scholarly journals Features of copper accumulation in the soils of different functional areas of Novokuybyshevsk

2019 ◽  
Vol 8 (2) ◽  
pp. 67-71
Author(s):  
Alexander Igorevich Startsev
Keyword(s):  
Urban Areas ◽  
Copper Content ◽  
Residential Area ◽  
Soil Samples ◽  
Anthropogenic Sources ◽  
Copper Accumulation ◽  
Test Plot ◽  
Oil Refineries ◽  
Functional Zones ◽  
Functional Areas

The vegetation of the Samara Region is characterized by a relatively high content of copper. This biogeochemical feature is typical for natural and technogenic transformed ecosystems of the region. Copper is included in the group of elements of the 2nd hazard class. At certain concentrations it is necessary for the normal functioning of all organisms, but with increasing concentrations in the environment or in food it shows toxicity. The technogenic sources of copper include metalworking and machine-building enterprises, fertilizers, road and rail transport, wastewater, products of incomplete fuel combustion and refining characteristic of the Samara Region. The peculiarities of copper accumulation and distribution in soils of urban areas of the region are insufficiently studied. Previously, such studies were carried out only in certain areas of Samara. The paper analyzes in detail the level of technogenic copper pollution of the soil cover in Novokuybyshevsk. Ecological and geochemical studies in Novokuybyshevsk were carried out for 3 years (2016-2018) on 7 stationary test plots in its different functional areas and on 1 background test plot. The objects of research were soil samples taken from the upper humus horizon (layer 0-10 cm). The quantitative content of copper in soil samples was determined by the method of inversion voltammetry. A comparative analysis revealed territories of Novokuybyshevsk with relatively high, medium and low levels of copper in the soil. The first group included the Park Dubki in its elevated part, the old residential area on Kirov Street, the roadside area at the intersection of Pobeda Avenue and Dzerzhinsky Street (93,3-90,7 mg/kg). The second group with an average copper content (71,0-73,3 mg/kg) included the square Elochki and a new residential area on Ostrovsky Street. The third group with a relatively low copper content (38,3-54,7 mg/kg) included three sample areas: the lowland part of the Park Dubki, the industrial zone and the background area. The concentration of copper in the soils of all studied functional zones in Novokuybyshevsk has not reached the level of approximate permissible concentration (APC), but more than the clark of the world soils and the background indicators. The downward trend in the concentration of copper in the soils of most of the studied functional zones of Novokuybyshevsk in 2018 compared with 2016 and 2017 at the relatively low level of copper content in soils of the industrial area of the city allows to exclude oil refineries from the list of its major anthropogenic sources.

scholarly journals Effect of modified pomace on copper migration via riverbank soil in southwest China

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11844
Author(s):  
Lingyuan Chen ◽  
Touqeer Abbas ◽  
Lin Yang ◽  
Yao Xu ◽  
Hongyan Deng ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Copper Content ◽  
Soil Column ◽  
Column Experiment ◽  
Exchange Capacity ◽  
Soil Samples ◽  
Copper Accumulation ◽  
And Migration ◽  
Fruit Pomace ◽  
Iron Manganese

To explore the effects of modified pomace on copper migration via the soil on the banks of the rivers in northern Sichuan and Chongqing, fruit pomace (P) and ethylene diamine tetra-acetic acid (EDTA) modified P (EP) were evenly added (1% mass ratio) to the soil samples of Guanyuan, Nanbu, Jialing, and Hechuan from the Jialing River; Mianyang and Suining from the Fu River; and Guangan and Dazhou from the Qu River. The geochemical characteristics and migration rules of copper in different amended soils were simulated by column experiment. Results showed that the permeation time of copper in each soil column was categorized as EP-amended > P-amended > original soil, and the permeation time of amended soil samples at different locations was Jialing > Suining > Mianyang > Guangan > Dazhou > Nanbu > Guanyuan > Hechuan. Meanwhile, the average flow rate of copper in each soil column showed a reverse trend with the permeation time. Copper in exchangeable, carbonate, and iron–manganese oxide forms decreased with the increase of vertical depth in the soil column, among which the most evident decreases appeared in the carbonate-bonding form. The copper accumulation in different locations presented a trend of Jialing > Suining > Mianyang > Guangan > Dazhou > Nanbu > Guangyuan > Hechuan, and the copper content under the same soil showed EP-amended > P-amended > original soil. The copper proportion of the carbonate form was the highest in each soil sample, followed by the exchangeable form. The proportions of iron-manganese oxide and organic matter forms were relatively small. A significant correlation was observed between the cation exchange capacity and the copper content in exchangeable and carbonate forms. Moreover, total organic carbon and copper contents were negatively correlated.

