Distribution, fate and persistence of organochlorine compounds formed during production of bleached pulp

Neilson, Alasdair H.; Allard, Ann‐Sofie; Hynning, Per‐Åke; Remberger, Mikael

doi:10.1080/02772249109357638

Cited by 93 publications

(40 citation statements)

References 147 publications

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“…Phenol and substituted phenols are popular compounds found in water due to their widespread use in industry processes [1,2]. Because of their high toxicity and unpleasant organoleptic properties, some phenols have been included in the priority pollution list of US Environmental Protection Agency (EPA) [3].…”

Section: Introductionmentioning

confidence: 99%

Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididone‐divinylbenzene) monolith

Huang¹,

Qiu

Yuan

2009

J of Separation Science

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Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididonedivinylbenzene) monolith An effective and simple method for polar phenols in water matrix was developed by using stir bar sorptive extraction (SBSE) based on a hydrophilic poly(vinylpyrrolididone-divinylbenzene) (VPDB) monolithic material and HPLC analysis. To achieve optimum extraction performance for phenols, several parameters, including extraction and desorption time, desorption solvent, pH value, and ionic strength of sample matrix, were investigated. Under the optimized experimental conditions, eight phenols were directly enriched from water samples and analyzed by HPLC-DAD. The detection limits (S/N = 3) and quantification limits (S/N = 10) of the proposed method for the target compounds were achieved within the range of 0.72 -1.37 and 2.40 -4.27 ng/mL from spiked water, respectively. Recoveries of eight phenolic compounds were found in the range of 55.2 -95.9%. The calibration curves showed the linearity ranging from 5 to 150 ng/mL with linear regression coefficient R 2 values above 0.98. Method repeatability presented as intra-and interday precisions were also found with the RSDs less than 4.10 and 7.61%, respectively. The distribution coefficients between VPDB and water (K VPDB/W ) for phenolic compounds were also calculated and compared with K O/W . Finally, the proposed method was successfully applied to the determination of the target compounds in tap water, sea water and wastewater samples.

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Section: Introductionmentioning

confidence: 99%

Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididone‐divinylbenzene) monolith

Huang¹,

Qiu

Yuan

2009

J of Separation Science

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“…Aromatic compounds, such as 2,4-dichlorophenoxyacetic acid, 3-chlorobenzoate, and chlorocatechol, are among the most hazardous due to their (or their derivatives') potential carcinogenesis and recalcitrance to degradation (Neilson et al, 1991;Capasso et al, 1995). On the other hand, the increasing accumulation of these compounds in the environment has prompted native bacteria (Pseudomonas, Alcaligenes, Ralstonia) to develop capabilities of using them as carbon and/or energy sources.…”

mentioning

confidence: 99%

The Key Role of Chlorocatechol 1,2-Dioxygenase in Phytoremoval and Degradation of Catechol by Transgenic Arabidopsis

Liao

Zhou

et al. 2006

Plant Physiology

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Transgenic exploitation of bacterial degradative genes in plants has been considered a favorable strategy for degrading organic pollutants in the environment. The aromatic ring characteristic of these pollutants is mainly responsible for their recalcitrance to degradation. In this study, a Plesiomonas-derived chlorocatechol 1,2-dioxygenase (TfdC) gene (tfdC), capable of cleaving the aromatic ring, was introduced into Arabidopsis (Arabidopsis thaliana). Morphology and growth of transgenic plants are indistinguishable from those of wild-type plants. In contrast, they show significantly enhanced tolerances to catechol. Transgenic plants also exhibit strikingly higher capabilities of removing catechol from their media and high efficiencies of converting catechol to cis,cis-muconic acid. As far-less-than-calculated amounts of cis,cis-muconic acid were accumulated within the transgenic plants, existence of endogenous TfdD-and TfdE-like activities was postulated and, subsequently, putative orthologs of bacterial tfdD and tfdE were detected in Arabidopsis. However, no TfdC activity and no putative orthologs of either tfdC or tfdF were identified. This work indicates that the TfdC activity, conferred by tfdC in transgenic Arabidopsis, is a key requirement for phytoremoval and degradation of catechol, and also suggests that microbial degradative genes may be transgenically exploited in plants for bioremediation of aromatic pollutants in the environment.

