Indexado em
- Banco de Dados de Periódicos Acadêmicos
- Genamics JournalSeek
- Chaves Acadêmicas
- JournalTOCs
- Infraestrutura Nacional de Conhecimento da China (CNKI)
- Scimago
- Acesso à pesquisa on-line global em agricultura (AGORA)
- Biblioteca de periódicos eletrônicos
- RefSeek
- Diretório de Indexação de Periódicos de Pesquisa (DRJI)
- Universidade de Hamdard
- EBSCO AZ
- OCLC- WorldCat
- Catálogo online SWB
- Biblioteca Virtual de Biologia (vifabio)
- publons
- MIAR
- Comissão de Bolsas Universitárias
- Fundação de Genebra para Educação e Pesquisa Médica
- Euro Pub
- Google Scholar
Links Úteis
Compartilhe esta página
Folheto de jornal
Periódicos de Acesso Aberto
- Agro e Aquicultura
- Alimentos e Nutrição
- Bioinformática e Biologia de Sistemas
- Bioquímica
- Ciência de materiais
- Ciencias ambientais
- Ciências Clínicas
- Ciências Farmacêuticas
- Ciências gerais
- Ciências Médicas
- Cuidados de enfermagem e saúde
- Engenharia
- Genética e Biologia Molecular
- Gestão de negócios
- Imunologia e Microbiologia
- Neurociência e Psicologia
- Química
Abstrato
Biodegradation of Bitumen in Soil and Its Enhancement by Inorganic Fertilizer and Oxygen Release Compound: Experimental Analysis and Kinetic Modelling
Samuel E Agarry and Kigho M Oghenejoboh
The objective of this work was to investigate and evaluate the effect of inorganic nutrient (NPK fertilizer), hydrogen peroxide and their combinations on the kinetics of bitumen degradation by autochthonous microorganisms in the soil. The study was carried out by artificially contaminating an un-impacted tropical soil with 40 g/kg of bitumen in plastic bins and amended with various amount of NPK fertilizer (1.63 g, 2.10 g and 2.56 g), hydrogen peroxide (0.5 g and 1.0 g) and combinations of NPK fertilizer and hydrogen peroxide (2.13 g, 2.60 g and 3.06 g), respectively. The bioremediation was carried out for 21 days. Results showed that inorganic NPK fertilizer, hydrogen peroxide and their combinations stimulated microbial growth and enhanced bitumen biodegradation. The bacterial count and percentage total petroleum hydrocarbon degradation relatively increased with increase in the amount of inorganic nutrient and oxygen release compound used in this study. More than 50% of the hydrocarbons were degraded within each remediation period. The combined addition of inorganic NPK fertilizer and hydrogen peroxide provided the highest percentage biodegradation (>60%). Under abiotic conditions, no total petroleum hydrocarbon removal was observed while a maximum of 10.8% total petroleum hydrocarbons removal was obtained in unamended soil (natural attenuation) experiment. A first-order kinetic model successfully described the bitumen biodegradation. The model revealed that bitumen contaminated-soil microcosms amended with inorganic nutrient and oxygen release compound had higher biodegradation rate constants, as well as lower half-life times, than unamended soil (natural attenuation) remediation system. The biodegradation rate constant was higher with lower half life time as the amount of inorganic nutrient and oxygen release compound in soil increased.