Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça
Taking into account the environmental problem related to soil contamination by organic and inorganic compounds, which is caused by the improper disposal of effluents and waste or accidental spills from the textile, food, agricultural and oil industries, there is a great need for them to be techno...
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Remediação eletrocinética Barreira reativa permeável Grânulos de cortiça Cromo hexavalente Compostos orgânicos CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
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Remediação eletrocinética Barreira reativa permeável Grânulos de cortiça Cromo hexavalente Compostos orgânicos CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA Andrade, Deborah Cordeiro de Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça |
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Taking into account the environmental problem related to soil contamination by
organic and inorganic compounds, which is caused by the improper disposal of effluents and
waste or accidental spills from the textile, food, agricultural and oil industries, there is a great
need for them to be technologies have been developed which can minimize the impact of this
pollution. This is a serious environmental issue, due to the high negative impact of heavy metals
contamination, such as hexavalent chromium, and organic compounds, such as diesel. One way
to reduce this impact is to apply remediation technologies to the soil, which promote the
removal of these contaminants in an effective, low-cost manner and which also does not lead
to new environmental problems. Aiming to provide new data on soils remediation, which are
contaminated with hexavalent chromium and diesel, separately, this thesis presents an
application study of electrokinetic technology combined with reactive permeable barrier of cork
granules. To increase the removal of pollutants, chelating agents and surfactants were added as
electrolytes. For electrokinetic remediation in soil contaminated with hexavalent chromium, the
barrier used was composed of virgin cork and the electrolytes were: distilled water, citric acid
(1 M), sodium chloride (0.1 M) and tap water. Although citric acid and sodium chloride presents
higher conductivity than distilled water, results showed a superior removal of total and
hexavalent chromium in EK-PRBa / DW-DW test, in which distilled water was added in the
electrode chambers and cork granules placed close to the anode (41.5% removal). In terms of
reduction, more than 82% of Cr (VI) was reduced to Cr (III) only by contact with the soil,
probably due to the high concentration of Fe2+ in the soil (> 6000 mg kg-1
). This behavior was
enhanced by the presence of citric acid, which further lowered the pH of the soil. The test in
which the sodium chloride was both electrolytes showed the lowest removal rate, probably due
to the decrease in the availability of its ions by the formation of salts and bases with cations
present in the soil matrix. For remediation in soil contaminated with diesel, the barrier used was
composed of black cork and the electrolytes applied were: tap water, sodium sulfate (0.05 M)
and sodium dodecyl sulfate (3.46 M). Results showed that, although SDS and Na2SO4 presents
more intensive effects on organic migration due to their affinity with oil and dissociate ions
with greater conductive capacity, compared with tap water, the test in which this electrolyte
was used promoted a better rate of diesel removal, reaching 85.3%. However, the application
of SDS and Na2SO4 also promoted satisfactory results (72.4%). |
| author2 |
Santos, Elisama Vieira dos |
| author_facet |
Santos, Elisama Vieira dos Andrade, Deborah Cordeiro de |
| format |
doctoralThesis |
| author |
Andrade, Deborah Cordeiro de |
| author_sort |
Andrade, Deborah Cordeiro de |
| title |
Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça |
| title_short |
Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça |
| title_full |
Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça |
| title_fullStr |
Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça |
| title_full_unstemmed |
Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça |
| title_sort |
estudo da remediação de solo contaminado com diesel ou cromo (vi) aplicando eletrocinética e barreira reativa permeável de cortiça |
| publisher |
Universidade Federal do Rio Grande do Norte |
| publishDate |
2022 |
| url |
https://repositorio.ufrn.br/handle/123456789/49554 |
| work_keys_str_mv |
AT andradedeborahcordeirode estudodaremediacaodesolocontaminadocomdieseloucromoviaplicandoeletrocineticaebarreirareativapermeaveldecortica AT andradedeborahcordeirode remediationstudyofcontaminatedsoilwithdieselorhexavalentechromiumbyapplyingelectrokineticsandpermeablereactivebarrierofcork |
| _version_ |
1797696437901852672 |
| spelling |
ri-123456789-495542024-03-19T04:02:13Z Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça Remediation study of contaminated soil with diesel or hexavalente chromium by applying electrokinetics and permeable reactive barrier of cork Andrade, Deborah Cordeiro de Santos, Elisama Vieira dos http://lattes.cnpq.br/8138189388355532 https://orcid.org/0000-0003-2189-5694 http://lattes.cnpq.br/8117747568545202 Soriano, Salvador Cotillas Vidal, Jorge Huitle, Carlos Alberto Martinez http://lattes.cnpq.br/2485073932883264 Araújo, Danyelle Medeiros de Remediação eletrocinética Barreira reativa permeável Grânulos de cortiça Cromo hexavalente Compostos orgânicos CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA Taking into account the environmental problem related to soil contamination by organic and inorganic compounds, which is caused by the improper disposal of effluents and waste or accidental spills from the textile, food, agricultural and oil industries, there is a great need for them to be technologies have been developed