Microbiologically induced deterioration of concrete: a review

Wei, Shiping; Jiang, Zhenglong; Liu, Hao; Zhou, Dongsheng; Sánchez-Silva, Mauricio

doi:10.1590/s1517-83822014005000006

Cited by 165 publications

(80 citation statements)

References 62 publications

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“…It was noted early that aged pigeon dung contained much less ammonia (in the form of ammonium carbonate, [NH 4 ] 2 CO 3 ) (Loudon 1831). This is caused by ammonium oxidizing bacteria, which excrete nitrous (HNO 2 ) and nitric acid (HNO 3 ) (Fernandes 2006;Wei et al 2013). The bacterial action of the fermented pigeon dung with its weak acidity allows for gentle deliming of the hides, making them supple (NIIR Board of Consultants & Engineers 2011).…”

Section: Chemistry Of Pigeon Excretamentioning

confidence: 99%

Dietary habits of urban pigeons (Columba livia) and implications of excreta pH – a review

Spennemann¹,

Watson²

2017

European Journal of Ecology

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Pigeons are considered to be urban pests, causing untold damage to buildings and potentially impacting the health of humans who come into contact with them or their faeces. Pigeon faecal matter has been implicated in both health impacts and building damage, with the acidity of the excreta playing an important role. Purpose of the Review. This paper is a wide-ranging review of the chemical processes of excreta in the pigeon to aid our understanding of the potential problems of pigeons to buildings and human amenity in the urban space. The natural pH of pigeons is shown to vary based on the bird's and age as well as reproductive stage. Key findings of the review. The influences of the altered diet between the rock dove (the wild progenitor of the feral pigeon) and the feral pigeon are detailed, indicating that the human-based diet of urban pigeons most likely causes the feral pigeon excreta to be more acidic than the rock dove excreta. This higher acidity is due in part to diet, but also to potential increases in faecal and/or uric acid volumes due to the low quality of humanbased diets. Again, this area of interest is highly data deficient due to the few number of studies and unspecified dietary intake before pH measurement. Implications of the review. Humans are increasingly concerned about pigeon populations (and presumably their accumulated faeces) in the urban space, and control comprises a large part of the interaction between humans and feral pigeons. This review provides a greater understanding of feral pigeons and the true effects of their excreta. INTRODUCTION ABSTRACTColumba livia; pH; Foraging; Diet; Excreta KEYWORDS

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Section: Chemistry Of Pigeon Excretamentioning

confidence: 99%

Dietary habits of urban pigeons (Columba livia) and implications of excreta pH – a review

Spennemann¹,

Watson²

2017

European Journal of Ecology

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“…Algae at high concentrations are reported to accelerate concrete corrosion and damage pipeline integrity (Setareh and Javaherdashti, 2006;Jayakumar and Saravanane, 2010;Wei et al, 2013). This corrosive effect is caused either by forming tubercles and by generating organic acids, or by developing electrochemical cells (Setareh and Javaherdashti, 2006).…”

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confidence: 99%

KMnO 4 –Fe(II) pretreatment to enhance Microcystis aeruginosa removal by aluminum coagulation: Does it work after long distance transportation?

Lan

Miao

et al. 2016

Water Research

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a b s t r a c tKMnO 4 eFe(II) pretreatment was proposed to enhance Microcystis aeruginosa (M. aeruginosa) removal by aluminum (Al) coagulation in drinking water treatment plants (DWTPs) in our previous study. This study aims to optimize this process and evaluate the feasibility of using the process at water sources, which are usually far away from DWTPs. The optimum molar ratio of KMnO 4 to Fe(II) ½R KMnO4:FeðIIÞ is observed to be 1:3 with respect to algae removal and residual manganese (Mn) control. As indicated from flow cytometer analysis, KMnO 4 at <20 mM promisingly maintains cell integrity, with damaged cell ratios of below 10%. KMnO 4 at 30 and 60 mM damages M. aeruginosa cells more significantly and the damaged cell ratios increase to 21% and 34% after 480 min. The intracellular organic matter (IOM) release can be controlled by the subsequent introduction of Fe(II) to quench residual KMnO 4 . KMnO 4 eFe(II) pretreatment at the KMnO 4 dose of 10 mM dramatically enhances the algae removal by over 70% compared to that by Al coagulation, even if KMnO 4 and Fe(II) are introduced 480 min prior to the addition of Al 2 (SO 4 ) 3 . The Al doses can be reduced by more than half to achieve the same algae removal. Furthermore, the deposition of the tiny FeeMn precipitates formed rarely occurs, as indicated by a settleability evaluation prior to Al addition. The KMnO 4 eFe(II) process can be sequentially dosed at intake points in water sources to achieve moderate inactivation of algae cells and to enhance algae removal in DWTPs thereafter.

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“…Despite of this, it is necessary to provide a new recycling process that permits generate an aggregate value for these kinds of wastes, which represent 16% of total solid waste produced in the world [21][22][23]. The proper management and recycling of CDW avoid that uncontrolled disposal in landfills, parks, roads separators, private lots; legal, and illegal dumps, among others [24].…”

Section: Introductionmentioning

confidence: 99%

Mineralogical characterization of urban construction and demolition waste: potential use as a nutrient source for degraded soils

Mejía

Tobón

Bedoya

et al. 2015

WIT Transactions on Ecology and the Environment

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The consumption of raw materials in the construction industry is a non-sustainable activity because in this process large amounts of natural resources are consumed. Moreover, Construction and Demolition Waste (CDW) represents around 50% of waste produced in the urban region of world. For example, in the Medellin Metropolitan Area (MMA), 10,400 t.day -1 of CDW are produced, of which only 9.7% is recycled. It is for this reason that CDW management is currently unsustainable and generates significant adverse environmental impacts. It is today acknowledged that this waste can be used as a by-product material for the production of recycled coarse aggregate, showing industrial applicability. However, CDW with small particle sizes (less than 4 mm that represents around 16% of this waste), do not have applicability in these processes. Therefore, it is necessary to reduce CDW volume dumped. An alternative to the final disposal of finer CDW is to use it to improve the physical and chemical properties of degraded soils and improve vegetation and ecosystem services. This paper evaluated the potential use of CDW as a source of nutrients for degraded soils after it was submitted to bioacidulation process by Aspergillus niger and Mortierella sp. Insoluble minerals such as quartz, calcite, wollastonite, albite, anatase and actinolite were found in the CDW by mineralogical and chemical characterization techniques. CDW mesh could improve the physical properties of degraded soils since these particles are similar in size to silt and clay. Furthermore, after CDW were bioacidulated an increased concentration of Ca 2+ were found, an essential nutrient for the growth and development of plants.

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Microbiologically induced deterioration of concrete: a review

Cited by 165 publications

References 62 publications

Dietary habits of urban pigeons (Columba livia) and implications of excreta pH – a review

Dietary habits of urban pigeons (Columba livia) and implications of excreta pH – a review

KMnO 4 –Fe(II) pretreatment to enhance Microcystis aeruginosa removal by aluminum coagulation: Does it work after long distance transportation?

Mineralogical characterization of urban construction and demolition waste: potential use as a nutrient source for degraded soils

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