Contamination, sources and environmental risk assessment of heavy metals in water, sediment and soil around an abandoned Pb mine site in North East Morocco

Nassiri, Oumayma; Rhoujjati, Ali; Hachimi, M.L. El

doi:10.1007/s12665-021-09387-y

Cited by 27 publications

(13 citation statements)

References 61 publications

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“…Cd, Cr, and Cu are considered the major contributors to contamination and toxicity in the investigated area. Many previous studies have been realized at other mines in Morocco and also reported abnormal accumulations of HMs accompanied by significant toxicity in soils and watercourse sediments, which often act simultaneously as a carrier and as secondary sources of pollutants in both the soil-plant and aquatic systems (Boularbah et al, 2006;Bouzekri et al, 2019;El Azhari et al, 2017;El Khalil et al, 2008;Khafouri et al, 2021;Nassiri et al, 2021b). In all of this, findings of the present investigation led to interesting conclusions on HM concentrations and their environmental toxicity in soils surrounding the Tansrift abandoned mine.…”

Section: Hm Contamination Assessmentsupporting

confidence: 69%

“…These HM pollutants in impoverished heaps and tailings were generally very mobiles due to their smaller dimensions and reactivity linked to the chemical nature of sulfides and sulfates. So, if it is not managed correctly, it could become a pollution source of water, groundwater and soil (Azzeddine & El Hassan, 2020;Bouzekri et al, 2020;Moyé et al, 2017;Nassiri et al, 2021a;Zouhri et al, 2019). It can then cause potential risk to human health via direct inhalation, ingestion, and dermal contact absorption (De Miguel et al, 2007;Tang et al, 2021;Yang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Environmental Pollution From Heavy Metals in Soils Surrounding the Abandoned Mine of Tansrift (Central High-Atlas, Morocco)

BARAKAT¹,

HARTI²,

ENNAJI³

2022

AgricultForest

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In this study, the heavy metal (HM) pollution status, possible sources, and potential ecological and health risk of heavy metals in soils around the Tansrift abandoned mine (Central High Atlas, Morocco) were investigated using the coefficient variation (CV), principal component analysis (PCA), enrichment factor (EF), geoaccumulation index (I geo ), Pollution Load Index (PLI), potential ecological risk index (RI), and total hazard index (HI). A total of 25 surface soil samples were collected and analyzed to determine the soil proprieties of magnetic susceptibility (MS), organic matter (OM) contents, texture, and the HM (Cd, Cr, Cu, Pb, and Zn) concentrations. The average metal concentrations of 7.74 (Cd), 64.19 (Cr), 333.59 (Cu), 29.95 (Pb), and 58.12 (Zn) mg/kg in soils are higher, except for Pb, than that of the local background and worldwide guidelines. The MS result showed that the soil magnetic material consisted of multidomain (MD), superparamagnetic (SP), and stable single domain (SSD) particles, which were derived from both natural and anthropogenic sources. Moreover, the statistical analysis indicated that Cu originated mainly from anthropogenic and lithologic sources such as agricultural practices, soil parent materials, and mineral dust and wastes from the Tansrift mine. In contrast, agricultural activities are the predominant origin for Cd, Cr, and Zn. EF values revealed a significant HM contamination of samples soils, which is in the order of Cd>Cu>Cr>Zn>Pb. The I geo and PLI results attested that soils were significantly affected by Cd, Cr and Cu toxic metal and, to a lesser degree, by Pb and Zn. According to the RI levels (12.07-1540.37), 40% of sampling sites were at considerable to high ecological risk, mainly influenced by Cd and Cu. Based on the HI values, the noncarcinogenic risk of HMs in studied soils could be neglected for adults but not for children. These findings showed the adverse HM effects on the environmental

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Section: Hm Contamination Assessmentsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Environmental Pollution From Heavy Metals in Soils Surrounding the Abandoned Mine of Tansrift (Central High-Atlas, Morocco)

BARAKAT¹,

HARTI²,

ENNAJI³

2022

AgricultForest

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“…Nevertheless, some of the sample sites (e.g., SD13, SD1, SD15, and SD6) are still strongly disturbed by mining activities, with the contribution of mining activities greater than 50%. Several pieces of research have also suggested that mining activities were the dominant anthropogenic Pb source in reservoir sediments [63,64]. It is noteworthy that mining activity-related Pb sources account for 66% of the significant outliers (SI11) in Figure 6.…”

Section: Pb Isotope Ratios and Source Apportionmentmentioning

confidence: 99%

“…This is also supported by the HCA results that, although both sample sites SI6 and SI11 are heavily contaminated (Table 2), the dominant PTEs are significantly different (Figure 5). Several pieces of research have also suggested that mining activities were the dominant anthropogenic Pb source in reservoir sediments [63,64]. It is noteworthy that mining activity-related Pb sources account for 66% of the significant outliers (SI11) in Figure 6.…”

