Effect of Water-Thoroughly-Rinsing in the Artificially Metal-Contaminated Soil Preparation on Final Soil Metal Concentrations

An ambitious citizen science effort in the city of Indianapolis (IN, USA) led to the collection and analysis of a large number of samples at the property scale, facilitating the analysis of differences in soil metal concentrations as a function of property location (i.e., dripline, yard, and street) and location within the city. This effort indicated that dripline soils had substantially higher values of lead and zinc than other soil locations on a given property, and this pattern was heightened in properties nearer the urban core. Soil lead values typically exceeded the levels deemed safe for children’s play areas in the United States (<400 ppm), and almost always exceeded safe gardening guidelines (<200 ppm). As a whole, this study identified locations within properties and cities that exhibited the highest exposure risk to children, and also exhibited the power of citizen science to produce data at a spatial scale (i.e., within a property boundary), which is usually impossible to feasibly collect in a typical research study.

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EDTA assisted phytorremediation of a Pb contamined soil: metal leaching and uptake by jack beans

Scientia Agricola ◽

10.1590/s0103-90162009000400012 ◽

2009 ◽

Vol 66 (4) ◽

pp. 506-514 ◽

Cited By ~ 17

Author(s):

Mariana Bassetto Gabos ◽

Cleide Aparecida de Abreu ◽

Aline Reneé Coscione

Keyword(s):

Contaminated Soil ◽

Dry Matter ◽

Research Work ◽

Vertical Movement ◽

Metal Leaching ◽

Soil Contaminants ◽

Soil Material ◽

Total Plant ◽

Low Solubility ◽

Soil Metal

Lead (Pb) is one of the main soil contaminants. It is also of difficult phytoremediation due to its low solubility and high retention on soil particles. EDTA application to soil is a strategy to increase heavy metal phytoextraction, but such chelants usually cause phytotoxicity and metal leaching side effects. Therefore, these research work objectives were to evaluate the effects of single (0.5 g kg-1) and split (0.25 + 0.25 g kg-1) EDTA application on Pb uptake by jack beans (Canavalia ensiformis L.) as well as on Pb vertical movement in a Pb contaminated soil material. Two sets of experiments were carried out under greenhouse conditions: in the first one, plants were grown in 3L-pots filled with a Pb-contaminated soil to evaluate Pb uptake by plants; for the second experiment, PVC-columns (42 cm height) were used to evaluate soil Pb leaching: the upper half-column (20 cm) was filled up with Pb-contaminated soil (1800 mg kg-1) whereas the lower half-column (20 cm) was filled with clean soil. Ten 60 mm-rainfalls with a duration of five hours were simulated by dropping distilled water on the top of columns, and leachates were collected for chemical analysis. Plants did not show any visual Pb toxicity symptoms or reduction in dry matter yield. Nevertheless, Pb uptake by jack beans regarded as total plant Pb accumulation was higher in EDTA-treated plants. Vertical Pb movement was observed mostly for the single EDTA application. EDTA addition to the soil favor Pb-phytoextraction by jack beans and the split EDTA application decrease the metal leaching, indicating less risk of environmental contamination.

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Clay Minerals as a Feasible Additive to Stabilize Cadmium in Contaminated Soils

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.1906 ◽

2007 ◽

Vol 336-338 ◽

pp. 1906-1909 ◽

Cited By ~ 2

Author(s):

Zhen Qi Hu ◽

Xiu Hong Yang ◽

Ying Chun Zhang

Keyword(s):

Clay Minerals ◽

Contaminated Soil ◽

Contaminated Soils ◽

Langmuir Model ◽

Adsorption Behavior ◽

Metal Concentrations ◽

Pot Experiments ◽

Maximum Sorption ◽

Cadmium Contaminated Soil

The adsorption behavior of clay minerals in cadmium contaminated soils has been studied in order to remedy soils contaminated with this metal in this work. The results show that Langmuir model best describes the adsorption of Cd2+, and the maximum sorption values of 8.45 mg/g for bentonite, 5.69mg/g for sepiolite and 10.57mg/g for attapulgite are obtained at pH 5-6. In addition, the effect of clay minerals amendment on a highly cadmium contaminated soil has been studied by means of pot experiments. The results indicate that the metal concentrations in shoot and root of plant decreased with addition of clay minerals to soil (1%), and the highest decrease value of metal concentrations is obtained in the soils added by attapulgite amendment.

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Plant metal concentrations in Theobroma cacao as affected by soil metal availability in different soil types

Chemosphere ◽

10.1016/j.chemosphere.2020.127749 ◽

2021 ◽

Vol 262 ◽

pp. 127749

Author(s):

Caleb Lewis ◽

Adrian M. Lennon ◽

Gaius Eudoxie ◽

Paramasivam Sivapatham ◽

Pathmanathan Umaharan

Keyword(s):

Theobroma Cacao ◽

Soil Types ◽

Metal Availability ◽

Metal Concentrations ◽

Soil Metal

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PLANT GROWTH AND SOIL METAL CONCENTRATIONS A SPATIAL EFFECTS MODEL

Journal American Society of Mining and Reclamation ◽

10.21000/jasmr02010194 ◽

2002 ◽

Vol 2002 (1) ◽

pp. 194-211

Author(s):

D.R. Neuman ◽

S.R. Jennings ◽

M.K. Reeves

Keyword(s):

Plant Growth ◽

Spatial Effects ◽

Metal Concentrations ◽

Soil Metal

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Mapping the Urban Lead Exposome: A Detailed Analysis of Soil Metal Concentrations at the Household Scale Using Citizen Science

