contaminated soil Articles
-
Extraction of lead and cadmium from soils by Cysteine and Glutathione
Received for publication December 17, 2008. Metal-thiol complexes can enhance metal uptake by plant roots and microorganisms, therefore it is important to determine whether thiols effectively solubilize these metals from the soil matrix. Extractions were conducted by combining 1 g contaminated soil and 10 mL of 10 mmol L–1 thiol solution and shaking for 1 h. Both cysteine and glutathione ...
-
Common Treatment Train for Explosives
In general, no single technology can remediate an entire site. Several treatment technologies are usually combined at a single site to form what is known as a treatment train. A system diagram of a common treatment train for explosives is illustrated below. Explosive contaminated soil is first excavated from the site and transported to a windrow composting site. During windrow composting, ...
-
Impacts of chemical amendment and plant growth on lead speciation and enzyme activities in a shooting range soil: An X-ray absorption fine structure investigation
In situ chemical immobilization is a practical remediation technology for metal-contaminated soils because of its capability to reduce cost and environmental impacts. We assessed the immobilization effects of poultry waste amendment and plant growth (Panicum maximum Jacq.) on Pb speciation and enzyme activities in shooting range soils. Soil contaminated with Pb was obtained from the top 20 cm of ...
-
Land Farming Application Reduces TPH by 90% to 99%
Petrox microbes were added to excavated petroleum-contaminated soil to accelerate the degradation of DRO and ERO total petroleum hydrocarbons. Petrox was added by spraying the surface of the soil with a hydrated Petrox solution. The microbes were mixed into the soil using a tractor-mounted disc tiller. ...
-
The role of natural purified humic acids in modifying Mercury accessibility in water and soil
Received for publication April 17, 2008. Contamination of soils with mercury can be a serious problem. It can be mobilized or stabilized by humic substances (HS) containing binding sites with reduced sulfur that can have different binding capacities for CH3Hg+ and for Hg2+. In this work we investigated the influence of different humic acids (HAs, extracted from lignite, compost, and forest soil) ...
-
Chelant-assisted accumulation of Cd, Cu and Zn in rapeseed (Brassica napus L.) biomass as a renewable energy feedstock.
This article discusses the environmental concerns regarding soil contamination by heavy metals and the possibility of growing a high biomass-yielding crop (i.e., rapeseed) as a tool of phytoremediation. The aim of our research was to investigate the growth parameters and the capacity of rapeseed to accumulate Cd, Cu, and Zn from the contaminated soil and to investigate the effects of the chelants ...
By Biovala
-
Biodegradation of crude oil in soil using chicken manure
To investigate enhancement of crude oil biodegradation by adding microbes to the contaminated soil, chicken manure was put into oil-polluted soil (at 10% v/w pollution level). In the soil amended with chicken manure, 72.5% of the crude oil was degraded, whereas only 52.7% of same oil was degraded in the unamended soil. The remedied soil contains 1.4 × 106 CFU g−1 crude oil-degrading bacteria, and ...
-
Influence of nitrogen fertilizer on Cd and Zn accumulation in rapeseed (Brassica napus L.) biomass
Diffuse soil contamination with heavy metals and Cd in particular is a matter of serious concern. Application of conventional remediation methods usually is not feasible due to the large territories and relatively low heavy metal content. Thus, phytoremediation is seen as an alternative. Rapeseed was grown on Cd and Zn contaminated as well as clean soil under the greenhouse conditions. Solid and ...
By Biovala
-
Can chemical treatments to displace radioisotopes influence soil fertility? A laboratory trial
Soils contaminated with radionuclide pose a long–term radiation hazard to human health through exposure via the food chain and other pathways. Remediation of contaminated soils has become increasingly important. The feasibility to move radionuclides from superficial soil layers to a deeper level using an acid leaching solution was already illustrated previously. As this chemical treatment may ...
-
Composting
Introduction Composting is a controlled biological process by which organic contaminants (e.g., PAHs) are converted by microorganisms (under aerobic and anaerobic conditions) to innocuous, stabilized byproducts. Typically, thermophilic conditions (54 to 65 °C) must be maintained to properly compost soil contaminated with hazardous organic contaminants. The increased temperatures result from heat ...
