Anaerobic–aerobic treatment of halogenated phenolic compounds

Armenante, Piero M.; Kafkewitz, David; Lewandowski, G. A.; Jou, Chih-Ju G.

doi:10.1016/s0043-1354(98)00255-3

Cited by 183 publications

(84 citation statements)

References 51 publications

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“…Este sistema aumenta significativamente a eficiência do processo de tratamento, o que permite a redução do tamanho das estações e dos tempos de residência 67,68 . Na Finlândia, por exemplo, está sendo aplicado com grande sucesso um tratamento combinado deste tipo.…”

Section: Figura 5 Exemplos De Dois Processos Pelos Quais Ocorre a Deunclassified

Novas tendências para o tratamento de resíduos industriais contendo espécies organocloradas

Freire¹,

Pelegrini²,

Kubota³

et al. 2000

Quím. Nova

146

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, and mainly the low efficiency of the current remediation processes, are important aspects that have been promoted to study new degrading technologies. Among the great number of new physical and chemical alternatives, the photochemical and electrochemical processes have been played an important role, mainly due to their high degradation capacity through relatively low-cost procedures. In these contexts biological processes, the use of white-rot fungi, or even ligninolytic enzymes produced from them, are also very promising alternatives. However, the necessity of long reaction time and the high cost of the enzyme production process are some of the drawbacks that difficult the definitive consolidation of these processes.Keywords: organochloride compounds; industrial effluents; degradation processes. REVISÃO INTRODUÇÃOCom a evolução dos processos industriais e o conseqüente surgimento de inúmeros produtos que rapidamente tornaram-se de primeira necessidade, a atividade industrial adquiriu um caráter essencial na sociedade contemporânea. Embora a sua importância seja indiscutível, a atividade industrial costuma ser responsabilizada, e muitas vezes com justa razão, pelo fenô-meno de contaminação ambiental, principalmente graças a dois fatores de extrema importância: a) o acúmulo de matérias primas e insumos, que envolve sérios riscos de contaminação por transporte e disposição inadequada; e b) ineficiência dos processos de conversão, o que necessariamente implica a geração de resíduos.Embora exista uma preocupação universal em se evitar episódios de contaminação ambiental, estes eventos prejudiciais continuam acontecendo, principalmente porque, em função dos fatores acima comentados, grande parte dos processos produtivos são intrinsecamente poluentes. Ao longo das décadas, a atividade industrial tem produzido rejeitos gasosos, líquidos e sólidos nocivos ao meio ambiente. Substâncias químicas presentes na atmosfera, principalmente compostos organoclorados voláteis produzidos pelo homem, tem colocado em risco a vida na terra através da destruição da camada de ozônio. Da mesma forma, processos industriais que utilizam grandes volumes de água contribuem significativamente com a contaminação dos corpos d'água, principalmente pela ausência de sistemas de tratamento para os grandes volumes de efluentes líquidos produzidos. Dentro deste contexto, uma importante parcela do processo de contaminação pode ser atribuída às atividades das refinarias de petróleo, indústrias químicas, têxteis e papeleiras. No entanto, não menos importante é a contribuição da atividade agrícola, dos esgotos sanitários e dos resíduos domésticos.Em função deste panorama, muitos estudos têm sido realizados buscando desenvolver tecnologias capazes de minimizar o volume e a toxicidade dos efluentes industriais [1][2][3][4][5] . Infelizmente, a aplicabilidade destes tipos de sistemas está subordinada ao desenvolvimento de processos modificados e ao estabelecimento de sistemas de reciclagem de efluentes, atividades que implicam em tecnologias evolutivas e ...

