Lead immobilization of from aqueous solutions and contaminated soils using phosphate rocks

Article Abstract:

The ability of phosphate rocks to immobilize lead (Pb) from aqueous solutions and contaminated soils investigated. Experiments were carried out wherein different amounts of phosphate rocks were made to react with Pb-contaminated liquid solutions and soils. An atomic absorption spectrophotometer was used to determine the total metal concentrations and the total dissolved phosphate. Results indicate that Pb immobilization was achieved due to the dissolution of phosphate rocks and the precipitation of a fluoropyromorphite-like mineral.

Methods, Usage, Soil disinfection, Soils, Phosphate rock

---

Chemical and mineralogical characterizations of Pb in a contaminated soil: reactions with synthetic apatite

Article Abstract:

An examination of the interactions of selected lead minerals and a lead-contaminated soil with apatite reveals that apatite amendments to Pb-contaminated soil materials can lead to the formation of hydroxypyromorphite (HP) after a reaction period of two days. The formation also caused substantial decreases in aqueous Pb concentrations. The extent of reaction is dependent upon pH, with more HP formation at pH 5 than at pH 6 or pH 7.

Primary nonferrous metals, not elsewhere classified, Lead, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Phosphate rock, Phosphate Rock Mining, Lead products, Environmental aspects, Nonmetal mining, Apatite, Apatites

---

Oxyanion behavior in alkaline environments: sorption and desorption of arsenate in ettringite

Article Abstract:

The sorption of arsenate by ettringite is not affected when the arsenate solution is alkaline, but sorption behavior is affected by the concentration of the ettringite suspension. The main mechanisms for sorption of arsenate by ettringite appears to be channel substitution and surface complexation, at least at arsenate concentrations lower than 0.1 mM.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Arsenic & Compounds, Arsenic compounds, Soil absorption and adsorption, Absorption, Soil science

Similar abstracts:

• Abstracts: Respeciation of organic gas emissions and the detection of excess unburned gasoline in the atmosphere. Human cell mutagens in Los Angeles air
• Abstracts: Voltammetric characterization of Iron(II) sulfide complexes in laboratory solutions and in marine waters and porewaters
• Abstracts: Interaction of phase transformation and diffusion in steels. Measurement of thickness-average residual stress near the edge of a thin laser peened strip
• Abstracts: Research on how to develop R&D strategies using the soft systems approach. Management for enhanced R&D productivity
• Abstracts: Organization of zeolite microcrystals for production of functional materials. Selenium/zeolite Y nanocomposites

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.