Author: Shea Denese JonesPublisher:
ISBN:
Category :
Languages : en
Pages : 228
Book Description
A Characterization and Assessment of the Bioavailability of Lead and Other Heavy Metals in an Oakland Contaminated Soil
Author: Shea Denese JonesLead in Soil
Author: Bobby G. WixsonPublisher: CRC Press
ISBN: 1351361015
Category : Science
Languages : en
Pages : 212
Book Description
Until the publication of this new book there had been a lack of well-founded guidelines for evaluating concentrations of lead in soil and its relationship to human health. Thus, much confusion has existed among regulatory agencies, industries, public health officials, and the medical community about the evaluation and remedying of lead-contaminated soils. Lead in Soil: Recommended Guidelines represents the combined efforts of a multi-disciplinary international task force from the Society for Environmental Geochemistry and Health (SEGH) whose members are experts in the fields of lead pollution and toxicology. It provides an international consensus concerning environmental lead and blood lead-especially in children. The task force evaluated the evidence and made recommendations for guidelines to appraise lead concentration. It also studied the influence of soil and other sources of lead on blood lead concentrations. A model was prepared that allows the user to select appropriate target levels of blood lead while allowing for a variety of environmental situations or regulatory criteria.
Environmental Contamination by Lead and Other Heavy Metals
Author: Gary L. RolfePublisher:
ISBN:
Category : Heavy metals
Languages : en
Pages : 722
Book Description
Providing Solutions for a Better Tomorrow
Author: Environmental Contamination by Lead and Other Heavy Metals: Introduction and summary, by G. L. Rolfe and K. A. Reinbold. v. 2. Ecosystem analysis, by Gary L. Rolfe, Alan Haney, and Keturah A. Reinbold. v. 3. Distribution and characterization of urban dusts, by R. L. Solomon and D. F. S. Natusch. v. 4. Soil-water-air-plant studies, compiled by D. E. Koeppe. v. 5. Synthesis and modeling, by G. L. Wheeler, G. Provenzano, and R. Resek
Author: Gary L. RolfeBioavailability, Toxicity, and Risk Relationship in Ecosystems
Author: R NaiduPublisher: CRC Press
ISBN: 1482294265
Category : Technology & Engineering
Languages : en
Pages : 360
Book Description
This book describes the bioavailability, toxicity and risk relationships of metal contaminants in ecosystems. It discusses bioavailability within the context of environmental health and ecotoxicological risk assessment and the potential impact that metals may have on soil ecosystem.
Talon-pojan sää- eli ilma-kirja, joka sisällänsä pitä muutamia kaunita opetuxia, kuinga wuoden juoxu, ajat ja muutoxet, yhdestä wuodesta toiseen tunnettaman pitä. Stokkholmisa, pränd. kuning:sesa suomalais. prändisä 1782
Author: Dynamics and Bioavailability of Heavy Metals in the Rootzone
Author: H. Magdi SelimPublisher: CRC Press
ISBN: 1439826234
Category : Science
Languages : en
Pages : 308
Book Description
Concerns regarding heavy metal contamination in terrestrial ecosystems have prompted increasing efforts on limiting their bioavailability in the root zone. The complexity of the hydrologic system gives rise to the need for understanding the fate and transport of trace elements in the soil-water-plant environment. Dynamics and Bioavailability of Hea
Risk and Stability of Phosphate-immobilized Lead in Contaminated Urban Soil and Mining Sites in the Jasper County Superfund Site
Author: Tang, XiPublisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages :
Book Description
In situ application of soluble phosphates and organic matter is considered to be a cost effective remediation technique for immobilizing lead (Pb) and other heavy metals and reducing health and ecological risks associated with contaminated soils. However, a longterm assessment of risk reduction induced by metal immobilization is needed to verify efficacy and gain regulatory and public acceptance of phosphate-based and organic matter-based remedial technologies. The study sites included a smelter-contaminated urban site, a mill-waste contaminated site, and a mining-waste contaminated site within the Jasper County Superfund Site, Southwestern Missouri. Field plots at the urban site were treated with phosphoric acid at a rate of 10 g kg−1 using surface application (SA), rototilling (RT), and pressure injection (PI); plots at the mill-waste site were treated with phosphoric acid at rates of 7.5 and 10 g kg−1 and incorporated using rototilling; plots at the mining-waste site were treated with different types of organic amendments, including biosolids and agricultural byproducts. The parameters chosen to assess long-term risk reduction were: (1) metal bioavailability to organisms; (2) metal availability to plants (i.e., phytoavailability); (3) toxicity of treated soils to microorganisms; (4) phosphate and metal stability; and (5) solid phase P and Pb speciation assessed using microscopic, spectroscopic, and chemical fractionation techniques. Results demonstrated that most of the phosphoric acid and OM treatments significantly reduced bioavailability, phytoavailability, and leachability of metals (Pb and Cd) in the contaminated soil. Analysis of P and Pb fractionation confirmed these reductions as well. In addition, most of treatments did not significantly impact toxicity in the soil to microorganisms. Thus, the in situ remediation of metal contaminated soil using phosphoric acid and OM is considered to be a practical remediation strategy with longterm benefits.
Bioaccessibility Based In-situ Remediation of Lead-contaminated Soils Using Local Materials
Author: Martina Laura Vázquez MirandaPublisher:
ISBN:
Category : In situ remediation
Languages : en
Pages : 107
Book Description
Lead (Pb) speciation in soil is key for bioavailability assessment and exposure risk to humans from Pb contaminated soils. Soil ingestion is the main exposure pathway in Pb contaminated soils and in vitro bioaccessibility assays (IVBA) can predict relative bioavailable (RBA) Pb in soil by mimicking the GI tract conditions without traditional expensive animal feeding studies. In situ soil remediation has been considered an effective ecological treatment option compared to ex-situ techniques. The use of amendments such as biosolids, biochar, compost and phosphorous (P) amendments have been effective to decrease RBA in soils and, in doing so, reducing human exposure to the contaminant. In this study, soil amendments including biosolids, compost, wood-ash, biochar, soluble phosphate (SP) and their combinations were applied to Pb contaminated soil. Soil samples were incubated for up to 6 months at constant temperature, moisture and humidity. Samples were taken at three time points 1 (t1), 4 (t2) and 6 (t3) months of incubation and analyzed for total metal content, bioaccessible Pb (%IVBA-Pb), bioaccessible arsenic (%IVBA-As), organic carbon content (Org C), pH, extractable P and other key properties to determine the best treatment to reduce bioavailability of lead while improving soil health. Phosphorous was the most effective amendment to reduce %IVBA-Pb. Whether as individual or combined amendments, SP and biosolids resulted in 25-50% reductions of %IVBA Pb. Organic C addition did not reduce %IVBA-Pb, indicating complexation was not relevant for chemical immobilization of Pb in the case of strongly acidic soils such as the ones used in this experiment. %IVBA-As was correlated with pH and not P addition nor Organic C addition. Biosolid addition produced, apart from an expected plant available P increase, a great increase in Mineralizable Nitrogen content in the soils. Considering the importance of Nitrogen as an essential nutrient in plant growth, these results indicate that this amendment would be suitable for decreasing %IVBA-Pb and overall exposure to Pb contaminated soils. This is due to ensuring plant cover in the soils and decreasing soil erosion and loss, with the subsequent Pb dust dispersion, decreasing possible ingestion rates of the soil.