Simulated study on interactions between heavy metals and organic matter in contaminated soil
In order to understand the interactions between accumulation of organic matter and heavy metals in contaminated soil, an incubation experiment was conducted by adding different levels of organic materials, Pb and Cu to soil. The soil microbial biomass, CO<sub>2</sub>-C released from incu...
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| Format: | Article |
| Language: | English |
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Zhejiang University Press
2009-07-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
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| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2009.04.017 |
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| _version_ | 1849413515150884864 |
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| author | WANG Hao ZHANG Ming-kui |
| author_facet | WANG Hao ZHANG Ming-kui |
| author_sort | WANG Hao |
| collection | DOAJ |
| description | In order to understand the interactions between accumulation of organic matter and heavy metals in contaminated soil, an incubation experiment was conducted by adding different levels of organic materials, Pb and Cu to soil. The soil microbial biomass, CO<sub>2</sub>-C released from incubated soil, and concentrations of heavy metals in particulate organic matter (POM) were monitored, the effect of organic matter on solubility of heavy metals (Pb, Cu) and those of heavy metal addition on respiratory intensity and mineralization of organic matter in contaminated soil were characterized. The results show that both soil microbial biomass and respiratory intensity decreased significantly with increasing addition of Pb and Cu, and thus increased accumulation of soil organic matter. Meanwhile, accumulation of organic matter declined water-extractability and mobility of the metals by formation of metal-enriched organic particles, and thus increased stabilization and sequestration of metals in the soil. It was also found that the POM has great potential to accumulate large amounts of metals by the creation of adsorption sites by microbial degradation of organic matter, with high affinities for metals thus stabilizing metal-POM. The experiments verified a mutual immobilization of metals and POM as organo-metallic complexes in contaminated soil. As a result, organic matter could be stabilized to some degree by metals due to an inhibition of microbial activity caused by toxic effects of metals and strong resistant of POM - heavy metals to biodegradation. This process would simultaneously lead to an increasing organic C and metal contents in the metal-contaminated soil. |
| format | Article |
| id | doaj-art-2c4025ff75ec4301a9e1dc3724bd281e |
| institution | Kabale University |
| issn | 1008-9209 2097-5155 |
| language | English |
| publishDate | 2009-07-01 |
| publisher | Zhejiang University Press |
| record_format | Article |
| series | 浙江大学学报. 农业与生命科学版 |
| spelling | doaj-art-2c4025ff75ec4301a9e1dc3724bd281e2025-08-20T03:34:05ZengZhejiang University Press浙江大学学报. 农业与生命科学版1008-92092097-51552009-07-013546046610.3785/j.issn.1008-9209.2009.04.01710089209Simulated study on interactions between heavy metals and organic matter in contaminated soilWANG HaoZHANG Ming-kuiIn order to understand the interactions between accumulation of organic matter and heavy metals in contaminated soil, an incubation experiment was conducted by adding different levels of organic materials, Pb and Cu to soil. The soil microbial biomass, CO<sub>2</sub>-C released from incubated soil, and concentrations of heavy metals in particulate organic matter (POM) were monitored, the effect of organic matter on solubility of heavy metals (Pb, Cu) and those of heavy metal addition on respiratory intensity and mineralization of organic matter in contaminated soil were characterized. The results show that both soil microbial biomass and respiratory intensity decreased significantly with increasing addition of Pb and Cu, and thus increased accumulation of soil organic matter. Meanwhile, accumulation of organic matter declined water-extractability and mobility of the metals by formation of metal-enriched organic particles, and thus increased stabilization and sequestration of metals in the soil. It was also found that the POM has great potential to accumulate large amounts of metals by the creation of adsorption sites by microbial degradation of organic matter, with high affinities for metals thus stabilizing metal-POM. The experiments verified a mutual immobilization of metals and POM as organo-metallic complexes in contaminated soil. As a result, organic matter could be stabilized to some degree by metals due to an inhibition of microbial activity caused by toxic effects of metals and strong resistant of POM - heavy metals to biodegradation. This process would simultaneously lead to an increasing organic C and metal contents in the metal-contaminated soil.https://www.academax.com/doi/10.3785/j.issn.1008-9209.2009.04.017soil pollutionorganic matter sequestrationaccumulation of heavy metalsparticulate organic mattermineralization |
| spellingShingle | WANG Hao ZHANG Ming-kui Simulated study on interactions between heavy metals and organic matter in contaminated soil 浙江大学学报. 农业与生命科学版 soil pollution organic matter sequestration accumulation of heavy metals particulate organic matter mineralization |
| title | Simulated study on interactions between heavy metals and organic matter in contaminated soil |
| title_full | Simulated study on interactions between heavy metals and organic matter in contaminated soil |
| title_fullStr | Simulated study on interactions between heavy metals and organic matter in contaminated soil |
| title_full_unstemmed | Simulated study on interactions between heavy metals and organic matter in contaminated soil |
| title_short | Simulated study on interactions between heavy metals and organic matter in contaminated soil |
| title_sort | simulated study on interactions between heavy metals and organic matter in contaminated soil |
| topic | soil pollution organic matter sequestration accumulation of heavy metals particulate organic matter mineralization |
| url | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2009.04.017 |
| work_keys_str_mv | AT wanghao simulatedstudyoninteractionsbetweenheavymetalsandorganicmatterincontaminatedsoil AT zhangmingkui simulatedstudyoninteractionsbetweenheavymetalsandorganicmatterincontaminatedsoil |