土壤污染及防治英語-在線瀏覽
2025-02-26 00:55本頁面
【正文】 tion of the state of the natural balance of the soil system pletely soil quality deterioration or recession phenomenon. 2 major pollutants contaminants (such as heavy metals, acids, salts, etc.) pesticides (such as fertilizers, pesticides, herbicides, etc.) waste (such as biodegradable or degradable anic waste, etc.) , slag and fly ash, radioactive substances, parasites, pathogens 1 soil pollution has hidden and lag 2 Accumulation of soil pollution 3 soil pollution irreversible 4 soil pollution refractory rational of land contamination Second. Soil pollution reasons 1 sewage for irrigation 2 air pollution 3 excessive application of fertilizers 4 heavy use of pesticides 5 solid waste 6 of heavy metals 7 radioactive material contamination of soil 1 sewage for irrigation Sewage and industrial waste water, containing nitrogen, phosphorus, potassium and many plants need nutrients, so reasonable use of Sewage Irrigation, general stimulation containing heavy metals, phenols, cyanide and other toxic and hazardous substances directly used for farmland irrigation, will pollute the soil. 2 air pollution Atmospheric pollution can be divided into two categories: gas pollution, such as sulfur dioxide, fluoride, ozone, nitrogen oxides, hydrocarbons, etc.。 aerosol pollution, such as dust, soot and other solid particles and liquid smoke, fog and other particles, they are by sedimentationor precipitation into the soil and cause pollution. application of fertilizers. Longterm largescale use of chemical fertilizers such as nitrogen, phosphorus, will destroy the soil structure, resulting in soil paction, degradation of arable soil tilth shallow plowing deteriorated secu
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