Physicochemical characterisation of petroleum hydrocarbon contaminated land of Guru Gobind Singh refinery’s peripheral area, Punjab

Petroleum hydrocarbons are a critical environmental contaminant and pose a serious hazard to the living system as petroleum hydrocarbons are identified as carcinogenic and neurotoxic organic pollutants. Therefore, remedial methods are required to dispose of it. With a modern understanding of nature and microorganisms, bioremediation is the preferred method for soil pollution control. However, before the implementation of successful bioremediation technology, it is required to assess various physico-chemical parameters of contaminated soil. In the present study, various physico-chemical parameters, including pH, electrical conductivity, water holding capacity, organic carbon, organic matter, available nitrogen, carbonate, bicarbonate, potassium and sodium contents of the petroleum hydrocarbon contaminated soil were estimated. The results suggested a rise in all the estimated parameters for the petroleum hydrocarbon-contaminated soil.

Download Full-text

Effects of surfactants on the remediation of petroleum contaminated soil and surface hydrophobicity of petroleum hydrocarbon degrading flora

Environmental Engineering Research ◽

10.4491/eer.2020.384 ◽

2020 ◽

Vol 26 (5) ◽

pp. 200384-0

Author(s):

Jianbo Liu ◽

Liming Xu ◽

Feifei Zhu ◽

Shouhao Jia

Keyword(s):

Contaminated Soil ◽

Petroleum Hydrocarbons ◽

Petroleum Hydrocarbon ◽

Initial Conditions ◽

Removal Rate ◽

Surface Hydrophobicity ◽

Orthogonal Experiments ◽

Petroleum Contaminated Soil ◽

Application Potential ◽

High Removal Rate

It has been proven that surfactants used in the remediation of petroleum hydrocarbon contaminated soil have great application potential. In this study, the effects of five surfactants (SDBS, Tween80, Tween60, rhamnolipid and TRS-1) on leaching of petroleum hydrocarbons from soil were investigated through orthogonal experiments, and petroleum hydrocarbon components were analyzed by GC/MS. The effects of surfactants on the degradation of petroleum hydrocarbon were analyzed by the changes of microbial growth curve and surface hydrophobicity. The results showed that surfactant type, temperature and surfactant concentration had significant effects on the removal rate of petroleum hydrocarbon. Tween80, rhamnolipid and TRS-1 have good bio-friendliness and a high removal rate of petroleum hydrocarbons (up to 65%), suitable for the restoration of the soil used in the experiment And Surfactants exhibited a higher removal rate for small molecules and petroleum hydrocarbons with odd carbon atoms. Surfactants have a certain modification effect on the surface of relatively hydrophilic bacteria under the initial conditions, making their surface properties develop in the direction of enhanced hydrophobicity, and the hydrophobicity has increased from less than 20% to about 40%.

Download Full-text

Phytoremediation of hydrocarbon-contaminated soils with emphasis on the effect of petroleum hydrocarbons on the growth of plant species

Phytoprotection ◽

10.7202/000379ar ◽

2009 ◽

Vol 89 (1) ◽

pp. 21-29 ◽

Cited By ~ 41

Author(s):

Ravanbakhsh Shirdam ◽

Ali Daryabeigi Zand ◽

Gholamreza Nabi Bidhendi ◽

Nasser Mehrdadi

Keyword(s):

