Assessment of Arsenic, Lead, Mercury and Cadmium Pollution in Soils, Sediments and Mining Residues of the Lite-Bala Site Using the GRADSOD Approach  

作　　者：Ngalula Stéphane Mbuyamba Dinangayi Dorothée Tshilanda Tshimankinda Pius Mpiana Koto-Te-Nyiwa Ngbolua Christophe Kaki Ngalula Stéphane Mbuyamba;Dinangayi Dorothée Tshilanda;Tshimankinda Pius Mpiana;Koto-Te-Nyiwa Ngbolua;Christophe Kaki(Department of Chemistry and Industry, Faculty of Science and Technology, University of Kinshasa, Kinshasa, Democratic Republic of the Congo;Department of Biology, Faculty of Science and Technology, University of Kinshasa, Kinshasa, Democratic Republic of the Congo;Department of Earth Sciences, Faculty of Science and Technology (FAST), University of Abomey-Calavi, Abomey-Calavi, Benin)

机构地区：[1]Department of Chemistry and Industry, Faculty of Science and Technology, University of Kinshasa, Kinshasa, Democratic Republic of the Congo [2]Department of Biology, Faculty of Science and Technology, University of Kinshasa, Kinshasa, Democratic Republic of the Congo [3]Department of Earth Sciences, Faculty of Science and Technology (FAST), University of Abomey-Calavi, Abomey-Calavi, Benin

出　　处：《Open Journal of Soil Science》2025年第2期136-155,共20页土壤科学期刊(英文)

摘　　要：This study evaluates the trace element contents (cadmium, lead, mercury and arsenic) in soils, sediments and rock residues of the artisanal gold mining site of Lite-Bala in the Democratic Republic of Congo. Random sampling, physicochemical analysis and analysis of total and soluble trace elements by ICP-OES spectrometry as well as calculations of pollution indices (FE and Igeo) and partition coefficient (kd) were carried out in two areas in the dry season and in the rainy season. The soils and sediments of the site are acidic, oxidizing, poor in organic carbon with clayey to sandy textures. Artisanal gold mining at Lite-Bala does not affect, to date, the cadmium, lead, mercury and arsenic contents of soils and sediments. On the other hand, the presence of these elements in rock residues, even in low levels, and the mechanization of this exploitation will have an impact on them in the long term;in particular for Hg used as an input and whose levels are close to the higher standard in surface soils.This study evaluates the trace element contents (cadmium, lead, mercury and arsenic) in soils, sediments and rock residues of the artisanal gold mining site of Lite-Bala in the Democratic Republic of Congo. Random sampling, physicochemical analysis and analysis of total and soluble trace elements by ICP-OES spectrometry as well as calculations of pollution indices (FE and Igeo) and partition coefficient (kd) were carried out in two areas in the dry season and in the rainy season. The soils and sediments of the site are acidic, oxidizing, poor in organic carbon with clayey to sandy textures. Artisanal gold mining at Lite-Bala does not affect, to date, the cadmium, lead, mercury and arsenic contents of soils and sediments. On the other hand, the presence of these elements in rock residues, even in low levels, and the mechanization of this exploitation will have an impact on them in the long term;in particular for Hg used as an input and whose levels are close to the higher standard in surface soils.

关 键 词：Pollution SPECTROMETRY Natural Enrichment Geoaccumulation Pollutant Indicators Lite-Bala 

分 类 号：P59[天文地球—地球化学]