The study of agri-soil quality and pollution by heavy metals especially Cr (VI) in Djelfa city

TEFFAH IMANE, DERRAGUI NOURELHOUDA

dc.contributor.author	TEFFAH IMANE, DERRAGUI NOURELHOUDA
dc.date.accessioned	2025-07-20T09:47:24Z
dc.date.available	2025-07-20T09:47:24Z
dc.date.issued	2025
dc.identifier.uri	http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/7766
dc.description	Based on our experimental results, we reached the following conclusions:  Physical and chemical analyses of soil properties (OM, pH, EC, WC) showed that they are directly related to the level of Cr (VI) concentration in the soil.  Cr (VI), EC and OM were the most important factors in explaining the variation of soil properties between samples.  Relatively high levels of Cr (VI) were recorded at some sites, indicating the presence of pollution sources.  High concentrations of Cr (VI) were associated with soils with lower pH values, indicating increased metal mobility under these conditions.  Low concentrations of Cr (VI) were recorded in soils with acidic pH values, indicating the oxidation of chromium to its less toxic counterpart chromium (III).  Organic matter contributes to the stabilization and transformation of Cr (VI) in the soil. As perspectives of this work, we suggest to do deep research on hexavalent chromium distribution and effects on flora and fauna, and also, we think that a proposition of Cr (VI) removal method will be a good continuation of this subject. It may be a good idea if we apply AI to predict the Cr (VI) pollution in the future and to find solutions for this problem	en_EN
dc.description.abstract	Soil can retain heavy metals originating from various sources, especially Cr (VI), which in turn poses a risk to humans and the environment and this risk leads to the need to evaluate soil properties. In this study, soil quality, physicochemical properties and the extent of hexavalent chromium contamination were assessed. Samples were taken from multiple locations in the city of Djelfa (agricultural, industrial and residential areas) and were analyzed in the laboratory, including pH measurement to determine soil reactivity, organic matter and water content as indicators of fertility level, electrical conductivity reflecting soil salinity, and hexavalent chromium concentration using UV-visible technique to determine the degree of contamination. Based on the experimental procedure, the results obtained indicated the average pH (7.64), OM (3.91%), WC (5.38%), EC (0.1mS/cm) and Cr (8.28mg/kg). Then, the relationship of soil properties on Cr(VI) concentration was evaluated based on the external influences on the sample site, where we found that both organic matter and pH increase the deposition, oxidation and reduction of Cr(VI) in the soil, and pollution sources such as car smoke, tanning and fertilizers positively affect the increase in Cr(VI) concentration.	en_EN
dc.language.iso	en	en_EN
dc.publisher	Université Ziane Achour – Djelfa – Faculté des Sciences de la Nature et de la Vie	en_EN
dc.subject	Heavy metals (HMs), Cr(VI), agricultural soil properties, Cr(VI) contamination, Cr(III), pH, organic matter OM, moisture WC, electrical conductivity EC	en_EN
dc.title	The study of agri-soil quality and pollution by heavy metals especially Cr (VI) in Djelfa city	en_EN
dc.title.alternative	Food Industry and Quality Control	en_EN
dc.type	Thesis	en_EN