Influence of washing treatment on the qualities of heavy metal–contaminated soil

Yi, Yong Min; Sung, Kijune

doi:10.1016/j.ecoleng.2015.04.034

Cited by 44 publications

(25 citation statements)

References 33 publications

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“…LTTD also had a positive effect on plant germination and growth as well as on earthworm growth in TPH-contaminated soil. Therefore, LTTD could be a better alternative to other harsh remediation methods that showed deterioration of soil fertility and ecological soil functions (Laurent et al 2012;Yi and Sung 2015). However, ecological indicators still showed some differences to the non-contaminated soil level and ecological functions of soil need to be improved to achieve better soil quality.…”

Section: Overall Soil Health Changementioning

confidence: 95%

“…After inoculation, 1 mL of diluted sample was spread on a plate and incubated at 37°C for 24 h. This gave the number of colony-forming units per gram of dry soil (CFU/g). The activities of the enzymes dehydrogenase (DHA), β-glucosidase, acid phosphatase, and arylsulfatase were also determined (Lee and Sung 2014;Yi and Sung 2015). DHA was determined using 2,3,5-triphenyltetrazolium chloride (TTC) as a substrate and measuring the intensity of the reddish color of triphenyl formazan (TPF) release at 485 nm using a spectrophotometer (Shimadzu, Japan) after incubation for 24 h at 37°C).…”

Section: Ecological Properties Of Soilmentioning

confidence: 99%

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Changes in Ecological Properties of Petroleum Oil-Contaminated Soil After Low-Temperature Thermal Desorption Treatment

Park

Munster

et al. 2016

Water Air Soil Pollut

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Effects of low-temperature thermal desorption (LTTD) treatment on the ecological properties of soil contaminated by petroleum hydrocarbons were assessed. For this purpose, various ecological properties related to soil health and physicochemical properties of the oil-contaminated soil before and after LTTD treatment were investigated. Total petroleum hydrocarbon concentration, electrical conductivity, organic matter, and total nitrogen decreased while water-holding capacity and available P 2 O 5 increased. The soil color was also changed but textural class was not changed after LTTD. The microbial number and dehydrogenase activity increased following LTTD, but there was no significant difference in the β-glucosidase and acid phosphatase activities. Seed germination succeeded after LTTD, but the germination rate was still lower than that in noncontaminated soil as the growth of plants and earthworms was. The results showed that overall soil health related to biological productivity and environmental functions was improved after LTTD and suggested that LTTD could be a better alternative to other harsh remediation methods. However, ecological indicators still show differences to the adjacent non-contaminated level. Therefore, to ensure safe soil reuse, the change in eco-physiochemical properties as well as contaminant removal efficiency during the remediation process should be considered.

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Section: Overall Soil Health Changementioning

confidence: 95%

Section: Ecological Properties Of Soilmentioning

confidence: 99%

Changes in Ecological Properties of Petroleum Oil-Contaminated Soil After Low-Temperature Thermal Desorption Treatment

Park

Munster

et al. 2016

Water Air Soil Pollut

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“…Lime based materials increase pH which reduces metal mobility while other inorganic amendments such as vermiculite and zeolite provide surfaces for adsorption of HMs. A recent study has shown that pH change-induced soil immobilization (dolomite, steel slag, and lime) was more effective than sorption agents (zeolite and compost) in reducing plant uptake of Cd Yi and Sung, 2015 [181] and Pb in rice grains grown in a contaminated paddy soil [146].…”

Section: Strategies For Reducing Bioavailability Of Metal(loid)s In Cmentioning

confidence: 99%

“…Soil washing is able to permanently remove contaminants from contaminated soil and contaminants can be recycled from washing solution [180]. However, the physicochemical properties of soil may change after physical separation and chemical extraction processes, which may eventually lead to a decline in soil fertility [181].…”

