Прогнозирование содержания тяжёлых металлов в почве и кормах при орошении сточными водами
2013; Linguagem: Inglês
ISSN
1996-4277
AutoresТиньгаев Анатолий Владимирович,
Tópico(s)Environmental Sustainability and Technology
ResumoOne of the major sources of environmental pollution and, in particular, the pollution of surface water, is wastewater. Due to the chemical composition of urban wastewater, its use for irrigation alongside with soil fertility improvement and forage crops yields increase may cause heavy metals accumulation in the soil and forages. To reveal the effect of urban wastewater on heavy metals content in soil and agricultural products the data of the research of the Altai Branch of the Research Institute of Agricultural Use of Wastewater “Progress” conducted on irrigated lands of the Rubtsovsk District was used. The experimental plot’s soils were represented by meadow chernozem soils, shallow (29 cm humus layer), low humus (humus content less than 2.8%), medium loamy. The content of many heavy metals in wastewater during the years of the research was below the maximum allowable concentration for drinking water use. An estimative forecast obtained by regression equations showed that wastewater irrigation with the rate of 3000 cu m/ha per year over 30 years results in some accumulation of toxic salts and heavy metals in the soil. However, the values do not exceed the allowable level. When irrigating maize for forage by treated urban wastewater, the accumulation of heavy metals in soil does not exceed toxicity threshold for the entire forecast period.
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