High Parasitic Contamination of Soil Samples in the North of Iran: a Potential Risk of Parasitic Infection for Tourists

2020 ◽  
Vol 20 ◽  
Author(s):  
Beheshteh Haghparast-kenari ◽  
Tooran Nayeri ◽  
Shahabeddin Sarvi ◽  
Mohammad Taghi Rahimi ◽  
Ehsan Ahmadpour ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Urban Areas ◽  
Intestinal Parasites ◽  
Parasitic Infection ◽  
Animal Husbandry ◽  
Soil Samples ◽  
Human Society ◽  
Public Parks ◽  
The North ◽  
North Of Iran

Background: Soil-transmitted parasites (STPs) are significant intestinal parasites that infect humans and animals and impose considerable burdens on human society and animal husbandry industries. Therefore, the present study aimed to determine the prevalence of parasitic elements of soil samples collected from the north of Iran. Methods: A total of 256 soil samples were collected from public parks, public places, vegetable gardens, sand heaps, and shadow areas near houses in the north of Iran and examined using the sucrose flotation method. Results: Out of 256 examined samples, 131 (51.2%) ones showed parasitic contamination including larvae (43%), oocysts (14.1%), and different eggs (6.6%). According to the results, the most and least common parasites observed in the samples were larvae (43%), as well as Toxascaris leonina, and Trichuris trichiura (0.4%), respectively. Moreover, the most and least contaminated locations were sand heaps (62.5%) and shadow areas near houses (45.6%), respectively. Regarding cities, Behshahr (68.3%) and Sari (67.5%) had the highest contaminated soil samples, whereas Chalus (37.5%) showed the lowest contamination. On the other hand, rural samples showed more contamination, compared to urban areas (P< 0.05). Conclusion: The findings of the present study indicate that the overall prevalence of STPs in examined areas and highly contaminated soil samples can be considered as a potential source of human contamination particularly tourists with STPs.

scholarly journals Study of Temporal Variations of Equivalent Black Carbon in a Coastal City in Northwest Spain Using an Atmospheric Aerosol Data Management Software

2021 ◽  
Vol 11 (2) ◽  
pp. 516
Author(s):  
María Piñeiro-Iglesias ◽  
Javier Andrade-Garda ◽  
Sonia Suárez-Garaboa ◽  
Soledad Muniategui-Lorenzo ◽  
Purificación López-Mahía ◽  
...  
Keyword(s):  
Data Management ◽  
Black Carbon ◽  
Light Absorption ◽  
Atmospheric Aerosol ◽  
Urban Areas ◽  
Radiative Properties ◽  
Anthropogenic Sources ◽  
Biomass Combustion ◽  
Management Support ◽  
Diurnal Variability

Light-absorbing carbonaceous aerosols (including black carbon (BC)) pose serious health issues and play significant roles in atmospheric radiative properties. Two-year measurements (2015–2016) of aerosol light absorption, combined with measurements of sub-micrometric particles, were continuously conducted in A Coruña (northwest (NW) Spain) to determine their light absorption properties: absorption coefficients (σabs) and the absorption Ångström exponent (AAE). The mean and standard deviation of equivalent black carbon (eBC) during the period of study were 0.85 ± 0.83 µg m−3, which are lower than other values measured in urban areas of Spain and Europe. High eBC concentrations found in winter are associated with an increase in emissions from anthropogenic sources in combination with lower mixing layer heights and frequent stagnant conditions. The pronounced diurnal variability suggests a strong influence from local sources. AAE had an average value of 1.26 ± 0.22 which implies that both fossil fuel combustion and biomass burning influenced optical aerosol properties. This also highlights biomass combustion in suburban areas, where the use of wood for domestic heating is encouraged, as an important source of eBC. All data treatment was gathered using SCALA© as atmospheric aerosol data management support software program.

scholarly journals Detection of Beta-Lactam-Resistant Escherichia coli and Toxigenic Clostridioides difficile Strains in Wild Boars Foraging in an Anthropization Gradient

