The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term
This study investigated the impact of soil colloidal characteristics on the transfer patterns of different Cu and Cd speciation in contaminated soil treated with three different amendments: lime (L), zero-valent iron (ZVI), and attapulgite (ATP). It seeks to clarify the activation hazards and aging...
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MDPI AG
2024-02-01
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| Series: | Toxics |
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| Online Access: | https://www.mdpi.com/2305-6304/12/2/157 |
| _version_ | 1797296862067163136 |
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| author | Qing Liu Yuan Ding Yuqi Lai Yan Long Hong Shi Min Liu |
| author_facet | Qing Liu Yuan Ding Yuqi Lai Yan Long Hong Shi Min Liu |
| author_sort | Qing Liu |
| collection | DOAJ |
| description | This study investigated the impact of soil colloidal characteristics on the transfer patterns of different Cu and Cd speciation in contaminated soil treated with three different amendments: lime (L), zero-valent iron (ZVI), and attapulgite (ATP). It seeks to clarify the activation hazards and aging processes of these modifications on Cu and Cd. Compared with the control (CK), the available Cu concentrations treated with amendments reduced in the short term (6 months) by 96.49%, 5.54%, and 89.78%, respectively, and Cd declined by 55.43%, 32.31%, and 93.80%, respectively. Over a 12-year period, there was no significant change in the immobile effect with L, while Cu and Cd fell by 19.06% and 40.65% with ZVI and by 7.63% and 40.78% with ATP. Short- and long-term increases in the readily reducible iron and manganese oxide fraction of Cu and Cd were accompanied by a considerable rise in the concentrations of amorphous iron oxide in the soil and colloid after amendment treatment. This suggested that Cu and Cd were immobilized and stabilized in part by amorphous iron oxide. |
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| issn | 2305-6304 |
| language | English |
| last_indexed | 2024-03-07T22:11:56Z |
| publishDate | 2024-02-01 |
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| series | Toxics |
| spelling | doaj.art-4712912876fd4fa8bdaf930fbb43fe782024-02-23T15:36:28ZengMDPI AGToxics2305-63042024-02-0112215710.3390/toxics12020157The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long TermQing Liu0Yuan Ding1Yuqi Lai2Yan Long3Hong Shi4Min Liu5College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, ChinaCollege of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, ChinaCollege of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, ChinaCollege of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, ChinaJiangxi Ecological Environment Monitoring Center, Nanchang 330039, ChinaThis study investigated the impact of soil colloidal characteristics on the transfer patterns of different Cu and Cd speciation in contaminated soil treated with three different amendments: lime (L), zero-valent iron (ZVI), and attapulgite (ATP). It seeks to clarify the activation hazards and aging processes of these modifications on Cu and Cd. Compared with the control (CK), the available Cu concentrations treated with amendments reduced in the short term (6 months) by 96.49%, 5.54%, and 89.78%, respectively, and Cd declined by 55.43%, 32.31%, and 93.80%, respectively. Over a 12-year period, there was no significant change in the immobile effect with L, while Cu and Cd fell by 19.06% and 40.65% with ZVI and by 7.63% and 40.78% with ATP. Short- and long-term increases in the readily reducible iron and manganese oxide fraction of Cu and Cd were accompanied by a considerable rise in the concentrations of amorphous iron oxide in the soil and colloid after amendment treatment. This suggested that Cu and Cd were immobilized and stabilized in part by amorphous iron oxide.https://www.mdpi.com/2305-6304/12/2/157coppercadmiumiron oxidesaging mechanismactivation risk |
| spellingShingle | Qing Liu Yuan Ding Yuqi Lai Yan Long Hong Shi Min Liu The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term Toxics copper cadmium iron oxides aging mechanism activation risk |
| title | The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term |
| title_full | The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term |
| title_fullStr | The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term |
| title_full_unstemmed | The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term |
| title_short | The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term |
| title_sort | immobilization mechanism of inorganic amendments on cu and cd in polluted paddy soil in short long term |
| topic | copper cadmium iron oxides aging mechanism activation risk |
| url | https://www.mdpi.com/2305-6304/12/2/157 |
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