Biosolids and heavy metals in soils
The application of sewage sludge or biosolids on soils has been widespread in agricultural areas. However, depending on their characteristics, they may cause increase in heavy metal concentration of treated soils. In general, domestic biosolids have lower heavy metal contents than industrial ones. O...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2003-01-01
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| Series: | Scientia Agricola |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400029 |
| _version_ | 1819154635337760768 |
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| author | Silveira Maria Lucia Azevedo Alleoni Luís Reynaldo Ferracciú Guilherme Luiz Roberto Guimarães |
| author_facet | Silveira Maria Lucia Azevedo Alleoni Luís Reynaldo Ferracciú Guilherme Luiz Roberto Guimarães |
| author_sort | Silveira Maria Lucia Azevedo |
| collection | DOAJ |
| description | The application of sewage sludge or biosolids on soils has been widespread in agricultural areas. However, depending on their characteristics, they may cause increase in heavy metal concentration of treated soils. In general, domestic biosolids have lower heavy metal contents than industrial ones. Origin and treatment method of biosolids may markedly influence their characteristics. The legislation that controls the levels of heavy metal contents in biosolids and the maximum concentrations in soils is still controversial. In the long-term, heavy metal behavior after the and of biosolid application is still unknown. In soils, heavy metals may be adsorbed via specific or non-specific adsorption reactions. Iron oxides and organic matter are the most important soil constituents retaining heavy metals. The pH, CEC and the presence of competing ions also affect heavy metal adsorption and speciation in soils. In solution, heavy metals can be present either as free-ions or complexed with organic and inorganic ligands. Generally, free-ions are more relevant in environmental pollution studies since they are readily bioavailable. Some computer models can estimate heavy metal activity in solution and their ionic speciation. Thermodynamic data (thermodynamic stability constant), total metal and ligand concentrations are used by the GEOCHEM-PC program. This program allows studying heavy metal behavior in solution and the effect of changes in the conditions, such as pH and ionic strength and the application of organic and inorganic ligands caused by soil fertilization. |
| first_indexed | 2024-12-22T15:24:13Z |
| format | Article |
| id | doaj.art-215513728b4c41e69ddf542761be61eb |
| institution | Directory Open Access Journal |
| issn | 0103-9016 1678-992X |
| language | English |
| last_indexed | 2024-12-22T15:24:13Z |
| publishDate | 2003-01-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Scientia Agricola |
| spelling | doaj.art-215513728b4c41e69ddf542761be61eb2022-12-21T18:21:32ZengUniversidade de São PauloScientia Agricola0103-90161678-992X2003-01-01604793806Biosolids and heavy metals in soilsSilveira Maria Lucia AzevedoAlleoni Luís Reynaldo FerracciúGuilherme Luiz Roberto GuimarãesThe application of sewage sludge or biosolids on soils has been widespread in agricultural areas. However, depending on their characteristics, they may cause increase in heavy metal concentration of treated soils. In general, domestic biosolids have lower heavy metal contents than industrial ones. Origin and treatment method of biosolids may markedly influence their characteristics. The legislation that controls the levels of heavy metal contents in biosolids and the maximum concentrations in soils is still controversial. In the long-term, heavy metal behavior after the and of biosolid application is still unknown. In soils, heavy metals may be adsorbed via specific or non-specific adsorption reactions. Iron oxides and organic matter are the most important soil constituents retaining heavy metals. The pH, CEC and the presence of competing ions also affect heavy metal adsorption and speciation in soils. In solution, heavy metals can be present either as free-ions or complexed with organic and inorganic ligands. Generally, free-ions are more relevant in environmental pollution studies since they are readily bioavailable. Some computer models can estimate heavy metal activity in solution and their ionic speciation. Thermodynamic data (thermodynamic stability constant), total metal and ligand concentrations are used by the GEOCHEM-PC program. This program allows studying heavy metal behavior in solution and the effect of changes in the conditions, such as pH and ionic strength and the application of organic and inorganic ligands caused by soil fertilization.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400029sewage sludgeadsorptionspeciationpHorganic matter |
| spellingShingle | Silveira Maria Lucia Azevedo Alleoni Luís Reynaldo Ferracciú Guilherme Luiz Roberto Guimarães Biosolids and heavy metals in soils Scientia Agricola sewage sludge adsorption speciation pH organic matter |
| title | Biosolids and heavy metals in soils |
| title_full | Biosolids and heavy metals in soils |
| title_fullStr | Biosolids and heavy metals in soils |
| title_full_unstemmed | Biosolids and heavy metals in soils |
| title_short | Biosolids and heavy metals in soils |
| title_sort | biosolids and heavy metals in soils |
| topic | sewage sludge adsorption speciation pH organic matter |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400029 |
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