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“…Essas substâncias causam uma constante preocupação do ponto de vista ambiental, 13 devido ao alto grau de toxicidade, bioacumulação nas diferentes cadeias alimentares, mesmo em baixas concentrações e persistência no ambiente. [14][15][16] A Tabela 1 apresenta os fenóis incluídos na lista de poluentes prioritários. Os 20 compostos fenólicos presentes nesta lista dividem-se em 4 grupos principais, além do próprio fenol: cloro-fenóis; metil-fenóis (cresóis); nitro-fenóis; e outros fenóis que apresentam mais de um tipo de substituinte no anel aromático.…”

Section: Compostos Fenólicosunclassified

Alternativas verdes para o preparo de amostra e determinação de poluentes fenólicos em água

Rodrigues¹,

Silva²,

Silva³

2010

Quím. Nova

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Recebido em 8/10/09; aceito em 11/3/10; publicado na web em 20/7/10 GREEN ALTERNATIVES FOR SAMPLE PREPARATION AND DETERMINATION OF PHENOLIC POLLUTANTS IN WATER. The restricted availability of water sources suitable for consumption and high costs for obtaining potable water has caused an increase of the conscience concerning the use. Thus, there is a high demand for "environmentally safe methods" which are according to the principles of Green Chemistry. Moreover, these methods should be able to provide reliable results for the analysis of water quality for various pollutants, such as phenol. In this work, greener alternatives for sample preparation for phenol determination in aqueous matrices are presented, which include: liquid phase microextraction, solid phase microextraction, flow analysis, cloud point extraction and aqueous two-phase systems.Keywords: phenols; green chemistry; water. INTRODUÇÃONas últimas décadas, devido às consequências negativas do grande crescimento industrial e populacional, que provoca graves danos à saúde humana e à natureza, o aumento da responsabilidade ambiental tem sido visível. Diversos países têm voltado seus esforços para a busca do desenvolvimento auto-sustentável, que pode ser definido como o progresso industrial que atenda às necessidades do presente sem comprometer a capacidade das futuras gerações de satisfazerem suas próprias necessidades. 1 Inevitavelmente, essa demanda teve influência decisiva na Quí-mica. Pesquisadores têm buscado, cada vez mais, desenvolver novos métodos, 2,3 elaborar novas sínteses, 4,5 criar novas ferramentas, 6,7 que reduzam ou eliminem componentes indesejáveis de uma análise química, como, produção de resíduos, uso de reagentes tóxicos, desperdício de energia em processos industriais, etc. Química verde (QV): definição e princípiosA partir da década de 90, surge uma nova tendência em como conduzir as análises químicas, com o intuito de reduzir o impacto ambiental das mesmas. Essa nova visão é denominada Green Chemistry, ou química verde, química limpa, química ambientalmente benigna, ou ainda, química auto-sustentável. O conceito da química verde, que inclui 12 princípios básicos, é definido como o projeto, desenvolvimento e a aplicação de produtos e processos químicos com o objetivo de reduzir ou eliminar o uso ou a geração de substâncias nocivas à saúde humana e ao ambiente.8 A partir disso, iniciaram-se diversas pesquisas com o objetivo de desenvolver métodos ambientalmente seguros.Um dos principais alvos dos estudos envolvendo química verde e preocupação ambiental é o monitoramento da qualidade das águas, haja vista o papel fundamental desempenhado pela água na manutenção de todos outros segmentos da natureza. Para que esse monitoramento (não apenas da água, mas como de outras matrizes, como solos, atmosfera, etc.) fosse realizado de forma eficaz, diversas agências de controle ambiental foram criadas. Dentre elas, destacamse a Environmental Protection Agency (EPA) que, atualmente, é um dos principais órgãos de controle ambiental do mundo e, em ...

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Distribution, fate and persistence of organochlorine compounds formed during production of bleached pulp

Cited by 93 publications

References 147 publications

Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididone‐divinylbenzene) monolith

Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididone‐divinylbenzene) monolith

The Key Role of Chlorocatechol 1,2-Dioxygenase in Phytoremoval and Degradation of Catechol by Transgenic Arabidopsis

Alternativas verdes para o preparo de amostra e determinação de poluentes fenólicos em água

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