Research Article
Use of Lomo-Nord Shales in Ivory Coast for the Adsorption Treatment of Humic Acid Extracted from Leachate from the Akouédo Landfill
Issue:
Volume 13, Issue 2, April 2025
Pages:
49-60
Received:
28 January 2025
Accepted:
19 February 2025
Published:
22 May 2025
Abstract: The environmental pollution caused by the mismanagement of household waste dumps and their leachate in developing countries has led researchers to explore adsorption treatment processes using shales from Côte d'Ivoire. To carry out this study, mineralogical characterization by X-ray Diffraction and Infrared of the shales was required prior to treatment. Using humic acid extracted from the leachates, adsorption tests were carried out using batch adsorption tests, and the optimum adsorption parameters were determined and modeled. The results of the mineralogical characterization revealed the presence of certain minerals. Batch adsorption treatment using slate from Côte d'Ivoire showed that the optimum concentration of slate to use was 30 g/L for a concentration of 15 mg/L humic acid. The duration of agitation at equilibrium was 60 minutes, with a maximum adsorption rate of 92 %. The effect of pH on the adsorption of humic acids showed that, in general, the evolution of adsorption rates was inversely proportional to the increase in pH. The highest yields were obtained at pH levels between 3.5 and 5.5. The results of the influence of the initial concentration of humic acids showed an increase in adsorption efficiency with the increase in the initial concentration up to 100 mg/L. The pseudo-second order model better described the adsorption of humic acid on the shale; it is accompanied by intra-particle diffusion, therefore by a contribution of active sites inside the pores.
Abstract: The environmental pollution caused by the mismanagement of household waste dumps and their leachate in developing countries has led researchers to explore adsorption treatment processes using shales from Côte d'Ivoire. To carry out this study, mineralogical characterization by X-ray Diffraction and Infrared of the shales was required prior to treat...
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Research Article
Assessing the Extent of Noise Pollution in Laxmipur District Town, Bangladesh
Ahmad Kamruzzaman Majumder*
,
Md. Taiful Arefin Bhuiyan
Issue:
Volume 13, Issue 2, April 2025
Pages:
61-73
Received:
23 April 2025
Accepted:
6 May 2025
Published:
20 June 2025
DOI:
10.11648/j.ijema.20251302.12
Downloads:
Views:
Abstract: Noise pollution is a concerning issue in Bangladesh due to its impact on human health. It is increasing in Laxmipur District Town in recent years due to the introduction of a number of different vehicles. Some vehicles, particularly rickshaws and auto-rickshaws, may use outdated mechanical horns, exacerbating the noise, the use of heavy machinery for construction, and the unregulated use of loudspeakers in social, religious, and political events and public announcements. The current study has been carried out to assess the extent of noise pollution in various areas of Laxmipur District Town. 7 different zones, along with 45 locations, were selected in Laxmipur District Town based on land use. A sound level meter (REED SD-4023) was used to monitor noise levels in Laxmipur District Town from January 01, 2021, to April 30, 2021. At each sampling location, several samples were collected. Three times a day, we have measured the noise level in every location. The mean noise pollution level and Leq of Laxmipur District Town were determined to be 68.78 dBA and 92.46 dBA, respectively. The measured mean and Leq values were 69.11 dBA and 89.00 dBA for silent areas, 67.76 dBA and 79.34 dBA for residential areas, 76.75 dBA and 82.32 dBA for mixed areas, 70.90 dBA and 81.07 dBA for commercial areas, 67.57 dBA and 95.70 dBA for industrial areas, 74.28 dBA and 87.29 dBA for road intersections, and 64.49 dBA and 75.40 dBA for village areas, respectively. The hierarchy in different land uses based on mean noise level was Mixed Areas > Road Intersection > Commercial Area > Silent Area > Residential Area > Industrial Area > Village Area. The three highest noise-polluted areas were Rehana Food (105.62 dBA), Titakha Mosjid-2 (98.49 dBA), and Dalal Bazar (96.75 dBA), whereas the three lowest noise-polluted areas were Vumi Office (58.51 dBA), Banchan Nogor (61.38 dBA), and Hi Food (66.19 dBA), based on Leq. However, a study found that every sample location's noise level exceeded the national guideline.
Abstract: Noise pollution is a concerning issue in Bangladesh due to its impact on human health. It is increasing in Laxmipur District Town in recent years due to the introduction of a number of different vehicles. Some vehicles, particularly rickshaws and auto-rickshaws, may use outdated mechanical horns, exacerbating the noise, the use of heavy machinery f...
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