City water pollution by soot-surface-active agents revealed by FTIR spectroscopy

Cocean, Iuliana; Cocean, Alexandru; Iacomi, Felicia; Gurlui, Silviu

doi:10.1016/j.apsusc.2019.04.179

Cited by 11 publications

(10 citation statements)

References 15 publications

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“…The FTIR spectra of the solid components separated by evaporation from foam and washing liquid ( Figure 3 a) denote a mixture of chemical compounds, which of interest for the present investigation is the presence of Al-OH bonds and sulfate groups assigned to aluminates (NaAlO 2 , Na 2 O·Al 2 O 3 , or Na 2 Al 2 O 4 or alkali form in solution, NaAl(OH) 4 ) and aluminum sulfate (Al 2 SO 4 ), respectively. Aluminate-type compounds, but also others based on aluminum, such as aluminum sulfate, are used based on the property of aluminum ions to coordinate with organic compounds, but also with some inorganic compounds [ 3 , 8 ]. Particles of dispersed or powdered substances are thus collected in agglomerations that could then be filtered from water or aspirated in a solid state from surfaces.…”

Section: Resultsmentioning

confidence: 99%

“…Binding compounds in the form of aluminates are therefore identified by the 3854 cm −1 [ 11 ] liquid and foam) and 3615 cm −1 (foam) [ 11 ] hydroxyl-specific vibrations when bonding with aluminum in aluminates (Al–OH–Al) and the 614 cm −1 (liquid) band of Al-O deformation vibrations [ 8 , 19 ]. Sulfate ions denoted by the bands of 1627 cm −1 (liquid) and 1631 cm −1 (foam) are assigned to aluminum sulfate and ferrous sulfate with vibration modes within this range [ 18 ].…”

Section: Resultsmentioning

confidence: 99%

“…The investigation herein shows how, through the washing process, compounds in the form of dust and/or other waste were entrained on the city streets. The washing operation was not followed by the suction of the washing waters; they spread along the streets, on the green spaces and on the buildings, with part spilling into the collecting street canals with possible infiltration in the water pipes for the domestic supply water [ 8 ], and also by evaporation and dust dispersion in the air, enhancing the range of chemical species polluting the atmosphere [ 22 , 23 , 24 , 25 ].…”

Section: Resultsmentioning

confidence: 99%

“…Of these, sodium aluminate in its various forms (NaAlO 2 , Na 2 O·Al 2 O 3 , Na 2 Al 2 O 4 , or as hydrated form NaAl(OH) 4 ) and aluminum hydroxide (Al(OH) 3 ) are most often used in water treatment, and also in construction for the coagulation of cements [ 4 , 5 , 6 , 7 ]. The polluting effects of infiltration of these compounds into the water used for domestic purposes have been reported [ 8 ]. Another category of coagulants used for wastewater treatment and taken as dust binders are calcium chloride and magnesium chloride.…”

Section: Introductionmentioning

confidence: 99%

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Urban Exotic Pollution: The Harmful Environmental Footprint for Health and Historical Architecture

Postolachi

Cocean

Garofalide

et al. 2023

IJERPH

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The study in this paper was carried out as a result of the observation of pollution phenomena and foaming effects associated with anthropogenic activities, including street cleaning activity. The processes of dust binding used in order to reduce PM10 and PM 2.5 pollution has been proven to be inefficient, and even contributing to pollution with particulate matter. Our results suggest that the use of dust binders must be integrated in a technique that includes methods of removing agglomerated particle structures resulting from the process of coagulation or flocculation. These are the conclusions of the investigations carried out by spectroscopic methods (FTIR, SEM-EDX) on samples collected from the streets of Iasi on 10 March 2021, and on samples collected from the surface of the Precinct Wall of the historical monument Golia—Iasi Monastery Ensemble (Romania). On the later samples, coloristic analysis was also performed. The alert for investigation was given by the foaming waters that were leaking on the streets. The phenomenon was observed after the streets had been washed by specialized vehicles. Analyses revealed compounds used as dust binders and coagulant type (aluminum sulfate, sodium aluminate and their derivatives, plus anti-skid chemicals such as calcium chlorine and magnesium chlorine), as well as organic compounds included in aggregate type structures, and they showed contamination of the Golia Precinct Wall. The results show that the dust binders or coagulants used as such, or embedded in various products intended for the cleaning process of streets or other outdoor public places, must be subject to regulation. Otherwise, there is a risk of adding more pollutants during an operation with the opposite purpose. The migration of these pollutants on the studied building offers an image on how both our health and all constructions and equipment exposed in the open air are affected.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Urban Exotic Pollution: The Harmful Environmental Footprint for Health and Historical Architecture

