Abstract The outcome of different processes in oil refineries is production of hazardous wastes containing toxic and hardly degradable compounds. Use of chemical processes before bioremediation for faster degradation of heavy and hardly biodegradable compounds can be a solution to enhance the degradability of oily sludge. Thus, the aim of the present study is to investigate the efficiency by ...
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A Ciboria sp. strain (Phylum Ascomycota) was isolated from hydrocarbonpolluted soil of an abandoned oil refinery in Italy. The strain was able to utilize diesel oil as a sole carbon source for growth. Laboratoryscale experiments were designed to evaluate the use of this fungal strain for treatment of the polluted soil. The concentration of total petroleum hydrocarbons (TPH) in the soil was ...
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The present study reports the level of total petroleum hydrocarbon (TPH) in 27 commercially important fish, crustaceans and cephalopods from Orissa coast, Bay of Bengal to provide the baseline data for oil contamination in marine biota. The results showed significant differences in the TPH concentra .
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Oxidative stress in petroleumcontaminated soils. Changes in the MDA contents of the plant leaves exposed to soil contaminated by different TPH levels are shown in Fig. 1 b. The MDA levels increased significantly as the TPH concentration increased from to g kg − addition, the MDA contents of the three plant species exhibited similar responses over time.
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Key to the riskbased assessment of TPH in vapor intrusion investigations is the assignment of inhalation toxicity factors or "Reference Concentrations (RfC)" to individual, volatile carbon ranges. A summary of published inhalation toxicity factors for carbon ranges is presented in Table 4. Lower RfCs reflect progressively increasing ...
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Initial TPH values in the molasses treatment were 69,529 mg/kg which decreased to 41,767 mg/kg at week 15 (Figure 1(a)), a removal removal rate of 40%.Molasses is enriched with various simple sugars (sucrose, glucose, and fructose); basic oxides (, K 2 O, CaO, and MgO); vitamins (B 1, B 2, and B 6); and several acids [] and, therefore, serves as a source of readily available nutrients for ...
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Concentrations (RfCs) for Total Petroleum Hydrocarbons (TPH)(1997, Amherst Scientific Publishers) provides the technical basis for the development of TPH fractionspecific RfDs and RfCs for use in the hazard assessment step of the Working Group's riskbased approach to establishing soil cleanup levels at petroleum contaminated sites. Volume 5.
WhatsApp: +86 18203695377![Guidance for Assessing Petroleum Hydrocarbons in Soil [PDF]](/zt4f2sg/207.jpg)
(2) Total petroleum hydrocarbons (TPH) (TPHgasoline range organics (G), TPHdiesel range organics (D), and/or TPHoil range organics (O)) and (3) Evaluate TPH soil saturation concentrations. The indicator compounds required for analysis are dependent on the source of the petroleum product and are summarized in Table 1.
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For the generation of SS and RS for TPHGRO, TPHDRO, and TPHORO for Tables 1, 2, and 3, the aliphatic or aromatic fraction with the most protective RfD was used to represent the entire TPH mixture [gasoline (TPHGRO), diesel (TPHDRO), and oil (TPHORO)] was represented. TPHGRO is represented by the RfD for Aromatics C>8
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For successful soil remediation and hydrocarbon exploration operations, determining the total petroleum hydrocarbon (TPH) content of soils is an indispensable process step. This paper reports on the performance of a handheld Fourier transform nearinfrared (FTNIR) spectrometer for rapid and quantitative determination of TPH content of soils from two different sites by diffuse reflection ...
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Petroleum products can be made up of hundreds of individual petroleum hydrocarbons. TPH is a value that represents the amount of petroleum hydrocarbons in a given sample, as previously presented in Section There are far more than 250 individual chemicals that are known as petroleum hydrocarbons and there is an inherent complexity involved in chemically and physically describing and ...
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The optimization of the washing conditions, such as stirring speed, liquidsolid ratio, number of washing stages, and surfactant concentration, was carried out using a design of experiments (DOE) software, so that the maximum extraction efficiency of total petroleum hydrocarbons (TPHs) was achieved. A TPH removal efficiency of ( ± ...
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A highefficient method for determining the total petroleum hydrocarbon (TPH) was established by gas chromatographyflame ionization detection, coupled with an efficient 10 m short chromatographic column; the analyzing period was narrowed to 5 mins. The limits of detection of the method included,, and mg/kg, and the corresponding limits of quantification reached,, and ...
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Although methods for evaluating TPH risks in soil and groundwater are relatively routine, TPH is not generally addressed in PVI risk assessments (Bowers Smith 2014).Only the US Environmental Protection Agency (US EPA 2015b), a few US states (HI, LA, MA, MO, OR and WA) and Australia have vapour intrusion screening criteria (soilgas RBSLs) for TPH fractions or total (bulk) TPH (see Table 1).
