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The Study of Peri-Urban Soil Contamination in the Kenitra Region, Morocco–Characterization and Assessment Using a Statistical Approach

El Idrissi Yahya, Mabrouki Jamal, Baghdad Bouamar, El Belghiti Mohammed Alaoui, El Azzouzi Mohammed, El Hasini Soukaina, El Mekkaoui Abdelali, Hassani Kenza Kadiri, El Azzouzi Elhabib

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 4

143--157

The peri-urban solid waste in the Kenitra region is experiencing a significant change in terms of quantity and quality. High concentrations of both inorganic and organic materials are present in these wastes, posing a significant threat of pollution. This research sought to analyze the extent of soil contamination by heavy metals, providing valuable insights to prompt proactive interventions and propose alternative solutions for sustainable waste management. The objective of this work was to study peri-urban soil contamination in the Kenitra region-Morocco. For that purpose, several soil contamination indicators were analyzed, namely: nitrogenous, fertilizer and heavy metals concentration, soil pH, etc. The analyzed soil samples were taken from water from the different points at the levels of the studied region. The analysis shows that the studied soils are polluted with Zn, Mg, Cu, Ni, Cr, Cd, Pb, and other chemical elements. The results obtained suggest a correlation between soil pollution and the concentrations of the measured heavy metals. Furthermore, the analysis shows that heavy metals, contamination is particularly related to the presence of lead, cadmium, and zinc. The zinc contamination in the soil is about 390 mg/kg for a standard of between 0.2 and 2 mg/kg. Lead concentrations are 53 mg/kg for a standard of 0.3 mg/kg. On the basis of Moroccan standards, the soil is contaminated by lead, cadmium, and zinc.

Physico-Chemical Characterization and Quality of Agricultural Soils in the Zaër Region (Morocco)

El Omari Mariyam, Aziane Nadia, Zerdeb Mohammed Amine, Naoui Basma, El Mekkaoui Abdelali, Akhlidej Nouhaila, Oubbih Jamal, Chakiri Saïd, Amahmid Omar, Zouahri Abdelmjid

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 8

155--171

This qualitative study of the soils of the Zaër region is part of a context of good development, preservation and sustainability of agricultural soils. Its aim is to establish a reference framework for the physico-chemical characteristics of the region’s agricultural soils. It was based on a spring sampling campaign carried out in 2021. Composite samples taken from thirteen sites with diverse soils were analysed in the laboratory. The soil analysis results were compared with reference values. The soils examined were moderately acidic to moderately alkaline, with low levels of organic matter. Nevertheless, concentrations of exchangeable calcium and magnesium were found to be sufficient, while sodium levels were very low. Furthermore, cation exchange capacity was low in spring, reflecting the soil’s high and low nutrient retention capacity respectively. Phosphorus and potassium levels appear to be low. In the light of these results, the use of organic and mineral fertilisers and calcium amendments is strongly recommended to improve agricultural quality and productivity in the region studied.