Plant Species ◽

Contaminated Soil ◽

Contaminated Soils ◽

Petroleum Hydrocarbons ◽

Petroleum Hydrocarbon ◽

Green Technology ◽

Hydrocarbon Contamination ◽

Total Petroleum Hydrocarbons ◽

Control Treatment ◽

Polluted Soils

To date, many developing countries such as Iran have almost completely abandoned the idea of decontaminating oil-polluted soils due to the high costs of conventional (physical/chemical) soil remediation methods. Phytoremediation is an emerging green technology that can become a promising solution to the problem of decontaminating hydrocarbon-polluted soils. Screening the capacity of native tolerant plant species to grow on aged, petroleum hydrocarbon-contaminated soils is a key factor for successful phytoremediation. This study investigated the effect of hydrocarbon pollution with an initial concentration of 40 000 ppm on growth characteristics of sorghum (Sorghum bicolor) and common flax (Linum usitatissumum). At the end of the experiment, soil samples in which plant species had grown well were analyzed for total petroleum hydrocarbons (TPHs) removal by GC-FID. Common flax was used for the first time in the history of phytoremediation of oil-contaminated soil. Both species showed promising remediation efficiency in highly contaminated soil; however, petroleum hydrocarbon contamination reduced the growth of the surveyed plants significantly. Sorghum and common flax reduced TPHs concentration by 9500 and 18500 mg kg‑1, respectively, compared with the control treatment.

Download Full-text

Fungal Diversity and Physico-chemical Parameters of Rhizospheric Soil from Banana Plantation Sites at Nagaland, India

Agricultural Science Digest - A Research Journal ◽

10.18805/ag.d-5274 ◽

2021 ◽

Author(s):

W. Temjen ◽

M.R. Singh ◽

T. Ajungla ◽

K.Z. Chophi ◽

K. Semy

Keyword(s):

Soil Fungi ◽

Soil Health ◽

Vital Role ◽

Dilution Method ◽

Chemical Parameters ◽

Available Nitrogen ◽

Physico Chemical ◽

Soil Temperatures ◽

Serial Dilution Method ◽

Banana Plantation

Background: Soil Fungi play a vital role in maintaining the soil health. Such Microbial communities offer stability and greater yield in agro-ecosystems. The current study was aimed to evaluate the diversity of rhizospheric fungi present in the Banana plantation site and estimate the values of the selected physico-chemical parameters of the soil.Methods: Soil samples were collected from the two selected sites i.e. Site MK and Site ZB, from Nagaland State, India During the month of October 2019. Soil temperatures, pH, Moisture, organic carbon and Available Nitrogen were measured by standard protocols. Fungi were isolated in Potato dextrose agar and Rose agar plates following serial dilution method. Plates were incubated at 25±1°C for 5-7 days. Fungal colonies were observed and transferred to appropriate identification media and identified with the help of literature.Result: A total of 19 different fungal isolates were recorded from the two sites. It was observed that the Genus Aspergillus was dominant in both the sites.

Download Full-text

Biostimulation-phytoremediation of petroleum hydrocarbon contaminated soil: Response surface methodology (RSM)

10.21203/rs.3.rs-360082/v1 ◽

2021 ◽

Author(s):

Jing Li ◽

Nian Ma ◽

Boyu Hao ◽

Feifei Qin ◽

Xiuxia Zhang

Keyword(s):

Response Surface ◽

Contaminated Soil ◽

Petroleum Hydrocarbons ◽

Petroleum Hydrocarbon ◽

Degradation Rate ◽

Single Factor ◽

Soil Response ◽

Plant Seeds ◽

Compound Fertilizer ◽

Ecological Remediation

Abstract In view of the analysis and remediation of petroleum hydrocarbon contaminated soil, the study on ecological technology of oilfield well site was carried out. The response surface was used to optimize the single-factor biological stimulation experiment of moisture content, the leavening agent content and the compound fertilizer content, and get the best experimental plan of biological stimulation. The artificial stimulation-plant combined remediation experiment was designed. Through screening 20 kinds of plant seeds suitable for growth, selected 5 plants with high tolerance to petroleum hydrocarbons. The artificial biostimulation-phytoremediation combined degradation experiment of petroleum hydrocarbons in contaminated soil was designed, and the degradation rate of petroleum hydrocarbons in soil under the optimal ecological remediation scheme was obtained. It was found that petroleum hydrocarbons degradation rate in soil after 70 days artificial stimulation experiment was 28.6%. Through the screening of 20 plants, peanut had the highest tolerance to petroleum hydrocarbons in soil, and the degradation rate in 70 days soil reached 31.1%. After 70 days of biostimulation-phytoremediation, the degradation rate in soil reached 38.9%.

Download Full-text