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The biodegradation efficiency of total petroleum hydrocarbon (TPH) was increased from % in the contaminated soil to % and % in isolated consortium and isolated consortium g sophorolipid (SL)/kg dry soil, respectively. The halflife of TPH degradation process was decreased from d in the isolated consortium reactor to ...
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Prior to the application of OBM, BTEX and TPH concentrations were analyzed. Total petroleum hydrocarbons were extracted with hexane at 1:10 solids: solvent ratio, plus addition of g Na 2 SO 4 for 5 minutes on a reciprocating shaker followed by centrifugation for 10 minutes. Five mL of the resulting supernatant was equilibrated for 2 minutes ...
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1. Introduction. In recent years, petroleum hydrocarboncontaminated soils have become a serious environmental problem (Gielnik et al., 2019; Lu et al., 2014; Song et al., 2019).The concentration of total petroleum hydrocarbon (TPH) in soil has been reported to be as high as 44,600 mg/kg dry soil (Wu et al., 2016; Khudur et al., 2019).TPH is consisted of different materials such as aliphatic ...
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The effects of soil microparticles and micropores on the release of total petroleum hydrocarbons (TPH) were investigated using longterm weathered, TPHcontaminated soil samples. The TPH concentrations were analyzed using various extraction schemes (, total extraction, weak extraction, solvent extraction with or without ultrasound). The particle size distribution (<2 mm, mm, <0 ...
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Total petroleum hydrocarbons ( TPH) is a term used for any mixture of hydrocarbons that are found in crude oil. There are several hundred of these compounds, but not all occur in any one sample. Crude oil is used to make petroleum products, which can contaminate the environment.
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Degradation of total petroleum hydrocarbons in soil using potassium permanganate. This study investigated the effectiveness of PP on the degradation of soil TPH by either solution pouring (PP solution) or spraying (PP ) onto the surface of dieselcontaminated unsaturated soil. In comparing the two methods, the same volume ( PV) of ...
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Alkanes and PAH are the two fractions of TPH. The changes of the concentrations of alkanes and PAH during bioremediation of the oilcontaminated soil are shown in Fig. 8 weeks of incubation, alkane concentrations decreased from 15400 ± 130 to 12300 ± 420, 12200 ± 360, 7200 ± 280, and 6160 ± 250 mg kg −1 soil in the CK, WHC, BS, and BA treatments, respectively.
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Oilbased drilling cuttings (OBDC) contain a large amount of total petroleum hydrocarbon (TPH) pollutants, which are hazardous to the environment. In this study, Fe2+activating hydrogen peroxide (Fe2+/H2O2), peroxymonosulfate (Fe2+/PMS), and peroxydisulfate (Fe2+/PDS) advanced oxidation processes (AOPs) were used to treat OBDC due to the difference in the degradation capacity of TPH caused by ...
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TPH and PAHs were significantly degraded in all treatments (72 to 79% and 83 to 87%, respectively), and the biodegradation values were higher when nutrients were not added, especially for benzo(a)anthracene and chrysene. The moisture content and aeration were determined to be the key factors associated with PAH bioremediation.
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The contamination of soil with total petroleum hydrocarbons (TPH) may result in dramatic consequences and needs great attention, as soil rehabilitation would need more effort from a sustainability perspective. However, there is still no known general method since the remediation technology is strictly sitespecific. Adaptive biological system ...
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In this review, studies on petroleum sludge composting have been investigated in the aim to understand the sludge biotransformation and highlighting the points that need more attention. Total petroleum hydrocarbons (TPH) are the major contaminants present in the petroleum sludge they ranged from to g/kg of dry matter, indicating a potential risk to the environment if not correctly ...
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Adewuyi et al. (Citation 2011) reported the mean concentration of total petroleum hydrocarbons in surface water as ± mg/L, which was higher than the reported concentrations in this study. Suratman (Citation 2013) reported the concentration of TPH on the surface river water ranged from to µg/L (mean ± µg/L). This ...
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Specific contaminants that are components of TPH, such as BTEX (benzene, toluene, ethylbenzene, and xylene), nhexane, jet fuels, fuel oils, and mineralbased crankcase oil, have been studied by ATSDR and a number of toxicological profiles have been developed on individual constituents and petroleum products.
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In the course of 18 months of remediation, total petroleum hydrocarbons values decreased in 99 and 88% on average for aliphatics and aromatics, respectively, indicating a successful biodegradation.
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Maximum TPH degradation could be observed in the set amended with XHN consortium and 30 mM nitrate (BSBAXHN). The initial TPH of 320 ± 25 g kg −1 was reduced to 46 g kg −1 in BSBAXHN setup and 112 g kg −1 in BSBAXLN. In anaerobic bioremediation setups (BAAHN and BSBAAHN), rate and extent of TPH degradation was inhibited (36% in 30 days).
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