A laboratory assay of in situ stabilization of toxic metals in contaminated boreal forest soil using organic and inorganic amendments

Metal-contaminated soils present a great threat to natural ecosystems and human health. Remediation studies focusing on metal-polluted soils with high organic matter (OM > 20%) are limited. This study evaluated the effectiveness of biochar, compost, diammonium phosphate (DAP), and iron oxides (Fe-O), in immobilizing metals from an OM-rich boreal forest soil contaminated with arsenic (As), cadmium (Cd), copper (Cu), lead (Pb), and zinc (Zn). A laboratory incubation study was conducted with soil amended with biochar (5% w w−1), compost (5% w w−1), DAP (0.2% w w−1), or Fe-O (0.2% w w−1), and a control (without amendment) for 6 months at field capacity moisture content. Metal concentrations were determined in pore water collected at 0, 2, 4, and 6 months after incubation. Soil was extracted sequentially for metals after the incubation period. Metal concentrations in pore water were significantly reduced by different amendments as follows: As by biochar and Fe-O, Cd by biochar, compost, and DAP, Cu by biochar, Pb by compost and DAP, and Zn by biochar and compost. Sequential extractions revealed biochar and (or) compost transferred Cd, Cu, Pb, and Zn from the labile pool to the non-labile pool confirming their effectiveness as amendments for remediation of metal-contaminated OM-rich boreal forest soil.

Download Full-text

Warming-enhanced preferential microbial mineralization of humified boreal forest soil organic matter: Interpretation of soil profiles along a climate transect using laboratory incubations

Journal of Geophysical Research Atmospheres ◽

10.1029/2011jg001769 ◽

2012 ◽

Vol 117 (G2) ◽

pp. n/a-n/a ◽

Cited By ~ 12

Author(s):

Jianwei Li ◽

Susan Ziegler ◽

Chad S. Lane ◽

Sharon A. Billings

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Boreal Forest ◽

Forest Soil ◽

Soil Profiles ◽

Forest Soil Organic Matter ◽

Microbial Mineralization

Download Full-text

Effect of Cadmium, Copper and Lead on the Growth of Rice in the Coal Mining Region of Quang Ninh, Cam-Pha (Vietnam)

Sustainability ◽

10.3390/su10061758 ◽

2018 ◽

Vol 10 (6) ◽

pp. 1758 ◽

Cited By ~ 9

Author(s):

J. Marquez ◽

Olivier Pourret ◽

Michel-Pierre Faucon ◽

Sebastian Weber ◽

Thi Hoàng ◽

...

Keyword(s):

Trace Elements ◽

Trace Metal ◽

Contaminated Soils ◽

Mine Waste ◽

Local Population ◽

Rice Paddy ◽

Coal Extraction ◽

Open Pit ◽

Metal Concentrations ◽

Rice Paddy Soils

The goal of this study was to quantify the mobility and partitioning of trace elements originating from mine waste rocks derived from open pit coal extraction activities. The results showed that native rice plants were adapted to growing in metal contaminated soils, posing a severe health risk to local population. Sequential extraction procedures and bulk soil chemical analyses both suggest enrichment of Cd, Pb and Cu in rice paddy soils. Lead was shown to be evenly partitioned among all mineral and organic phases. Copper was associated with carbonates and organic matter. Smaller fractions of Pb and Cu were also bound to Fe and Mn oxides. Only 25% of Cd, 9% of Pb and 48% of Cu were associated with the exchangeable fraction, considered mobile and thus bioavailable for plant uptake. Effects of Cd, Cu and Pb on local Cam Pha Nep cai Hoa vang, and control Asia Italian rice, showed marked differences in growth. The local Vietnamese variety grew close to control values, even upon exposure to higher trace metal concentrations. Whereas the development of the control rice species was significantly affected by increasing trace metal concentrations. This result suggests toxic trace elements accumulation in the edible parts of crops.

