Potential microbial toxicity and non-target impact of different concentrations of glyphosate-containing herbicide (GCH) in a model pervious paving system

Mbanaso, Fredrick U.; Coupe, Stephen J.; Charlesworth, Susanne M.; Nnadi, Ernest O.; Ifelebuegu, Augustine O.

doi:10.1016/j.chemosphere.2013.12.091

Cited by 13 publications

(15 citation statements)

References 41 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These values, expressed as colony forming units per gram, give an indication of the microbial growth throughout the depth profile of the PPS. The microorganisms present are likely to play an important and beneficial role in improving effluent quality through both biodegradation of oil and organic materials and adsorption of heavy metals [4,19]. The highest numbers of organisms were found in the lower parts of the model, in the layers of aggregate which were the wettest parts of the structure.…”

Section: Resultsmentioning

confidence: 99%

“…The <5 mm RS was digested using a standard wet acid technique in a microwave, followed by analysis for a selection of heavy metals using a Perkin Elmer 5300 DV ICP-OES (Perkin Elmer, Waltham, MA, USA) [19]. To ascertain the metal content of the unused oil, 1 g was mixed with 50 mL of deionised water and shaken overnight.…”

Section: Methodsmentioning

confidence: 99%

“…Following cleaning, therefore, there may be a time when treatment in the surface layer is sub-optimal due to the removal of the biofilm. The microorganisms are found simply in the surrounding air, previous studies inoculating the PPS with mixtures of microbes [3] found no advantage, in fact, experiments by [19] whereby the biofilm was removed using a herbicide, found that it recovered fairly rapidly. Numbers of colony forming microbes were found to be higher in the aggregate layer of the PA PPS, so it is likely that for the short time whilst the surface biofilm recovers, infiltrating pollutants could be dealt with deeper in the PPS structure, which could provide the focus for future investigations.…”

Section: Potential For Impacts On Environmental Healthmentioning

confidence: 99%

See 2 more Smart Citations

The Fate of Pollutants in Porous Asphalt Pavements, Laboratory Experiments to Investigate Their Potential to Impact Environmental Health

Charlesworth

Beddow

Nnadi

2017

IJERPH

View full text Add to dashboard Cite

Pervious Paving Systems (PPS) are part of a sustainable approach to drainage in which excess surface water is encouraged to infiltrate through their structure, during which potentially toxic elements, such as metals and hydrocarbons are treated by biodegradation and physical entrapment and storage. However, it is not known where in the PPS structure these contaminants accumulate, which has implications for environmental health, particularly during maintenance, as well as consequences for the recycling of material from the PPS at the end-of-life. A 1 m3 porous asphalt (PA) PPS test rig was monitored for 38 months after monthly additions of road sediment (RS) (367.5 g in total) and unused oil (430 mL in total), characteristic of urban loadings, were applied. Using a rainfall simulator, a typical UK rainfall rate of 15 mm/h was used to investigate its efficiency in dealing with contamination. Water quality of the effluent discharged from the rig was found to be suitable for discharge to most environments. On completion of the monitoring, a core was taken down through its surface, and samples of sediment and aggregate were taken. Analysis showed that most of the sediment remained in the surface course, with metal levels lower than the original RS, but higher than clean, unused aggregate or PA. However, even extrapolating these concentrations to 20 years’ worth of in-service use (the projected life of PPS) did not suggest their accumulation would present an environmental pollution risk when carrying out maintenance of the pavement and also indicates that the material could be recycled at end-of-life.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Potential For Impacts On Environmental Healthmentioning

confidence: 99%

See 1 more Smart Citation

The Fate of Pollutants in Porous Asphalt Pavements, Laboratory Experiments to Investigate Their Potential to Impact Environmental Health

Charlesworth

Beddow

Nnadi

2017

IJERPH

View full text Add to dashboard Cite

show abstract

“…Various non-target organisms have been used as bioindicators of glyphosate environmental impacts, including protozoans (Coupe & Smith, 2006), worms (Contardo-Jara et al, 2009); insects (Linz et al, 1999;Baker et al, 2014) and microorganisms (Tsui & Chu, 2003;Ratcliff et al, 2006;Gomez et al, 2009;Mbanaso et al, 2014;Santos et al, 2009). The focus on a particular group of organisms results in data inherently limited to the phylum, and could be financially prohibitive.…”

mentioning

confidence: 99%

The impact of glyphosate herbicides on soil microbial activity from the Carajás National Forest

Castilho¹,

Viana²,

Santos³

et al. 2016

RCA

View full text Add to dashboard Cite

KEYWORDS Bioindicators Invasive plants Microbial respiration rate Metabolic quotient PALAVRAS-CHAVE Bioindicadores Plantas invasoras Taxa de respiração microbiana Quociente metabólico ABSTRACT:The objective of this study was to evaluate the impact of different glyphosate-based herbicide formulations on microbial activity of soils from Carajás National Forest. We tested three formulations of glyphosate, i.e., Roundup Original  , Roundup Ultra  and Roundup WG  that were applied in five doses: 0; 240; 480; 720 and 1440 g of active ingredient in acid equivalent ha -1 , with four replications. Herbicides were sprayed on pots containing 500 g of soil derived from the 0-10 cm layer of the study site. We determined the carbon from microbial biomass (C-MB), microbial respiration rate (MR) and metabolic quotient (qCO 2 ) at one and 28 days after herbicide application. No treatment affected the C-MB and MR at one and 28 days of incubation. There was no difference for qCO 2 at any dose of Roundup Ultra  and WG  formulations at one and 28 days of incubation. However, the qCO 2 was inhibited by the Roundup Original  at one day post treatment. This parameter was normalized at 28 days after herbicide application. The data indicate that no one of the treatments tested cause significant impact on soil microorganisms of the Carajás National Forest, suggesting that herbicide-based invasive weed control could be used. RESUMO: Objetivou-se com este estudo avaliar o impacto de diferentes formulações de herbicidas à base de glyphosate na atividade microbiana de solo da Floresta Nacional de Carajás. Foram testadas três formulações comerciais de glyphosate (Roundup Original

show abstract

“…Utiliza-se o termo glifosato para designar tanto o ingrediente ativo quanto seus sais derivados, pois todos os compostos são biologicamente equivalentes (YAMADA; CASTRO, 2004). As formulações comerciais contendo glifosato como ingrediente ativo disponíveis no mercado são de 3600 mg.L -1 a 8400 mg.L -1 , sendo 7200 mg.L -1 a concentração mais comum (MBANASO et al, 2014).…”

Section: Introductionunclassified

Estudo da biodegradação bacteriana do herbicida glifosato por microbiota de corpo hídrico e por coleção laboratorial e análise da presença de glifosato em corpo hídrico do município de Guaratinguetá/SP

Cruvinel¹

View full text Add to dashboard Cite

Potential microbial toxicity and non-target impact of different concentrations of glyphosate-containing herbicide (GCH) in a model pervious paving system

Cited by 13 publications

References 41 publications

The Fate of Pollutants in Porous Asphalt Pavements, Laboratory Experiments to Investigate Their Potential to Impact Environmental Health

The Fate of Pollutants in Porous Asphalt Pavements, Laboratory Experiments to Investigate Their Potential to Impact Environmental Health

The impact of glyphosate herbicides on soil microbial activity from the Carajás National Forest

Estudo da biodegradação bacteriana do herbicida glifosato por microbiota de corpo hídrico e por coleção laboratorial e análise da presença de glifosato em corpo hídrico do município de Guaratinguetá/SP

Contact Info

Product

Resources

About