Effects of waste dumpsites on geotechnical properties of the underlying soils in wet season

Abstract

Indiscriminate disposal of waste and citation of open dumpsites are some of the key factors affecting the various soil geotechnical properties. Atterberg limit and consolidation tests were conducted to determine the effects of two open waste dumpsites (Uselu Market and New Benin) on geotechnical properties of their underlying soils. Soil sample collected from Uselu Market dumpsite in Benin City metropolis showed slightly lower hydraulic conductivity (K) of 1.0 × 10 -6 with plasticity index of 18.53% compared to sample collected 1.6 m from the same dumpsite which had high K value of 2.42 × 10 -3 with plasticity index of 6.9%. Soil sample collected from New Benin dumpsite in Benin City metropolis showed slightly lower K of 1.45 × 10 -6 with plasticity index of 13.8% than sample collected 1.6 m from the same dumpsite which had high K value of 2.14 × 10 -2 with plasticity index of 6.0%. X-ray florescent analyser (X-MET 7000) and direct soil pH meter were used to determine the composition of the aforementioned soil samples. The result of samples collected from both dumpsites indicated a low hydraulic conductivity compared to samples collected 1.6 m from both dumpsites. Also, the chemical composition and pH of both dumpsite underlying soils indicated high level of soil contaminants with pH of 3.3 and 3.5 which is very acidic unlike pH of other samples which were in the neutral range (6.8-7.1). Hence, a liner is recommended for all dumpsites or engineered landfill systems to mitigate against the challenges associated with open waste dumping system in the environment.

Is Awareness on Plastic Pollution Being Raised in Schools? Understanding Perceptions of Primary and Secondary School Educators

“…there are dustbins and a site where plastics and other waste are burnt." This is despite several studies [48,49] highlighting that plastic waste incineration was a major source of air pollution, and~12% of plastics burnt released toxic pollutants which impact the climate, and threaten plant, animal and human health.…”

Engineering Properties of High-Volume Fly Ash Modified Cement Incorporated with Bottle Glass Waste Nanoparticles

“…The current annual reuse of ash worldwide ranges from 3% to 57%, depending on the country; however, it averages at approximately 16% [17], with the remainder sent to garbage dumps or landfills. Heavy metals, such as cadmium and lead, can easily leak from ash landfills into soil and groundwater, where they can remain as contaminants for thousands of years [18].…”

Assessment of The Geotechnical Properties of Municipal Solid Waste and Its Effect on The Surrounding Soil: A Review

“…These heavy metals, which sedimented in soil matrix, restrict water movement through soil, reducing soil hydraulic conductivity [23]. Essienubong et al, [28] also indicated that the soil sample gathered from each of the Uselu Market and New Benin dumpsites presented lower hydraulic conductivity than the samples collected away from the dumpsites. This outcome might be because of clogging impact by organic waste that could happen because of the biological material build-up and growth of microorganisms during waste degradation.…”

“…The age and type of the contaminants would impact the geotechnical characteristics of the soil well [22]. The studies performed by Raman & Sathiya Narayanan, [2], Ali et al, [9] Azeez et al, [10], Emeka et al, [11], Sharma et al, [14], Harun et al, [17], Thakur et al, [23], Sujatha et al, [24], Frempong & Yanful, [25], Nayak et al, [26], Mohammed et al, [27], Essienubong et al, [28] revealed that the physical and mechanical characteristics of contaminated soils were changed compared to the uncontaminated soils. Thus, assessing the impact of waste on soil engineering properties is an import issue and should be taken into consideration in the evaluation of the stability of landfill systems.…”