Download Full-text

Remediation of Metal- and Radionuclides-Contaminated Soils by In Situ Stabilization Techniques

Environmental Restoration of Metals-Contaminated Soils ◽

10.1201/9781420026269.ch2 ◽

2000 ◽

pp. 21-60 ◽

Cited By ~ 5

Author(s):

M Mench ◽

J Seaman ◽

A Knox ◽

J Vangronsveld

Keyword(s):

Contaminated Soils ◽

In Situ Stabilization

Download Full-text

Numerical Evaluation and Management Suggestions for Heavy Metal Pollution Risks in a Sludge Landfill: A Case Study from Fuyong Landfill, Shenzhen, China

Advances in Civil Engineering ◽

10.1155/2020/8854313 ◽

2020 ◽

Vol 2020 ◽

pp. 1-8

Author(s):

Muyun Sun ◽

Kaiyuan He ◽

Shi Shu

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Pore Water ◽

Metal Pollution ◽

Heavy Metal Pollution ◽

Rainfall Infiltration ◽

Metal Concentrations ◽

Metal Pollutants ◽

Heavy Metal Concentrations ◽

Heavy Metal Pollutants

Despite the extensive attention paid to the transport of heavy metals in sludge landfills, the processes of transporting these pollutants from a landfill to the underground environment are quite complicated and subject to significant uncertainty. In this study, the transport of typical heavy metal pollutants in a sludge landfill through saturated and unsaturated soil zones during rainfall was investigated via numerical modeling. The objectives of the study are to evaluate the heavy metal pollution risk from a sludge landfill under rainfall infiltration conditions and to propose several management suggestions. The results indicate that, during rainfall, heavy metal concentrations at the top of the unsaturated sludge layer decrease rapidly, but they decrease more gradually at the bottom of the layer. The maximum concentration appears in vertical distribution and decreases gradually through the saturated zone. Nickel is the first heavy metal pollutant to break through the low-permeability natural silt barrier. The transport parameters not only influence the simulated time for heavy metal pollutants to break through the silt layer and cause underground environmental pollution but also affect the extent to which the heavy metal pollutants in pore water exceed the guidelines. On the basis of these results, for dredged sludge with heavy metal concentrations significantly exceeding the standard, the concentration of heavy metals in pore water should be reduced before the sludge is landfilled, and a covering layer should be established on the sludge surface to control rainfall infiltration.

Download Full-text

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.

Download Full-text

Methanotrophic bacteria in boreal forest soil after fire

FEMS Microbiology Ecology ◽

10.1016/j.femsec.2004.06.013 ◽

2004 ◽

Vol 50 (3) ◽

pp. 195-202 ◽

Cited By ~ 47

Author(s):

Krista Jaatinen ◽

Claudia Knief ◽

Peter F. Dunfield ◽

Kim YrjÃ¥lÃ¥ ◽

Hannu Fritze

Keyword(s):

Boreal Forest ◽

Forest Soil ◽

Methanotrophic Bacteria

Download Full-text

Extraction and Characterization of Pore Water in Contaminated Soils

Environmental Geochemistry: Site Characterization, Data Analysis and Case Histories ◽

10.1016/b978-0-444-63763-5.00011-2 ◽

2018 ◽

pp. 195-235 ◽

Cited By ~ 1

Author(s):

Marcello Di Bonito ◽

Neil Breward ◽

Neil Crout ◽

Barry Smith ◽

Scott D. Young ◽

...

Keyword(s):

Pore Water ◽

Contaminated Soils

Download Full-text

Heavy Metal Soil Contamination Detection Using Combined Geochemistry and Field Spectroradiometry in the United Kingdom

Sensors ◽

10.3390/s19040762 ◽

2019 ◽

Vol 19 (4) ◽

pp. 762 ◽

Cited By ~ 18

Author(s):

Salim Lamine ◽

George Petropoulos ◽

Paul Brewer ◽

Nour-El-Islam Bachari ◽

Prashant Srivastava ◽

...