Section: Pb Isotope Ratios and Source Apportionmentmentioning

confidence: 99%

Potentially Toxic Element Contaminations and Lead Isotopic Fingerprinting in Soils and Sediments from a Historical Gold Mining Site

Tang

Zhang

et al. 2021

IJERPH

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Lead (Pb) isotopes have been widely used to identify and quantify Pb contamination in the environment. Here, the Pb isotopes, as well as the current contamination levels of Cu, Pb, Zn, Cr, Ni, Cd, As, and Hg, were investigated in soil and sediment from the historical gold mining area upstream of Miyun Reservoir, Beijing, China. The sediment had higher 206Pb/207Pb ratios (1.137 ± 0.0111) than unpolluted soil did (1.167 ± 0.0029), while the soil samples inside the mining area were much more variable (1.121 ± 0.0175). The mean concentrations (soil/sediment in mg·kg−1) of Pb (2470/42.5), Zn (181/113), Cu (199/36.7), Cr (117/68.8), Ni (40.4/28.9), Cd (0.791/0.336), As (8.52/5.10), and Hg (0.168/0.000343) characterized the soil/sediment of the studied area with mean Igeo values of the potentially toxic element (PTE) ranging from −4.71 to 9.59 for soil and from −3.39 to 2.43 for sediment. Meanwhile, principal component analysis (PCA) and hierarchical cluster analysis (HCA) coupled with Pearson’s correlation coefficient among PTEs indicated that the major source of the Cu, Zn, Pb, and Cd contamination was likely the mining activities. Evidence from Pb isotopic fingerprinting and a binary mixing model further confirmed that Pb contamination in soil and sediment came from mixed sources that are dominated by mining activity. These results highlight the persistence of PTE contamination in the historical mining site and the usefulness of Pb isotopes combined with multivariate statistical analysis to quantify contamination from mining activities.

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“…They are mainly composed of gray, off-white, and gray-brown Pb-Zn negrained tailings (Zhang et al 2018). During the natural accumulation of tailings under the in uence of rainfall, the tailings sand undergoes epigenetic geochemical reactions with carbon dioxide and oxygen in the air in the water-rock system, which activates the heavy metals in the tailings sand (Candeias et al 2015;Nassiri et al 2021). The Cd content in the Niujiaotang Pb-Zn ore in Duyun, Guizhou is unusually high, generally ranging from 2,284 to 9,850 µg/g, with a maximum of 13,400 µg/g, and its reserves have reached the scale of large deposits (medium-large Zn and Cd reserves greater than 5,000 t; Jin et al (2018).…”

Section: Introductionmentioning

confidence: 99%

Characteristics and risk assessment of heavy metal pollution of farmlands and crops near Pb–Zn mine tailing ponds: a case study in Niujiaotang, China

Han

Tian

et al. 2022

Preprint

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To accurately evaluate the pollution and risk of heavy metals in crops and farmlands near mines, we determined the contents of Cr, Ni, Cu, As, Cd, Pb, and Zn in 10 farmland soil sampling sites and six crops (pak choi, rice, spring onion, radish, Chinese cabbage, Chrysanthemum coronarium) in an area near the Niujiaotang Pb–Zn mine in Duyun City, China. Four evaluation methods were compared, including the potential ecological hazard index, Nemeiro comprehensive pollution assessment, risk assessment code, and the ratio of secondary phase to primary phase methods. The average concentration of As, Cd, Pb, and Zn exceeded the soil environmental background levels in Niujiaotang and Guizhou Province. Cd exceeded the standard substantially, and Zn pollution accumulation was the most evident. Heavy metal contamination of crops was in the order pak choi > Chinese cabbage > spring onion > paddy > radish > Chrysanthemum coronarium, whereas heavy metal concentration in soils were in the order Zn > As > Cr > Cd > Ni > Pb. The levels of all heavy metals except Cu exceeded Chinese food hygiene standards. Carcinogenic and non-carcinogenic chemicals in crops present significant risks to adults and children. Risk evaluation considering the morphological contents of heavy metals rather than their total concentration was more accurate for environmental quality assessment of agricultural soils.

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Contamination, sources and environmental risk assessment of heavy metals in water, sediment and soil around an abandoned Pb mine site in North East Morocco

Cited by 27 publications

References 61 publications

Environmental Pollution From Heavy Metals in Soils Surrounding the Abandoned Mine of Tansrift (Central High-Atlas, Morocco)

Environmental Pollution From Heavy Metals in Soils Surrounding the Abandoned Mine of Tansrift (Central High-Atlas, Morocco)

Potentially Toxic Element Contaminations and Lead Isotopic Fingerprinting in Soils and Sediments from a Historical Gold Mining Site

Characteristics and risk assessment of heavy metal pollution of farmlands and crops near Pb–Zn mine tailing ponds: a case study in Niujiaotang, China

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