10.20944/preprints201806.0271.v1 ◽

2018 ◽

Author(s):

Gabriel Filippelli ◽

Jessica Adamic ◽

Deborah Nichols ◽

John Shukle ◽

Emeline Frix

Keyword(s):

Citizen Science ◽

Metal Concentrations ◽

Soil Lead ◽

Urban Core ◽

Lead And Zinc ◽

Property Scale ◽

The Us ◽

Core Soil ◽

The City ◽

Soil Metal

An ambitious citizen-science effort in the city of Indianapolis (Indiana, USA) led to the collection and analysis of a large number of samples at the property scale, facilitating the analysis of differences in soil metal concentrations as a function of property location (i.e., dripline, yard, and street) and location within the city. This effort indicated that dripline soils had substantially higher values of lead and zinc than other soil locations on a given property, and this pattern was heightened in properties nearer the urban core. Soil lead values typically exceeded the levels deemed safe for children’s play areas in the US (<400 ppm), and almost always exceeded safe gardening guidelines (<200 ppm). As a whole, this study identified locations within properties, and cities, that exhibited the highest exposure risk to children, and also exhibited the power of citizen science to produce data at a spatial scale (i.e., within a property boundary) that is usually impossible to feasibly collect in a typical research study.

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Measuring Soil Metal Bioavailability in Roadside Soils of Different Ages

Environments ◽

10.3390/environments7100091 ◽

2020 ◽

Vol 7 (10) ◽

pp. 91

Author(s):

Shamali De Silva ◽

Trang Huynh ◽

Andrew S. Ball ◽

Demidu V. Indrapala ◽

Suzie M. Reichman

Keyword(s):

Linear Models ◽

Intrinsic Rate ◽

Strong Relationship ◽

Control Site ◽

Roadside Soil ◽

Metal Bioavailability ◽

Roadside Soils ◽

Metal Concentrations ◽

Total Metal ◽

Soil Metal

Finding a reliable method to predict soil metal bioavailability in aged soil continues to be one of the most important problems in contaminated soil chemistry. To investigate the bioavailability of metals aged in soils, we used roadside soils that had accumulated metals from vehicle emissions over a range of years. We collected topsoil (0–10 cm) samples representing new-, medium- and old-aged roadside soils and control site soil. These soils were studied to compare the ability of the diffusive gradients in thin films technique (DGT), soil water extraction, CaCl2 extraction, total metal concentrations and optimised linear models to predict metal bioavailability in wheat plants. The response time for the release of metals and the effect on metal bioavailability in field aged soils was also studied. The DGT, and extractable metals such as CaCl2 extractable and soil solution metals in soil, were not well correlated with metal concentrations in wheat shoots. In comparison, the strongest relationships with concentrations in wheat shoots were found for Ni and Zn total metal concentrations in soil (e.g., Ni r = 0.750, p = 0.005 and Zn r = 0.833, p = 0.001); the correlations were still low, suggesting that total metal concentrations were also not a robust measure of bioavailability. Optimised linear models incorporating soil physiochemical properties and metal extracts together with road age as measure of exposure time, demonstrated a very strong relationship for Mn R2 = 0.936; Ni R2 = 0.936 and Zn R2 = 0.931. While all the models developed were dependent on total soil metal concentrations, models developed for Mn and Zn clearly demonstrated the effect of road age on metal bioavailability. Therefore, the optimised linear models developed have the potential for robustly predicting bioavailable metal concentrations in field soils where the metals have aged in situ. The intrinsic rate of release of metals increased for Mn (R2 = 0.617, p = 0.002) and decreased for Cd (R2 = 0.456, p = 0.096), Cu (R2 = 0.560, p = 0.083) and Zn (R2 =0.578, p = 0.072). Nickel did not show any relationship between dissociation time (Tc) and road age. Roadside soil pH was likely to be the key parameter controlling metal aging in roadside soil.

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Multivariate data analysis for bioremediation of contaminated soil through Interactions between heavy metals, microbes and plants

مجلة جامعة فلسطين التقنية للأبحاث ◽

10.53671/ptukrj.v1i1.9 ◽

2013 ◽

Vol 1 (1) ◽

pp. 21-28

Author(s):

Basel Natsheh ◽

Nawaf Abu-Khalaf ◽

Tahseen Sayara ◽

Saed Khayat ◽

Mazen Salman

Keyword(s):

Contaminated Soil ◽

Contaminated Soils ◽

Sewage Effluent ◽

In Situ Remediation ◽

Promising Technique ◽

Plant Parts ◽

Complex Interactions ◽

Fungal Inoculation ◽

Soil Metal

Plant-assisted bioremediation (phytoremediation) is a promising technique for in-situ remediation of contaminated soils. Enhancement of phytoremediation processes requires a sound understanding of the complex interactions in the rhizosphere. This work presents a Pot experiment was conducted under green house conditions to test the effect of fungal inoculation on remediating heavy metal (HM) contaminated soil treated with sewage effluent for several years. Canola crop was used as accumulator plants. Results demonstrated that the dry matter yield of tested crops were significantly higher in soil irrigated for 50 years with sewage effluent than that in 20 years sewage effluent irrigated soil. Metal uptake and accumulation in different plant parts (shoot and root) was enhanced after inoculation with Aspergillus parasiticus (F1) and Fusarium oxysporum (F2). The reate of HM accumulation as higher in in soil treated irrigated sewage effluent for 50 years than that in 20 years sewage irrigated soil.

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