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1585
Author(s):  
Laila Darwich ◽  
Chiara Seminati ◽  
Jorge R. López-Olvera ◽  
Anna Vidal ◽  
Laia Aguirre ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Disease Transmission ◽  
Urban Areas ◽  
Carbapenem Resistance ◽  
Anthropogenic Sources ◽  
Health Concern ◽  
Natural Environments ◽  
Beta Lactam ◽  
Wild Boars ◽  
Clostridioides Difficile

Disease transmission among wild boars, domestic animals and humans is a public health concern, especially in areas with high wild boar densities. In this study, fecal samples of wild boars (n = 200) from different locations of the Metropolitan Area of Barcelona were analyzed by PCR to explore the frequency of β-lactamases and extended cephalosporin and carbapenem resistance genes (ESBLs) in Escherichia coli strains and the presence of toxigenic Clostridioides difficile. The prevalence of genes conferring resistance to β-lactam antimicrobials was 8.0% (16/200): blaCMY-2 (3.0%), blaTEM-1b (2.5%), blaCTX-M-14 (1.0%), blaSHV-28 (1.0%), blaCTX-M-15 (0.5%) and blaCMY-1 (0.5%). Clostridioides difficile TcdA+ was detected in two wild boars (1.0%), which is the first report of this pathogen in wild boars in Spain. Moreover, the wild boars foraging in urban and peri-urban locations were more exposed to AMRB sources than the wild boars dwelling in natural environments. In conclusion, the detection of E. coli carrying ESBL/AmpC genes and toxigenic C. difficile in wild boars foraging in urban areas reinforces the value of this game species as a sentinel of environmental AMRB sources. In addition, these wild boars can be a public and environmental health concern by disseminating AMRB and other zoonotic agents. Although this study provides the first hints of the potential anthropogenic sources of AMR, further efforts should be conducted to identify and control them.

scholarly journals Seasonal variation and spatial distribution of carbonaceous aerosols in Taiwan

2010 ◽  
Vol 10 (19) ◽  
pp. 9563-9578 ◽  
Author(s):  
C. C.-K. Chou ◽  
C. T. Lee ◽  
M. T. Cheng ◽  
C. S. Yuan ◽  
S. J. Chen ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Rural Areas ◽  
Urban Areas ◽  
Air Pollutants ◽  
Chemical Properties ◽  
Anthropogenic Sources ◽  
Carbonaceous Aerosols ◽  
Urban Rural ◽  
Southern Taiwan ◽  
Northern Taiwan

Abstract. To investigate the physico-chemical properties of aerosols in Taiwan, an observation network was initiated in 2003. In this work, the measurements of the mass concentration and carbonaceous composition of PM10 and PM2.5 are presented. Analysis on the data collected in the first 5-years, from 2003 to 2007, showed that there was a very strong contrast in the aerosol concentration and composition between the rural and the urban/suburban stations. The five-year means of EC at the respective stations ranged from 0.9±0.04 to 4.2±0.1 μgC m−3. In rural areas, EC accounted for 2–3% of PM10 and 3–5% of PM2.5 mass loadings, comparing to 4–6% of PM10 and 4–8% of PM2.5 in the urban areas. It was found that the spatial distribution of EC was consistent with CO and NOx across the network stations, suggesting that the levels of EC over Taiwan were dominated by local sources. The measured OC was split into POC and SOC counterparts following the EC tracer method. Five-year means of POC ranged from 1.8±0.1 to 9.7±0.2 μgC m−3 among the stations. It was estimated that the POM contributed 5–17% of PM10 and 7–18% of PM2.5 in Taiwan. On the other hand, the five-year means of SOC ranged from 1.5±0.1 to 3.8±.3 μgC m−3. The mass fractions of SOM were estimated to be 9–19% in PM10 and 14–22% in PM2.5. The results showed that the SOC did not exhibit significant urban-rural contrast as did the POC and EC. A significant cross-station correlation between SOC and total oxidant was observed, which means the spatial distribution of SOC in Taiwan was dominated by the oxidant mixing ratio. Besides, correlation was also found between SOC and particulate nitrate, implying that the precursors of SOA were mainly from local anthropogenic sources. In addition to the spatial distribution, the carbonaceous aerosols also exhibited distinct seasonality. In northern Taiwan, the concentrations of all the three carbonaceous components (EC, POC, and SOC) reached their respective minima in the fall season. POC and EC increased drastically in winter and peaked in spring, whereas the SOC was characterized by a bimodal pattern with the maximal concentration in winter and a second mode in summertime. In southern Taiwan, minimal levels of POC and EC occurred consistently in summer and the maxima were observed in winter, whereas the SOC peaked in summer and declined in wintertime. The discrepancies in the seasonality of carbonaceous aerosols between northern and southern Taiwan were most likely caused by the seasonal meteorological settings that dominated the dispersion of air pollutants. Moreover, it was inferred that the Asian pollution outbreaks could have shifted the seasonal maxima of air pollutants from winter to spring in the northern Taiwan, and that the increases in biogenic SOA precursors and the enhancement in SOA yield were responsible for the elevated SOC concentrations in summer.

