The influence of anthropogenic activities on wetland integrity dynamics: a case study of the Rwampara wetland in Rwanda

2021 ◽  
Author(s):  
Richard Mind’je ◽  
Mapendo Mindje ◽  
Patient Mindje Kayumba
Keyword(s):  
Anthropogenic Activities

scholarly journals A Dieldrin Case Study: Another Evidence of an Obsolete Substance in the European Soil Environment

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 314
Author(s):  
Petros Tsiantas ◽  
Evangelia N. Tzanetou ◽  
Helen Karasali ◽  
Konstantinos M. Kasiotis
Keyword(s):  
Active Substance ◽  
Anthropogenic Activities ◽  
Carcinogenic Risk ◽  
The European Union ◽  
Soil Environment ◽  
Single Application ◽  
Environmental Concentration ◽  
Tandem Mass Spectrometric ◽  
Potential Use

Soil constitutes a central environmental compartment that, due to natural and anthropogenic activities, is a recipient of several contaminants. Among them, organochlorine pesticides are of major concern, even though they have been banned decades ago in the European Union, due to their persistence and the health effects they can elicit. In the presented work, a gas chromatographic tandem mass spectrometric (GC-MS/MS) developed method was applied to soil samples after the suspected and potential use of formulations containing organochlorine active substance. One soil sample was positive to dieldrin at 0.018 mg kg−1. Predicted environmental concentration in soil (PECsoil) considering a single application of this active substance potentially attributed the finding in its past use. The subsequent health risk assessment showed negligible non-carcinogenic risk and tolerable carcinogenic risk. The latter signifies that repetitive and prolonged sampling can unveil the pragmatic projection of persistent chemicals’ residues in the soil.

scholarly journals Microplastics Determination in the Rivers with Different Urbanisation Variances: A Case Study in Kuching City, Sarawak, Malaysia

2020 ◽  
Vol 10 (2) ◽  
pp. 116-125
Author(s):  
Georgina Johnson ◽  
Wen San Hii ◽  
Samuel Lihan ◽  
Meng Guan Tay
Keyword(s):  
Anthropogenic Activities ◽  
River System ◽  
Anthropogenic Activity ◽  
Domestic Waste ◽  
Shape Identification ◽  
Suburban Areas ◽  
Sampling Locations ◽  
The Relationship ◽  
Main Factor

The presence of microplastics in aquatic systems is mainly due to the anthropogenic activities such as domestic waste dumping. Undeniably, rivers either in urban or suburban areas are always a waste dumpling sites from the surrounding residences. Thus, the purpose of this study was to determine the relationship between microplastic abundance and different degree of urbanization across Kuching in Sarawak. Three sampling locations with different degrees of urbanisation had been studied across Kuching. A total of 137 pieces of microplastics were collected along the study and analysed using stereoscopic microscope for the shape identification and FTIR spectrophotometer for functional groups present in the microplastics. Filament was the most abundant microplastics shape found, whereas the IR results showed that ethylenevinylacetate (9%), polyamides or nylon (15%), polypropylene (42%), poly(methylmethacrylate) (16%) and polystyrene (18%) were found in the study. The most abundant microplastics in the water samples was polypropylene (42%), whereas ethylenevinylacetate (9%) was the least. The degree of urbanisation does not directly relate to the microplastic present in the river system in Kuching City, but the anthropogenic activity is the main factor that affecting the microplastic abundance in the river.   Keywords: anthropologenic activity, FTIR, microplastics, polymer identification, urban, sub-urban

Effects of anthropogenic activities in a Mediterranean coastland: the case study of the Falerno-Domitio littoral in Campania, Tyrrhenian Sea (southern Italy)

2016 ◽  
Vol 112 (1-2) ◽  
pp. 271-290 ◽  
Author(s):  
Giuseppina Balassone ◽  
Giuseppe Aiello ◽  
Diana Barra ◽  
Piergiulio Cappelletti ◽  
Alberto De Bonis ◽  
...  
Keyword(s):  
Southern Italy ◽  
Anthropogenic Activities ◽  
Tyrrhenian Sea

scholarly journals Assessment of the Incidence of Enteric Adenovirus Species and Serotypes in Surface Waters in the Eastern Cape Province of South Africa: Tyume River as a Case Study

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Timothy Sibanda ◽  
Anthony I. Okoh
Keyword(s):  
Surface Waters ◽  
Anthropogenic Activities ◽  
Sampling Site ◽  
Eastern Cape ◽  
Conventional Pcr ◽  
Treated Sewage ◽  
Sampling Points ◽  
Enteric Adenovirus ◽  
Treatment Facilities

