By Elham Asrari
Although antagonistic wellbeing and fitness results of heavy metals were recognized for a very long time, publicity to heavy metals maintains and is even expanding in a few components. Remediating heavy steel infected soils and water is important to lessen the linked overall healthiness and ecological hazards, make the land source to be had for agricultural creation, increase nutrition protection, and curb land tenure difficulties. This ebook discusses the factors and the environmental impression of heavy steel infection. It then explores many interesting new tools of research and decontamination presently studied and utilized within the box today.
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Additional resources for Heavy Metal Contamination of Water and Soil: Analysis, Assessment, and Remediation Strategies
Sample text
The method’s disadvantages include (i) high invasivity to the environment, (ii) generation of a significant amount of solid wastes (twice as large as volume after processing), (iii) the byproduct must be stored on a special landfill site, (iv) in the case of changing of the physicochemical condition in the side product or its surroundings, there is serious danger of the release of additional contaminants to the environment, and (v) permanent control of the stored wastes is required. In the in situ technique, the fixing agents amendments are applied on the unexcavated soil.
1 INTRODUCTION Soils may become contaminated by the accumulation of heavy metals and metalloids through emissions from the rapidly expanding industrial areas, mine tailings, disposal of high metal wastes, leaded gasoline and paints, land application of fertilizers, animal manures, sewage sludge, pesticides, wastewater irrigation, coal combustion residues, spillage of petrochemicals, and atmospheric deposition [1, 2]. Heavy metals constitute an illdefined group of inorganic chemical hazards, and those most commonly found at contaminated sites are lead (Pb), chromium (Cr), arsenic (As), zinc (Zn), cadmium (Cd), copper (Cu), mercury (Hg), and nickel (Ni) [3].
Soils contaminated with trace metals may pose both direct and indirect threats: direct, through negative effects of metals on crop growth and yield, and indirect, by entering the human food chain with a potentially negative impact on human health. Even a reduction of crop yield by a few percent could lead to a significant long-term loss in production and income. Some food importers are now specifying acceptable maximum Heavy Metals in Contaminated Soils 17 contents of metals in food, which might limit the possibility for the farmers to export their contaminated crops [36].