-
A Possible EU Wide Charge on Cadmium in Phosphate Fertilisers: Economic and Environmental Implications
Abstract This report examines the economic and environmental effect of introducing an EU wide charge on the cadmium content of phosphate fertilisers. The objective of such a charge would be to reduce cadmium contamination of soils in a cost effective way. The main conclusions are that the economic impact of such a charge on EU agriculture and industry will be small. However, it may lead to a ...
-
Biochar impact on physiological and biochemical attributes of Spinach (Spinacia oleracea L.) in nickel contaminated soil
Disastrous effect of nickel on spinach was discussed by number of authors but the effect of amendments like biochar with nickel on Spinacea oleraceaL. is not still discussed by any author of the world because biochar was used as soil amendments which play a vital role in reducing mobilization and uptake of nickel by spinach plants. As nickel contaminated plants are very harmful for the ...
-
A farm irrigation pond contaminated with diesel case study
Due to a broken supply line a Yorkshire farm had a diesel oil spillage of approximately 1300 litres which contaminated the adjacent soil and the farm irrigation lagoon. Scientific Environmental Technologies (SET) were commissioned by the loss adjusters to bioremediate the contaminated site. SET chose Amnite P100 hydrocarbon degrading bacteria as the biological agent to break down the diesel ...
-
Screening of a new cadmium hyperaccumulator Galinsoga parviflora from winter farmland weeds using the artificially‐high soil cadmium concentration method
A new method, the artificially‐high soil cadmium (Cd) concentration method, was used to screen for Cd hyperaccumulators among winter farmland weeds. Galinsoga parviflora was the most promising remedial plant among five Cd accumulators or hyperaccumulators. In Cd concentration gradient experiments, as soil Cd concentration increased, root and shoot biomass decreased and their Cd contents ...
-
Assessment of heavy metal contamination and bioaccumulation in soybean plants from mining and smelting areas of southern Hunan province, China
Soybean is one of most important dicotyledonous food crops and widely planted in Hunan province, China. However, mining activity causes soil contamination in which soybean grows. To assess the impact of mining‐induced soil contamination on soybean plants, a geoaccumulation index (Igeo) was used to evaluate 20 soil samples from the mining areas of southern Hunan province, China. The results ...
-
Copper pollution in some vineyard soils of the Piedmont region (Italy): accumulation and mobility
Cu-based fungicides have been heavily used against the mildew caused by Plasmopara viticola, widespread in the Piedmont region (NW Italy). Vineyards with high Cu contents in the top soil, have been studied. The past Cu input was compared with the amounts of Cu actually measured. Downward migration rate of Cu was investigated by applying a mathematical model. A chemical, physical and mineralogical ...
-
The transport of three emerging pollutants through an agricultural soil irrigated with untreated wastewater
The aim of this work was to determine the mobility of naproxen, carbamazepine, and triclosan through a wastewater-irrigated agricultural soil. Transport experiments were carried out using undisturbed soil columns taken at 10 and 40 cm depths. The mobilization of the pollutants was evaluated using two hydrological regimes transient flow for superficial columns and steady-state conditions for the ...
-
Olive oil Mill Wastewater properties change during infiltration through clay soils
Olive oil Mill Wastewaters (OMW), are stored in clay basins in the region of Sfax (Tunisia). Field permeability measurements showed that the clay is not completely impermeable and its structure can be modified by the infiltration of OMW. Analysis of chemical composition of soil revealed the presence of phenolic compounds resulting from the percolation of OMW. An infiltration filled with clay and ...
-
Modelling Pesticide and Nutrient Transport in the Cameron Highlands, Malaysia Agro-Ecosystems
Cameron Highlands has a long history of intensive horticulture especially vegetable and flower cultivation. This industry uses large amounts of nutrients and pesticides. Several simulation models were used to assess the movement of pesticides and nutrients in relation to agronomic practices in farm plots cultivated with cabbage and chrysanthemum. It was shown that most of the pesticides are ...
-
Modelling Pesticide and Nutrient Transport in the Cameron Highlands, Malaysia Agro-Ecosystems
Cameron Highlands has a long history of intensive horticulture especially vegetable and flower cultivation. This industry uses large amounts of nutrients and pesticides. Several simulation models were used to assess the movement of pesticides and nutrients in relation to agronomic practices in farm plots cultivated with cabbage and chrysanthemum. It was shown that most of the pesticides are ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you