scholarly journals Measurement report: Short-term variation in ammonia concentrations in an urban area increased by mist evaporation and emissions from a forest canopy with bird droppings

2020 ◽  
Vol 20 (20) ◽  
pp. 11941-11954
Author(s):  
Kazuo Osada
Keyword(s):  
Urban Areas ◽  
Forest Canopy ◽  
Anthropogenic Sources ◽  
Daily Maximum ◽  
Short Term ◽  
Daily Minimum ◽  
Bird Droppings ◽  
Morning Peak ◽  
Air Temperatures ◽  
Cloudy Weather

Abstract. Local meteorological conditions and natural and anthropogenic sources affect atmospheric NH3 concentrations in urban areas. To investigate potential sources and processes of NH3 variation in urban areas, hourly NH3 and NH4+ concentrations were measured during November 2017–October 2019 in Nagoya, a central Japanese megacity. Average NH3 concentrations are high in summer and low in winter. Daily minimum NH3 concentrations are linearly correlated with daily minimum air temperatures. By contrast, daily maximum NH3 concentrations increase exponentially with temperature, suggesting that different nighttime and daytime processes and air temperatures affect concentrations. Short-term increases in NH3 concentrations of two types were examined closely. Infrequent but large increases (11 parts per billion (ppb) for 2 h) occurred after mist evaporation during daytime. During 2 years of observations, only one event of this magnitude was identified in Nagoya, although evaporation of mist and fog occurs frequently after rains. Also, short-term increases occur with a large morning peak in summer. Amplitudes of diurnal variation in NH3 concentration (daily maximum minus minimum) were analyzed on days with nonwet and low wind conditions. Amplitudes were small (ca. 2 ppb) in winter, but they increased from early summer along with new leaf growth. Amplitudes peaked in summer (ca. 20 ppb) because of droppings from hundreds of crows before roosting in trees on the campus. High daily maximum NH3 concentrations were characterized by a rapid increase occurring 2–4 h after local sunrise. In summer, peak NH3 concentrations at around 08:00 local time (LT) in sunny weather were greater than in cloudy weather, suggesting that direct sunlight particularly boosts the morning peak. Daily and seasonal findings related to the morning peak imply that stomatal emission at the site causes the increase. Differences between daily amplitudes during the two summers was explained by the different input amounts of reactive nitrogen from bird droppings and rain, suggesting that bird droppings, a temporary rich source of NH3, affected the small forest canopy.

scholarly journals Hazard indicators of urban soil contamination with polycyclic hydrocarbons on the example of monitoring results of the RUDN campus

2020 ◽  
Vol 28 (2) ◽  
pp. 112-130
Author(s):  
Margarita M. Redina ◽  
Alexander P. Khaustov ◽  
Xiangkai Li ◽  
Zhandos D. Kenzhin ◽  
Polina Yu. Silaeva
Keyword(s):  
Soil Contamination ◽  
Urban Areas ◽  
Carcinogenic Risk ◽  
Individual Characteristics ◽  
Forest Park ◽  
Pollution Levels ◽  
Sources Of Pollution ◽  
Functional Zones ◽  
Polycyclic Aromatic ◽  
The Individual

