Analysis of Heavy Metal Contaminated Soils

Wong, Coby Sze-chung; Li, Xiangzhong

doi:10.1061/(asce)1090-025x(2003)7:1(12)

Cited by 13 publications

(4 citation statements)

References 38 publications

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“…For the analysis of the soil Pb contamination, the soil samples were weighed and dried in the hot air oven (Wong and Li, 2003). Particles larger than 2 mm in size including stones were sieved and removed.…”

Section: Preparation Of the Soil Samples For Pb Contamination Analysismentioning

confidence: 99%

Bioremediation Potential of Soil Lead (Pb) Tolerant Fungi isolated from Owino Uhuru, a Suburb of Mombasa County, Kenya

Panyako,

Wacira,

Omolo

et al. 2024

Preprint

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A lead (Pb) smelter plant located in Owino Uhuru, a suburb of Mombasa County, caused lead poisoning and lifelong health effects. The Government of Kenya closed down the plant after reports of contamination. This study collected 24 soil samples from Owino Uhuru and analyzed them for lead levels using Microplasma Atomic Emission Spectrometry. The study also isolated and identified seven strains of fungi from the lead-contaminated soil and screened them for their ability to absorb lead. The genomic DNA of the fungal isolates was identified using ITS sequences of the rDNA. Blastn analysis indicated that the ITS gene sequences of the isolates had similarities of > 100% with known sequences in the nucleotide sequence database. These fungi were identified as Aspergillus welwitschiae, Aspergillus oryzae, Aspergillus piperis, Aspergillus austwickii, Aspergillus aflatoxiformans and Aspergillus tubingensis. The fungal isolates were tested for their ability to absorb lead at concentrations of 1.0 ppm, 0.8 ppm, 0.6 ppm, 0.4 ppm, and 0.2 ppm. The soil sample closest to the battery recycling plant contained more lead than those collected further away. Soil sample AU06, taken from the area bordering the wall of the lead smelter plant, had the highest lead concentration compared to all the samples. Aspergillus welwitschiae (GRY1) showed a higher potential for lead biosorption of 0.35 ± 0.1 ppm at 0.6 ppm lead concentration compared to other Aspergillus species. The study suggests using these fungal isolates for the removal and bio-treatment of lead-contaminated and polluted environments.

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Section: Preparation Of the Soil Samples For Pb Contamination Analysismentioning

confidence: 99%

Bioremediation Potential of Soil Lead (Pb) Tolerant Fungi isolated from Owino Uhuru, a Suburb of Mombasa County, Kenya

Panyako,

Wacira,

Omolo

et al. 2024

Preprint

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“…The samples were continually stirred for about 15 minutes using a magnetic stirrer on a magnetic sitter plate. The samples were allowed to settle, and their pH was determined by a handheld Hanna pH meter calibrated with pH buffer solutions 4, 7, and 10 [20,21].…”

Section: Soil Sample Preparation and Determination Of Phmentioning

confidence: 99%

Heavy Metal Pollution Resulting from Informal E-Waste Recycling in the Greater Accra Region of Ghana

Teye¹,

Tetteh²

2023

Heavy Metals - Recent Advances

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This study investigated concentrations and spatial distributions of four heavy metals: Cadmium (Cd), Chromium (Cr), Copper (Cu), and Lead (Pb) in the soil and drainage systems resulting from informal e-waste recycling at Ashaiman, a town in the Greater Accra Region of Ghana. Twenty-four soil samples were randomly taken from two open burning sites, and three water samples from a drainage that flows through the scrapyard were digested using standard wet digestion methods. An atomic absorption spectrophotometer (AAS) was used to analyze three replicates per sampling location for the heavy metals. The results revealed that the soil and drainage samples were polluted, with the metallic levels exceeding the World Health Organization (WHO), the Food and Agricultural Organization (FAO) of the United Nations, and the Environmental Protection Agency (EPA) of Ghana limits. Geoaccumulation index (Igeo), pollution load index (PLI), and contamination factor (CF) further confirmed the contamination of the scrapyard by the heavy metals. Spatial distribution maps showed elevated levels of the heavy metals at portions designated for open burning and disposal of e-waste materials. The research corroborates studies on pollution of the environment by informal e-waste activities and underscores the urgent need for policy implementation and law enforcement to halt further pollution.

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“…The environmental assessment of contaminated soil prior to civil construction projects is based on soil sampling, methods of implementation, analysis and interpretation (Wong and Li 2003). Following such a research scheme, our study combined several tests for evaluating chemical and heavy-metal concentrations and leaching in soil stabilized by a different ratio of binders (120/150 kg per m 3 ) added to the dredged material.…”

Section: Research Objectivesmentioning

confidence: 99%

Gospodarka Surowcami Mineralnymi - Mineral Resources Management

Lindh

Lemenkova

2022

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Analysis of Heavy Metal Contaminated Soils

Cited by 13 publications

References 38 publications

Bioremediation Potential of Soil Lead (Pb) Tolerant Fungi isolated from Owino Uhuru, a Suburb of Mombasa County, Kenya

Bioremediation Potential of Soil Lead (Pb) Tolerant Fungi isolated from Owino Uhuru, a Suburb of Mombasa County, Kenya

Heavy Metal Pollution Resulting from Informal E-Waste Recycling in the Greater Accra Region of Ghana

Gospodarka Surowcami Mineralnymi - Mineral Resources Management

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