which can minimize the impact of this pollution. This is a serious environmental issue, due to the high negative impact of heavy metals contamination, such as hexavalent chromium, and organic compounds, such as diesel. One way to reduce this impact is to apply remediation technologies to the soil, which promote the removal of these contaminants in an effective, low-cost manner and which also does not lead to new environmental problems. Aiming to provide new data on soils remediation, which are contaminated with hexavalent chromium and diesel, separately, this thesis presents an application study of electrokinetic technology combined with reactive permeable barrier of cork granules. To increase the removal of pollutants, chelating agents and surfactants were added as electrolytes. For electrokinetic remediation in soil contaminated with hexavalent chromium, the barrier used was composed of virgin cork and the electrolytes were: distilled water, citric acid (1 M), sodium chloride (0.1 M) and tap water. Although citric acid and sodium chloride presents higher conductivity than distilled water, results showed a superior removal of total and hexavalent chromium in EK-PRBa / DW-DW test, in which distilled water was added in the electrode chambers and cork granules placed close to the anode (41.5% removal). In terms of reduction, more than 82% of Cr (VI) was reduced to Cr (III) only by contact with the soil, probably due to the high concentration of Fe2+ in the soil (> 6000 mg kg-1 ). This behavior was enhanced by the presence of citric acid, which further lowered the pH of the soil. The test in which the sodium chloride was both electrolytes showed the lowest removal rate, probably due to the decrease in the availability of its ions by the formation of salts and bases with cations present in the soil matrix. For remediation in soil contaminated with diesel, the barrier used was composed of black cork and the electrolytes applied were: tap water, sodium sulfate (0.05 M) and sodium dodecyl sulfate (3.46 M). Results showed that, although SDS and Na2SO4 presents more intensive effects on organic migration due to their affinity with oil and dissociate ions with greater conductive capacity, compared with tap water, the test in which this electrolyte was used promoted a better rate of diesel removal, reaching 85.3%. However, the application of SDS and Na2SO4 also promoted satisfactory results (72.4%). Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq Levando-se em consideração o problema ambiental relacionado à contaminação de solos por compostos orgânicos e inorgânicos, que é causada pelo descarte inadequado de efluentes e resíduos ou vazamentos acidentais provenientes das indústrias têxtil, alimentícia, agrícola e petrolífera, existe uma grande necessidade para que sejam desenvolvidas tecnologias as quais possam minimizar o impacto dessa poluição. Esta é uma questão ambiental séria, devido ao alto impacto negativo da contaminação de metais pesados, como o cromo hexavalente, e de compostos orgânicos, como o diesel. Uma forma de reduzir esse efeito consiste em aplicar tecnologias de remediação no solo, as quais promovam a remoção desses contaminantes de maneira efetiva, de baixo custo e que também não acarrete em novos problemas ambientais. Visando proporcionar novos dados sobre remediação de solos contaminados com cromo hexavalente e diesel, separadamente, a presente tese apresenta o estudo de aplicação da tecnologia de eletrocinética combinada com a barreira permeável reativa constituída de grânulos de cortiça. Para aumentar a eficiência de remoção dos poluentes, agentes quelantes e surfactante foram adicionados como eletrólitos. Para a remediação eletrocinética no solo contaminado com cromo hexavalente, a barreira utilizada foi composta por cortiça virgem e os eletrólitos utilizados foram: água destilada, ácido cítrico (1 M), cloreto de sódio (0,1 M) e água da torneira. Embora o ácido cítrico e o cloreto de sódio apresentem maior condutividade do que a água destilada, os resultados mostraram uma remoção superior de cromo total e hexavalente no teste EC-PRBa/AD-AD, em que água destilada foi adicionada nas câmaras dos eletrodos e grânulos de cortiça colocados perto do ânodo (41,5 % de remoção). Em termos de redução, mais de 82% do Cr (VI) foi reduzido a Cr (III) apenas pelo contato com o solo, provavelmente devido à alta concentração de Fe2+ no solo (> 6000 mg kg-1 ). Esse comportamento foi potencializado pela presença de ácido cítrico, que baixou ainda mais o pH do solo. O teste em que o cloreto de sódio foi o eletrólito em ambos os compartimentos apresentou a menor taxa de remoção, provavelmente devido à diminuição na disponibilidade de seus íons pela formação de sais e bases com cátions presentes na matriz do solo. Para a remediação no solo contaminado com diesel, a barreira utilizada foi composta por cortiça negra e os eletrólitos aplicados foram: água da torneira, sulfato de sódio (0,05 M) e dodecil sulfato sódico (3,46 M). Os resultados mostraram que, apesar do SDS e Na2SO4 proporcionarem efeitos mais intensos de migração de orgânicos devido a sua afinidade com o óleo e dissociam íons com maior capacidade condutiva, comparando com a água da torneira, o teste em que essa era o eletrólito resultou na melhor taxa de remoção de diesel, chegando a 85,3%. No entanto, a aplicação de SDS e Na2SO4 também promoveu resultados satisfatórios (72,4%). 2023-03-02 2022-10-11T20:44:17Z 2022-08-19 doctoralThesis ANDRADE, Deborah Cordeiro de. Estudo da remediação de solo contaminado com diesel ou cromo (VI) aplicando eletrocinética e barreira reativa permeável de cortiça. Orientadora: Elisama Vieira dos Santos. 2022. 140f. Tese (Doutorado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2022. https://repositorio.ufrn.br/handle/123456789/49554 pt_BR Acesso Embargado application/pdf Universidade Federal do Rio Grande do Norte Brasil UFRN PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA QUÍMICA |