Research Article
Quantification of Soil Erosion Using Remote Sensing and GIS: The Case of the Anguededou Watershed
Issue:
Volume 15, Issue 2, April 2026
Pages:
51-59
Received:
16 February 2026
Accepted:
28 February 2026
Published:
12 March 2026
Abstract: The Anguededou watershed belongs to the Anguededou river hydrographic system. It is located in the Abidjan district in southern Côte d’Ivoire. The present study aims to quantify water erosion of soils in the Anguededou watershed using remote sensing and GIS. The USLE (Universal Soil Loss Equation) model was chosen to quantify and spatialize water erosion processes at the watershed scale. This model, already implemented in different environments and at different scales, takes into account five determining factors in erosion processes, including: the aggressiveness of rainfall, the erodibility of soils, the inclination and length of the slope, as well as the vegetation cover and the means put in place to combat soil erosion. This study is part of a sustainable management approach for peri-urban watersheds. The result from the combination of the different factors indicates a soil loss on the Anguededou watershed which varies from 0 to 250 t/ha/year with an average of 41.27t/ha/year. The results obtained allow the identification of areas at the basin scale where interventions are needed to limit soil degradation processes. Soil loss from upstream to downstream of the catchment area could contribute in the long term to pollution and silting of the lagoon, thus causing a drastic reduction in the water surface area.
Abstract: The Anguededou watershed belongs to the Anguededou river hydrographic system. It is located in the Abidjan district in southern Côte d’Ivoire. The present study aims to quantify water erosion of soils in the Anguededou watershed using remote sensing and GIS. The USLE (Universal Soil Loss Equation) model was chosen to quantify and spatialize water e...
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Research Article
Efficient Removal of Methyl Red from Aqueous Solutions Using Chemically Modified Bentonite Clays: A Study of Adsorption Dynamics
Shailesh Kumar
,
Ashok Kumar Jha*
Issue:
Volume 15, Issue 2, April 2026
Pages:
60-66
Received:
15 February 2026
Accepted:
4 March 2026
Published:
21 April 2026
DOI:
10.11648/j.ajep.20261502.12
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Views:
Abstract: The extensive discharge of synthetic organic dyes from the textile and leather industries has become a major environmental concern due to their toxic, persistent, and non-biodegradable nature. Among these pollutants, methyl red dye poses significant risks to aquatic ecosystems and human health. The present study aims to evaluate the adsorption efficiency of cetyltrimethylammonium bromide (CTAB)-modified bentonite as a low-cost and effective adsorbent for the removal of methyl red from aqueous solutions. Bentonite powder was modified using 0.5 mol L-1 CTAB to enhance its surface properties and adsorption capacity. Batch adsorption experiments were carried out at pH 7 with initial dye concentrations ranging from 10 to 30 ppm. The adsorption process was monitored using UV–Vis spectrophotometry at a wavelength of 360 nm. The experimental results demonstrated excellent adsorption performance, with removal efficiencies exceeding 98% across all studied concentrations. A maximum removal efficiency of 99.62% was achieved at an initial concentration of 30 ppm within 90 minutes of contact time. The superior adsorption behavior is attributed to the increased surface area, mesoporous structure, and improved surface functionality resulting from CTAB modification. Structural and functional characterization using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) confirmed successful modification of bentonite and the interaction between dye molecules and active surface sites. Overall, the findings indicate that CTAB-modified bentonite is a promising, economical, and environmentally friendly adsorbent for the efficient removal of organic dyes from wastewater, offering potential application in sustainable wastewater treatment processes.
Abstract: The extensive discharge of synthetic organic dyes from the textile and leather industries has become a major environmental concern due to their toxic, persistent, and non-biodegradable nature. Among these pollutants, methyl red dye poses significant risks to aquatic ecosystems and human health. The present study aims to evaluate the adsorption effi...
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