Section: Strategies For Reducing Bioavailability Of Metal(loid)s In Cmentioning

confidence: 99%

Metal (Loid)s in Farmland Soils and Strategies to Reduce Bioavailability

Fayiga¹,

Nwoke²

2017

Open J Environ Biol

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High concentrations of heavy metal (loid)s (HMs) in farmland soils reduces crop yield and contaminates the food chain. Exposure to HMs in the diet results in several adverse health effects such as cancer, reproductive health problems and cardiovascular diseases. Understanding the origin and fractionation of these toxic substances will provide direction for reducing their bioavailability in contaminated farmland soils. HMs are added to farmland soils through activities such as irrigation, organic and inorganic fertilization, pest control, and mining. Weathering of parent material and atmospheric deposition can also increase the levels of HMs in the soil. Fractionation of HM contaminated soils provides information on availability of HMs such as Pb, Cd, As, Cr and Cu to soil biota and plants. Several studies have reported that Pb is mostly associated with Fe and manganese oxides (reducible fraction) while Cd is mostly associated with the most mobile fraction (exchangeable fraction). The application of organic and inorganic soil amendments such as vermiculite, zeolite, composts and crop residue to contaminated farmland soils converts HMs from the plant available fractions to the less mobile fractions. HM resistant microbes can change HMs to a less mobile fraction or less mobile oxidation state. The combination of HM resistant microbes, HM tolerant plants, and soil amendments can be used to reduce mobility of HMs in contaminated farmlands. Capsule:The mobility of heavy metal (loid)s in polluted farmland soils depends strongly on its association with soil components.

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“…Compared to completely removal of PHCs from OBDCs, optimal treatment conditions for LTTD will be more beneficial and can maximally keep soil health. Therefore, LTTD could be a better alternative to other remediation methods (e.g., Fenton reaction and soil washing treatment) that deteriorated soil fertility and ecological soil functions (Laurent et al, 2012;Yi and Sung, 2015).…”

Section: Research Summarymentioning

confidence: 99%

Remediation of oil-based drill cuttings using low-temperature thermal desorption

Liu¹

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Drill cuttings are generated during the exploration and extraction of oil and natural gas. Due to the use of oil-based muds (OBMs) during drilling process, large amounts of oil-based drill cuttings (OBDCs) are produced. Such hazardous waste contains a relatively high content of petroleum hydrocarbons (PHCs). The effective removal of PHCs from OBDCs has attracted ix Acknowledgement This thesis reflects the final part of achievements that I have made in my M.Sc. study at the University of Northern British Columbia (UNBC). First and foremost, I would like to express my sincere gratitude to my co-supervisors, Prof. Jianbing Li and Prof. Min Zhao, for their patience, understanding, insightful instructions, and support throughout my study and research. Without their guidance and support, it would be impossible for me to complete this research. What I have learned from them will benefit my future career and life. Moreover, I would like to thank Prof. Ronald W. Thring for serving as my supervisory committee member. I greatly appreciate his insightful comments, guidance and discussions. I would like to express my appreciation to Erwin Rehl and Charles Bradshaw working in Northern Analytical Laboratory Service (NALS) at UNBC for their patience and help on developing and refining my analytical methods as well as on analyzing my experimental samples. I also thank Conan Ma working at UNBC Chemstore for his support with sample delivery and lab materials supply. Special thanks go to Prof. Joselito M. Arocena, a great soil scientist, who was my previous committee member. I am grateful to his kind guidance and help to my graduate study and life. My gratitude also extends to the people in my lab group for their helps, valuable discussions and every joyful moment; they are Guangji Hu and Yuan Tian. Their kind sharing knowledge, skills and thoughts helped me a lot for the completion of this thesis. Finally, I would like to dedicate this work to my family, my parents, grandma and my older sister, for their unconditional supports and understanding. Without their supports and encouragement, I would not have come to UNBC and complete my Master's degree.

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Influence of washing treatment on the qualities of heavy metal–contaminated soil

Cited by 44 publications

References 33 publications

Changes in Ecological Properties of Petroleum Oil-Contaminated Soil After Low-Temperature Thermal Desorption Treatment

Changes in Ecological Properties of Petroleum Oil-Contaminated Soil After Low-Temperature Thermal Desorption Treatment

Metal (Loid)s in Farmland Soils and Strategies to Reduce Bioavailability

Remediation of oil-based drill cuttings using low-temperature thermal desorption

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