Keyword(s):

Heavy Metal ◽

United Kingdom ◽

Soil Contamination ◽

Contaminated Soils ◽

Prediction Models ◽

Geochemical Data ◽

Spectral Features ◽

Metal Concentrations ◽

Heavy Metal Concentrations ◽

Spectral Libraries

Technological advances in hyperspectral remote sensing have been widely applied in heavy metal soil contamination studies, as they are able to provide assessments in a rapid and cost-effective way. The present work investigates the potential role of combining field and laboratory spectroradiometry with geochemical data of lead (Pb), zinc (Zn), copper (Cu) and cadmium (Cd) in quantifying and modelling heavy metal soil contamination (HMSC) for a floodplain site located in Wales, United Kingdom. The study objectives were to: (i) collect field- and lab-based spectra from contaminated soils by using ASD FieldSpec® 3, where the spectrum varies between 350 and 2500 nm; (ii) build field- and lab-based spectral libraries; (iii) conduct geochemical analyses of Pb, Zn, Cu and Cd using atomic absorption spectrometer; (iv) identify the specific spectral regions associated to the modelling of HMSC; and (v) develop and validate heavy metal prediction models (HMPM) for the aforementioned contaminants, by considering their spectral features and concentrations in the soil. Herein, the field- and lab-based spectral features derived from 85 soil samples were used successfully to develop two spectral libraries, which along with the concentrations of Pb, Zn, Cu and Cd were combined to build eight HMPMs using stepwise multiple linear regression. The results showed, for the first time, the feasibility to predict HMSC in a highly contaminated floodplain site by combining soil geochemistry analyses and field spectroradiometry. The generated models help for mapping heavy metal concentrations over a huge area by using space-borne hyperspectral sensors. The results further demonstrated the feasibility of combining geochemistry analyses with filed spectroradiometric data to generate models that can predict heavy metal concentrations.

Download Full-text

Effects of Non-Industrial Wood Ash (NIWA) Applications on Soil Chemistry and Sugar Maple (Acer saccharum, Marsh.) Seedling Growth in an Acidic Sugar Bush in Central Ontario

Forests ◽

10.3390/f11060693 ◽

2020 ◽

Vol 11 (6) ◽

pp. 693

Author(s):

Holly D. Deighton ◽

Shaun A. Watmough

Keyword(s):

Forest Soil ◽

Seedling Growth ◽

Soil Ph ◽

Soil Chemistry ◽

Acer Saccharum ◽

Soil Amendment ◽

Sugar Maple ◽

Base Cation ◽

Yellow Birch ◽

Metal Concentrations

Research Highlights: In central Ontario, large quantities of non-industrial wood ash (NIWA) are generated and could be used as a forest soil amendment to counteract soil acidification and base cation depletion caused by decades of acid deposition. Background and Objectives: The properties and biogeochemical responses of NIWA have not been thoroughly explored, and field experiments must be conducted before NIWA can be regulated as a forest soil amendment in Ontario. Materials and Methods: In this study, soil chemistry and sugar maple (Acer saccharum, Marsh.) seedling growth and chemistry were measured in an acidic sugar bush over twelve months following a NIWA field experiment. Plots (2 m by 2 m) were established with sugar maple, white pine (Pinus strobus L.), and yellow birch (Betula alleghaniensis Britt.) NIWA treatments applied at rates of 6 Mg ha−1 along with untreated control plots. Results: Ash chemistry varied significantly among species and yellow birch ash generally had much higher metal concentrations compared with other species. Following ash application, significant increases in soil pH and calcium and magnesium concentrations were observed, however the level of response varied by treatment. Foliar concentrations of base cations in sugar maple seedlings significantly increased in ash treatments and there was no significant treatment effect on foliar metal concentrations or seedling growth. In roots and shoots, concentrations of several metals (manganese, aluminum, iron, boron, arsenic, cadmium, zinc, copper, lead, chromium, and nickel) increased after ash application, however response was most pronounced in yellow birch ash. Conclusions: These results suggest that application of NIWA can counteract the lasting effects of acid rain by increasing soil pH and base cation concentrations, as well as increasing sugar maple seedling foliar nutrient concentrations, but ashes from species with high metal contents may also increase metal availability to vegetation, at least in the short-term.

Download Full-text