Effect of Oil Shale Ash Application on Leaching Behavior of Arable Soils: An Experimental Study

Adamson, Jasper; Irha, Natalya; Adamson, K.; Steinnes, E.; Кирсо, У.

doi:10.3176/oil.2010.3.06

Cited by 17 publications

(13 citation statements)

References 21 publications

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“…In the latter case it is important to note that the direct contact of fly ash with soils matrix may considerably decrease the bioavailability of trace metals [48]. Indeed, our test results also showed that even short-term contact of PF-E 1:10 eluates with soil significantly reduced its toxicity to D. magna (data not shown).…”

Section: Biotesting Of Eluatesmentioning

confidence: 69%

Environmental hazard of oil shale combustion fly ash

Blinova

Bityukova

Kasemets

et al. 2012

Journal of Hazardous Materials

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Section: Biotesting Of Eluatesmentioning

confidence: 69%

Environmental hazard of oil shale combustion fly ash

Blinova

Bityukova

Kasemets

et al. 2012

Journal of Hazardous Materials

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“…De acordo com esses autores, a baixa concentração de metais tóxicos no XR propicia o seu uso como condicionador de solos, sem causar riscos. Adamson et al 24 26 são textura arenosa desde a superfície até um mínimo de 50 cm e um máximo de 100 cm de profundidade e horizonte B textural (conteúdo de argila maior em relação ao horizonte A) dentro de 200 cm do perfil do solo.…”

Section: Introductionunclassified

Avaliação da liberação de elementos traço em solos tratados com xisto retortado

Santos¹,

Presbiteris²,

Santos³

et al. 2017

Quim. Nova

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EVALUATION OF TRACE ELEMENTS RELEASING FROM SOILS TREATED WITH RETORTED OIL SHALE. Soils that had received successive applications of retorted oil shale (ROS) in an experiment under field conditions were used in this study, aiming to evaluate the availability of trace elements. In the batch tests, we observed that toxic elements present in the ROS are not desorbed from the matrix in significant amounts to contaminate soil and groundwater. The element Ca represents the greatest nutrient contribution, which has high mobility and ease release into the soil solution. Concerning the results obtained from the soil extracts analysis; we observed that the undesirable elements released into the extracts are not directly related to the presence of ROS in the soil samples. Comparing the behavior of soil samples with and without ROS it is possible to infer that many of the trace elements are derived from soil constituents, from previous fertilizer and pesticides applications. The study suggested that the ROS can be used as a soil conditioner for agricultural purposes without adding harmful elements to the environment.Keywords: soils; trace elements; retorted oil shale. INTRODUÇÃOO folhelho pirobetuminoso (xisto) é uma rocha sedimentar rica em querogênio, que é um composto orgânico de composição indefinida, gerado pela ação química e de microrganismos sobre a matéria orgânica ao longo de milhões de anos. 1 O Brasil possui a segunda maior reserva de xisto no mundo, sendo os Estados Unidos detentor das maiores reservas mundiais, 1,2 além de outros países que merecem destaque como Austrália, Canadá, China, Estônia, Itália, Jordânia, Marrocos, Rússia e Zaire. 3 Em São Mateus do Sul, no estado do Paraná, é explorada a extração de xisto da mais importante reserva de xisto do Brasil, a Formação Irati, a qual abrange também os estados de Mato Grosso do Sul, Goiás, São Paulo, Santa Catarina e Rio Grande do Sul. 3 A Unidade de Negócios da Industrialização do Xisto realiza a mineração e o processamento do xisto extraído neste local. O processamento do xisto produz óleo e gás em condições de alta temperatura e alta pressão, além de outros subprodutos, sendo um deles o xisto retortado (XR) produzido em grandes quantidades, representando cerca de 80 a 90% da quantidade de matéria prima inicial do processo. 1 O XR é uma matriz dependente de sua origem e do processo de extração de óleo e gás, e pode conter compostos orgânicos e elementos traços indesejáveis ao meio ambiente. A composição química e as características do XR têm sido objeto de estudo de vários países, variando conforme a região de origem. 1,4-10 Na matriz do XR estão presentes minerais tais como quartzo, feldspatos, argilas (principalmente ilita e clorita), carbonatos (calcita e dolomita), pirita e outros minerais. [11][12][13] Outros elementos químicos também estão presentes no XR como Fe, Al, Mg, Ca, K e P, em quantidades majoritárias, além de elementos em menores proporções como Mn, Zn, Ba, Pb, Mo, Cu, Ni, Cr, Co e Cd, entre outros. As quantidades relativas de cada elemento...

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“…Agitated mixtures resulted in slight leaching of these metals in the present case [5]. Leaching conditions are very important [11].…”

Section: Heavy Metals Leachabilitymentioning

confidence: 59%

Leachability of Oil Shale Ash from Isfir Al-Mahata Oil Shale, Southern Jordan

Alnawafleh¹,

Al-Harahsheh²,

Al-Harahsheh³

2016

JMMCE

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This paper presents the first study on the oil shale (OS) ashing and OS ash leachability of Jordanian OS located further in the south. The studied OS is from Isfir Al-Mahata subsurface OS located 10 km south of Ma'an. Chemical and physical characterization of the OS ash was performed and compared with original OS. Ashing OS was conducted at different temperatures. Important parameters affecting OS ash leachability were also investigated. The leachability of certain heavy metals was investigated based on clear leaching protocol. The Fisher Assay analysis result indicates that this OS type has quite higher moisture content, lower oil content, and higher spent shale compared with other Jordanian oil shales. Ashing of OS at higher temperatures (950˚C) resulted in the disappearance of silica, due to its complete reaction with lime and Al, and formation of Anhydrite and cement materials like, Portland cement. The leachability analysis indicates that for most elements the leachability is high at low pH. The released heavy metals concentrations are below EPA limits. Chromium and lead are leached out more than other elements with the exception at low pH. In general, the higher the ashing temperature is, the lower the release of elements is. The chemical composition of the ash and the leachability results suggests that it has high fixing capacity toward the heavy metals present in the ash.

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Effect of Oil Shale Ash Application on Leaching Behavior of Arable Soils: An Experimental Study

Cited by 17 publications

References 21 publications

Environmental hazard of oil shale combustion fly ash

Environmental hazard of oil shale combustion fly ash

Avaliação da liberação de elementos traço em solos tratados com xisto retortado

Leachability of Oil Shale Ash from Isfir Al-Mahata Oil Shale, Southern Jordan

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