The characteristics of the hazard of urban soils pollution by polycyclic aromatic hydrocarbons (PAHs) are considered: naphthalene (Naph), anthracene (An), phenanthrene (Phen), pyrene (Py), fluoranthene (Flu), chrysene (Chr), benzo(a)anthracene (BaA), benzo[a]pyrene (BaP), benzo[b]fluoranthene (BbFlu), benzo[k]fluoranthene (BkFlu), dibenzo[ah]antracene (DBa), benzo[ghi]perylene (Bghi), indeno[1,2,3-c,d]pyrene). On the example of monitoring data on the RUDN University campus and the adjacent South-West Forest Park, modern approaches to assessing the hazard of pollution levels and the environmental risk of soil pollution are demonstrated: RQ indicators, total relative toxicity in comparison to BaP, carcinogenic risk, behavior of the representative PAHs. On the basis of a critical analysis of the pollution indicators, the optimal approaches to assessing the danger of the presence of polyarenes in the soils of urban areas are demonstrated. The leading sources of pollution (influence of vehicles) were identified. Different levels of environmental hazard of polyarene soil contamination in different functional zones of the analyzed territory are demonstrated: relatively clear territory in the middle zone of the park and a specific configuration of the pollution field on the rest of the territory. The necessity of developing ecosystem standards for urban natural complexes is justified, taking into account the individual characteristics of soils, the role of soil microbiota, the specificity of the use of the territory and the characteristics of pollution sources.

scholarly journals Geoecological Assessment of the State of Soils in Functional Zones of the Territory of the Eastern Administrative Okrug of Moscow, the Russian Federation

2021 ◽  
Vol 285 ◽  
pp. 06009
Author(s):  
S. V. Dubrova ◽  
I. I. Podlipskiy ◽  
P. S. Zelenkovskiy ◽  
P. I. Egorov ◽  
E. M. Nesterov
Keyword(s):  
Urban Development ◽  
The State ◽  
Point Of View ◽  
Functional Zone ◽  
Functional Zones ◽  
Preliminary Preparation ◽  
The Russian Federation ◽  
Functional Areas ◽  
Territorial Division ◽  
Functional Purpose

With the development of megalopolises, constant expansion of their borders and chaotic and – to a greater extent – unreasonable territorial division of lands, potential recreational areas are experiencing colossal anthropogenic load and can be found in the state of oppression, gradually moving into an industrial functional zone, from the environmental point of view. For the preservation of ecosystems and rational planning of urban development, it is necessary to pay special attention to the functional purpose and mode of use of the sites, which are the essence of zoning and governance in the field of urban development of land. This paper presents a geoecological assessment of the dynamics of changes in pollution halos among the functional areas of the Eastern Administrative Okrug of Moscow over the past 30 years. Geochemical series of pollutants were compiled with the help of methods of preliminary preparation and statistical data processing. A forecast of the spread of pollution in the surface horizon for the next 100 years is presented, taking into account the hydrogeological features of the territory of the Eastern Administrative Okrug of Moscow.

scholarly journals Diversity ofLeptospiraspp. in Rats and Environment from Urban Areas of Sarawak, Malaysia

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Chai Fung Pui ◽  
Lesley Maurice Bilung ◽  
Kasing Apun ◽  
Lela Su’ut
Keyword(s):  
Polymerase Chain Reaction ◽  
Water Samples ◽  
Urban Areas ◽  
Environmental Samples ◽  
Soil Samples ◽  
Chain Reaction ◽  
Prevalence Studies ◽  
Pcr Method ◽  
Polymerase Chain ◽  
Soil And Water

Various prevalence studies onLeptospirain animals and humans, as well as environmental samples, had been conducted worldwide, including Malaysia. However, limited studies have been documented on the presence of pathogenic, intermediate, and saprophyticLeptospirain selected animals and environments. This study was therefore conducted to detectLeptospiraspp. in rats, soil, and water from urban areas of Sarawak using the polymerase chain reaction (PCR) method. A total of 107 rats, 292 soil samples, and 324 water samples were collected from April 2014 to February 2015. PathogenicLeptospirawas present in 5.6% (6/107) of rats, 11.6% (34/292) of soil samples, and 1.9% (6/324) of water samples. IntermediateLeptospirawas present in 2.7% (8/292) of soil samples and 1.9% (6/324) of water samples. SaprophyticLeptospirawas present in 10.3% (11/107) of rats, 1.4% (4/292) of soil samples, and 0.3% (1/324) of water samples. From this study, 76Leptospiraspp. were isolated. Based on DNA sequencing, the dominantLeptospiraspp. circulating in urban areas of Sarawak are pathogenicLeptospira noguchii, intermediateLeptospira wolffiiserovar Khorat, and saprophyticLeptospira meyeri, respectively. Overall, this study provided important surveillance data on the prevalence ofLeptospiraspp. from rats and the environment, with dominant local serovars in urban areas of Sarawak.

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