Al(SO), and polyaluminium chloride.

Regional distribution, properties, treatment technologies, and resource utilization of oil-based drilling cuttings: A review.

Oil-based drilling cuttings (OBDC) are hazardous wastes produced during the extensive use of oil-based drilling mud in oil and gas exploration and development. They have strong mutagenic, carcinogenic, and teratogenic effects and need to be properly disposed of to avoid damaging the natural environment. This paper reviews the recent research progress on the regional distribution, properties, treatment technologies, and resource utilization of OBDC.