Synergistic Effects of Calcium Peroxide and Fe<sub>3</sub>O<sub>4</sub>@BC Composites on AVS Removal, Phosphorus and Chromium Release in Sediments
Black odorous sediment pollution in urban areas has received widespread attention, especially pollution caused by acidified volatile sulfide (AVS), phosphorus and heavy metals. In this study, an Fe<sub>3</sub>O<sub>4</sub>@BC composite was fabricated by the coprecipitate meth...
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MDPI AG
2022-05-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/10/1626 |
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| author | Yintian Li Yanchun Huang Xueying Wang Ge Gou Chao Liu Jun Li Yuxin He Naiwen Li |
| author_facet | Yintian Li Yanchun Huang Xueying Wang Ge Gou Chao Liu Jun Li Yuxin He Naiwen Li |
| author_sort | Yintian Li |
| collection | DOAJ |
| description | Black odorous sediment pollution in urban areas has received widespread attention, especially pollution caused by acidified volatile sulfide (AVS), phosphorus and heavy metals. In this study, an Fe<sub>3</sub>O<sub>4</sub>@BC composite was fabricated by the coprecipitate method of Fe<sub>3</sub>O<sub>4</sub> and biochar (BC) and was mixed with calcium peroxide (CP) for sediment pollution treatment. The results showed that the AVS removal rate could reach 52.8% in the CP+Fe<sub>3</sub>O<sub>4</sub>@BC system and −18.1% in the control group on the 25th day. AVS was removed in the following three ways: AVS could be oxidized with oxygen produced by CP; H<sub>2</sub>O<sub>2</sub> produced from CP also could be activated by Fe<sup>2+</sup> to generate hydroxyl radicals that have strong oxidation properties to oxidize AVS; AVS could also be removed by bacterial denitrification. As for phosphorus, total phosphorus (TP) content in overlying water remained at 0.1 mg/L after CP and Fe<sub>3</sub>O<sub>4</sub>@BC were added. This is due to the conversion of NH<sub>4</sub>Cl-P and Fe/Al-P into Ca-P in sediments, which inhibited the release of phosphorus. Simultaneously, the release and migration of heavy metal chromium (Cr) were slowed, as demonstrated by the results (the acid extractable and reducible states of Cr in the sediment decreased to 0.58% and 0.97%, respectively). In addition, the results of the high-throughput genetic test showed the total number of microorganisms greatly increased in the CP+Fe<sub>3</sub>O<sub>4</sub>@BC group. The abundance of Sulfurovum increased while that of sulphate-reducing bacteria (SRBs) was inhibited. Furthermore, the abundance of denitrifying bacteria (Dechlorominas, Acinetobacter and Flavobacterium) was increased. In brief, our study showed the synergistic effect of Fe<sub>3</sub>O<sub>4</sub>@BC composites and CP had a remarkable effect on the urban sediment treatment, which provides a new way to remove sediment pollution. |
| first_indexed | 2024-03-10T01:34:53Z |
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| id | doaj.art-c6d54e3a3f0e47129e069b4cd512ef70 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
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| publishDate | 2022-05-01 |
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| spelling | doaj.art-c6d54e3a3f0e47129e069b4cd512ef702023-11-23T13:35:20ZengMDPI AGWater2073-44412022-05-011410162610.3390/w14101626Synergistic Effects of Calcium Peroxide and Fe<sub>3</sub>O<sub>4</sub>@BC Composites on AVS Removal, Phosphorus and Chromium Release in SedimentsYintian Li0Yanchun Huang1Xueying Wang2Ge Gou3Chao Liu4Jun Li5Yuxin He6Naiwen Li7College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaBlack odorous sediment pollution in urban areas has received widespread attention, especially pollution caused by acidified volatile sulfide (AVS), phosphorus and heavy metals. In this study, an Fe<sub>3</sub>O<sub>4</sub>@BC composite was fabricated by the coprecipitate method of Fe<sub>3</sub>O<sub>4</sub> and biochar (BC) and was mixed with calcium peroxide (CP) for sediment pollution treatment. The results showed that the AVS removal rate could reach 52.8% in the CP+Fe<sub>3</sub>O<sub>4</sub>@BC system and −18.1% in the control group on the 25th day. AVS was removed in the following three ways: AVS could be oxidized with oxygen produced by CP; H<sub>2</sub>O<sub>2</sub> produced from CP also could be activated by Fe<sup>2+</sup> to generate hydroxyl radicals that have strong oxidation properties to oxidize AVS; AVS could also be removed by bacterial denitrification. As for phosphorus, total phosphorus (TP) content in overlying water remained at 0.1 mg/L after CP and Fe<sub>3</sub>O<sub>4</sub>@BC were added. This is due to the conversion of NH<sub>4</sub>Cl-P and Fe/Al-P into Ca-P in sediments, which inhibited the release of phosphorus. Simultaneously, the release and migration of heavy metal chromium (Cr) were slowed, as demonstrated by the results (the acid extractable and reducible states of Cr in the sediment decreased to 0.58% and 0.97%, respectively). In addition, the results of the high-throughput genetic test showed the total number of microorganisms greatly increased in the CP+Fe<sub>3</sub>O<sub>4</sub>@BC group. The abundance of Sulfurovum increased while that of sulphate-reducing bacteria (SRBs) was inhibited. Furthermore, the abundance of denitrifying bacteria (Dechlorominas, Acinetobacter and Flavobacterium) was increased. In brief, our study showed the synergistic effect of Fe<sub>3</sub>O<sub>4</sub>@BC composites and CP had a remarkable effect on the urban sediment treatment, which provides a new way to remove sediment pollution.https://www.mdpi.com/2073-4441/14/10/1626black odorous sedimentFe<sub>3</sub>O<sub>4</sub>@BC compositescalcium peroxidepollutantmicroorganisms |
| spellingShingle | Yintian Li Yanchun Huang Xueying Wang Ge Gou Chao Liu Jun Li Yuxin He Naiwen Li Synergistic Effects of Calcium Peroxide and Fe<sub>3</sub>O<sub>4</sub>@BC Composites on AVS Removal, Phosphorus and Chromium Release in Sediments Water black odorous sediment Fe<sub>3</sub>O<sub>4</sub>@BC composites calcium peroxide pollutant microorganisms |
| title | Synergistic Effects of Calcium Peroxide and Fe<sub>3</sub>O<sub>4</sub>@BC Composites on AVS Removal, Phosphorus and Chromium Release in Sediments |
| title_full | Synergistic Effects of Calcium Peroxide and Fe<sub>3</sub>O<sub>4</sub>@BC Composites on AVS Removal, Phosphorus and Chromium Release in Sediments |
| title_fullStr | Synergistic Effects of Calcium Peroxide and Fe<sub>3</sub>O<sub>4</sub>@BC Composites on AVS Removal, Phosphorus and Chromium Release in Sediments |
| title_full_unstemmed | Synergistic Effects of Calcium Peroxide and Fe<sub>3</sub>O<sub>4</sub>@BC Composites on AVS Removal, Phosphorus and Chromium Release in Sediments |
| title_short | Synergistic Effects of Calcium Peroxide and Fe<sub>3</sub>O<sub>4</sub>@BC Composites on AVS Removal, Phosphorus and Chromium Release in Sediments |
| title_sort | synergistic effects of calcium peroxide and fe sub 3 sub o sub 4 sub bc composites on avs removal phosphorus and chromium release in sediments |
| topic | black odorous sediment Fe<sub>3</sub>O<sub>4</sub>@BC composites calcium peroxide pollutant microorganisms |
| url | https://www.mdpi.com/2073-4441/14/10/1626 |
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