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Section: Figura 5 Exemplos De Dois Processos Pelos Quais Ocorre a Deunclassified

Novas tendências para o tratamento de resíduos industriais contendo espécies organocloradas

Freire¹,

Pelegrini²,

Kubota³

et al. 2000

Quím. Nova

146

View full text Add to dashboard Cite

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“…These compounds are present in the wastewater generated from industrial activities such as petrochemical, pharmaceutical, wood preserving, plastic, rubber proofing, pesticide, iron steel, textile, and paper and cellulose bleaching industries [7,8]. Chlorophenols as environmental pollutants are highly toxic and carcinogenic with strong odour emission, not readily biodegradable and persistent in the environment and thus poses a serious ecological problem and public health risk causing problems with the human respiratory and nervous system [9][10][11][12]. For this reason an increasing attention has been directed toward the research of new strategies and environmental-friendly technologies to be applied for the remediation of ecosystems contaminated by hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of 2,6-Dichlorophenol Wastewater in Soil Column Reactor in the Presence of Pineapple Peels-Derived Activated Carbon, Palm Kernel Oil and Inorganic Fertilizer

Agarry¹,

Aremu²,

Aworanti³

2013

JEP

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In this study, the potential effects of palm kernel oil (PKO), pineapple peels derived-activated carbon (PPAC) and NPK fertilizer (20:10:10) as amendment agents on the natural bioattenuation of 2,6-dichlorophenol (2,6-DCP) in tropical agricultural soil were investigated. The effect of PPAC dosage on 2,6-DCP biodegradation was also studied. Column reactors containing soil were spiked with 2,6-dichlorophenol (2,6-DCP) wastewater (300 mg/l) and amended with PKO, NPK fertilizer and PPAC alone or in combinations. The rates of 2,6-DCP biodegradation were studied for a remediation period of 42 days under laboratory conditions. The results showed that there was a positive relationship between the rate of 2,6-DCP biodegradation, bacterial growth rate and presence of NPK fertilizer and PPAC (alone or in combination) in soil column microcosms contaminated with 2,6-DCP. The 2,6-DCP biodegradation data fitted well to the first-order kinetic model. The model revealed that 2,6-DCP contaminated-soil microcosms amended with NPK fertilizer and PPAC (alone or in combination) had higher biodegradation rate constants (k) as well as lower half-life times (t 1/2 ) than soil column microcosms amended with PKO and unamended soil (natural attenuation) remediation system. Thus, the use of combined NPK fertilizer and activated carbon (NPK + PPAC) to enhance 2,6-DCP degradation in the soil could be one of the severally sought bioremediation strategies of remediating natural ecosystem (environment) contaminated with organic chemicals.

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“…CPs can be introduced into the environment from various sources such as wood preservatives, pesticides, and degradation of other compounds. 2 Moreover, drinking water disinfection with active chlorine can also form some chlorophenols when phenolic compounds are already present in raw water. 3 Importantly, most water treatment plants in Brazil are not equipped with activated carbon and/or membrane filters, and therefore elimination of possible chemical residues is less efficient.…”

Section: Introductionmentioning

confidence: 99%

Chlorophenols in tap water from wells and surface sources in Rio de Janeiro, Brazil: method validation and analysis

Sartori¹,

Krauss²,

Braga³

et al. 2012

Quím. Nova

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Recebido em 18/7/11; aceito em 24/10/11; publicado na web em 4/1/12Two analytical methods were validated for determination of trichlorophenols, tetrachlorophenols and pentachlorophenol in drinking water. Limits of quantification were at least ten times lower than maximum permissible levels set by the Brazilian legislation, which are 200 ng mL -1 for 2,4,6-trichlorophenol and 9 ng mL -1 for pentachlorophenol. Chlorophenol levels were determined in tap water collected in the Municipality of Rio de Janeiro. 2,4,6-Trichlorophenol residues were detected in 36% of the samples, varying from 0.008 to 0.238 ng mL -1. All other analytes were below the limit of quantification. The validated methods showed to be suitable for application in routine quality control.

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Anaerobic–aerobic treatment of halogenated phenolic compounds

Cited by 183 publications

References 51 publications

Novas tendências para o tratamento de resíduos industriais contendo espécies organocloradas

Novas tendências para o tratamento de resíduos industriais contendo espécies organocloradas

Biodegradation of 2,6-Dichlorophenol Wastewater in Soil Column Reactor in the Presence of Pineapple Peels-Derived Activated Carbon, Palm Kernel Oil and Inorganic Fertilizer

Chlorophenols in tap water from wells and surface sources in Rio de Janeiro, Brazil: method validation and analysis

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