Postolachi

Cocean

Garofalide

et al. 2023

IJERPH

Self Cite

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“…Population growth, industrial development, land use, waste emissions, and automobile exhaust have significantly increased the urban environmental load with the development of urbanization (Gimeno et al, 2014). Environmental problems have become a major issue that we must face, and urban water pollution is serious (Xu and Haung, 2004;Wu, 2018;Iuliana et al, 2020;Zeng et al, 2020). Urban stormwater has been identified as a major nonpoint source of pollution containing heavy metals, polycyclic aromatic hydrocarbons (PAHs), and nutrients (nitrogen and phosphorus) that cause urban flooding, accelerate the migration of pollutants, and introduce secondary pollution into water and have toxic effects on human health.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Migration Characteristics of Stormwater Runoff Pollutants on Different Underlying Surfaces in Guangzhou, China

Pan¹,

Li²,

Gao³

et al. 2021

Front. Earth Sci.

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Stormwater runoff is identified as urban nonpoint source pollution that increasingly introduces contaminants to urban water bodies and impedes sustainable development. The pollution load of runoff varies due to the interception of different land cover types during the urban hydrological process. During the rainy season (June–August) in 2018, five different underlying surfaces (green roof, parking lot, urban road, parkway, and grassland) were selected in Guangzhou to analyze the migration characteristics of stormwater runoff pollutants. The concentrations of heavy metals, such as chromium (Cr), cadmium (Cd), lead (Pb), and mercury (Hg), as well as total nitrogen (TN), total phosphorus (TP), and polycyclic aromatic hydrocarbons (PAHs) were collected and analyzed on different underlying surfaces with the rainfall data at the beginning of a stormwater runoff event. The results showed that PAHs, heavy metals, and TP existed mainly in the form of particles; nitrogen was mainly present as ammonia and nitrate; and the TN, TP, PAHs, and heavy metal were significantly different in the stormwater runoff on each underlying surface. The pollutant concentration in urban road runoff was the highest, accounting for 40–70% of the total pollutant concentration in the stormwater runoff, and the pollutant concentration in green roof runoff was the lowest, accounting for 10–40% of the total pollutant concentration in the runoff. An obvious effect of initial rainfall erosion was observed during stormwater runoff from urban roads and parking lots, and the scouring effect on grasslands and green roofs was mainly due to the many factors affecting the underlying surface during the middle and late stages. The rates of reduction of heavy metals were the most significant. The effect of water purification was positively correlated with stormwater runoff duration. The rates of reduction of TN, heavy metals (Cr, Cd, and Hg), and PAHs in the grassland areas were 35.20 ± 26.28, 0.24 ± 10.13, 71.77 ± 10.97,32.62 ± 110.48, and 41.30 ± 8.78%, respectively. This study could provide a theoretical basis for preventing and managing pollutants in urban stormwater runoff.

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One stone three birds: Simultaneous detection, adsorption and photocatalysis, the novel coordinated treating strategy towards complicated pollution system and the mechanism analysis

Jiang,

Fan,

Qiu

et al. 2024

Applied Surface Science

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City water pollution by soot-surface-active agents revealed by FTIR spectroscopy

Cited by 11 publications

References 15 publications

Urban Exotic Pollution: The Harmful Environmental Footprint for Health and Historical Architecture

Urban Exotic Pollution: The Harmful Environmental Footprint for Health and Historical Architecture

Analysis of the Migration Characteristics of Stormwater Runoff Pollutants on Different Underlying Surfaces in Guangzhou, China

One stone three birds: Simultaneous detection, adsorption and photocatalysis, the novel coordinated treating strategy towards complicated pollution system and the mechanism analysis

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