TaqMan real-time PCR was used for the detection and quantitation of adenoviruses in Tyume River water samples over a 12-month period. A total of 72 samples were analysed, and 22 samples were positive for adenovirus. Of the positive samples, 18 were collected from downstream sampling points. Among the downstream sampling points, adenovirus detection rate increased with distance downstream, being 28%, 33%, and 39% for Alice, Drayini, and Manqulweni, respectively. The Alice sampling site had the highest concentrations of adenovirus ranging between6.54×103 genome copies/L and8.49×104 genome copies/L. The observed trend could have been expected considering the level of anthropogenic activities in areas along the lower stretch of Tyume River, with the major one being the effluent of treated and semi treated sewage from wastewater treatment facilities. Adenovirus detection was sporadic at most sampling sites. Multiplex conventional PCR was used for the detection of clinically important adenovirus species B, C, and F and their serotypes. Species C and F adenoviruses were detected in 77% and 18% of the samples, respectively. Most adenovirus positive samples were obtained from areas of increased population densities. The presence of adenoviruses may confirm the risk of its transmission to the human population.

Impacts of river regulation and other anthropogenic activities on floodplain vegetation: A case study from Sri Lanka

2017 ◽  
Vol 18 (2) ◽  
pp. 203-213
Author(s):  
S. L. Rajakaruna ◽  
K. B. Ranawana ◽  
A. M. T. A. Gunarathne ◽  
H. M. S. P. Madawala
Keyword(s):  
Sri Lanka ◽  
Anthropogenic Activities ◽  
River Regulation ◽  
Floodplain Vegetation

scholarly journals Environmental and Health Risk of Hydrogen Sulphide (H2S) Levels Around some Dumpsites in the Niger Delta Region: A Case Study of Yenagoa Metropolis

2019 ◽  
Vol 1 (3) ◽  
pp. 1-6
Author(s):  
Tariwari C.N Angaye ◽  
Koru J. Alagoa
Keyword(s):  
Air Quality ◽  
Hydrogen Sulphide ◽  
Global Climate ◽  
Anthropogenic Activities ◽  
Wet Season ◽  
Niger Delta Region ◽  
Spatial Level ◽  
H2s Emission ◽  
Global Threat

Emission of Hydrogen Sulphide (H2S) from dumpsites has become a global threat due to its impact on global climate change. This study assessed the spatial and seasonal levels of H2S emissions from 6 dumpsites (LA - LF), with portable air quality meter (AEROQUAL-Series 300). Results showed that the spatial level of H2S ranged from 1.40 ppm - 14.34 ppm. Based on seasonal variation level of H2S ranged from 1.88 ppm – 3.86 ppm (p<0.05), with higher values in wet season. Meanwhile H2S were not detected in the control station (LX). Based on model for Air Quality Index (AQI), H2S emission was predominantly rated as safe and moderate, except for the two stations in the central dumpsite (LE and LF). These results confirmed the emission of H2S from the dumpsite due to anthropogenic activities. We therefore recommend policies aimed at sequestration of H2S, by the reduce, reuse and recycle policy of waste stream.

scholarly journals Heavy metal constituent of medicinal plants: a case study of Moringa oleifera Lam. from selected areas in Accra, Ghana

2021 ◽  
Vol 2 (1) ◽  
pp. 181-188
Author(s):  
Michael Lartey ◽  
Samuel Frimpong-Manso ◽  
Prince Osei Banahene ◽  
Adolphina Addo-Lartey ◽  
Nathaniel N A Okine ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Moringa Oleifera ◽  
Anthropogenic Activities ◽  
Total Concentration ◽  
Natural Habitat ◽  
Herbal Medicines ◽  
Translocation Factor ◽  
Sample Collection ◽  
Moringa Oleifera Lam

Background: Anthropogenic activities release metals into the environment that could be absorbed by plants and assimilate into herbal medicines. Objective: This study sought to correlate the outcome of anthropogenic activities that release metals into the environment with levels of metals in medicinal plants using the leaves of Moringa oleifera Lam. (M. oleifera)as a case study. Methods: Leaves of M. oleifera and soil around sampled plants were collected from three locations in the Accra Metropolis: a commercial area, an area with dense vehicular traffic, and a quasi-natural habitat. Samples were analyzed with Energy Dispersive X-ray Fluorescence (ED-XRF) spectroscopy for the presence and levels of arsenic (As), cobalt (Co), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), vanadium (V) and zinc (Zn). Statistical analyses were performed and the correlation between metal concentrations in leaves and soil was assessed using Spearman’s correlation coefficient. Results: Levels of metals in the leaves and soil samples varied with the site of sample collection. Levels of metals in leaves were significantly lower than permissible limits (p< 0.05) in herbal medicines. Translocation factor (TF) estimates indicated that the M. oleifera leaves exclude the metals under investigation irrespective of the site of collection. However, the TF > 1 in the case of Zn from the quasi-natural habitat signifying bioaccumulation in the leaves. Except forCo, the total concentration of each metal in the soil was not correlated with its concentration in the leaves. Conclusion: The concentration of sampled metals in the leaves and soil varied with the site of sampling and potentially with the anthropogenic activities that release metals into that environment.

Sign in / Sign up

Export Citation Format

Share Document