Solidification effect of river bottom sediments after flocculation via different composite flocculants
The main problem in the reduction of river bottom sediments is to solve the dewatering of the rive sediments. The reduction of river bottom sediments is usually dehydrated by natural air drying and requires more time and economic costs. Different proportions of composite flocculants and curing agent...
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| Veröffentlicht in: | Environmental science and pollution research international 2021-03, Vol.28 (10), p.12613-12627 |
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| description | The main problem in the reduction of river bottom sediments is to solve the dewatering of the rive sediments. The reduction of river bottom sediments is usually dehydrated by natural air drying and requires more time and economic costs. Different proportions of composite flocculants and curing agents have been developed to the reduction of river bottom sediments according to the requirements of the project. Two or more flocculants were mixed with the rive sediments. Therefore, anionic polyacrylamide (PAM), polyaluminum chloride (PAC), polysilicate aluminum ferric (PSAF), and iron perchloride (IC) were selected for flocculation of river sediments. Through the sedimentation column test, the relationship between sedimentation amount and time was plotted, the turbidity value and pH value of the supernatant filtration supernatant were detected, and the flocculation effect of different flocculants was evaluated to obtain suitable groups of composite flocculants. The optimum ratio of two types of polyacrylamide with a molecular weight of 18 million and 23 million was 3:7. The turbidity of the supernatant of water could well be reduced by adding polysilicate aluminum ferric. Finally, the 6 groups of composite flocculants were determined according to the sedimentation and the turbidity value of the supernatant. The relative water content was maintained at about 60% before and after flocculation. At the same curing age, the compressive strength increased as the amount of curing agent increased after flocculation. At the same curing agent dosage, the overall solidification effect was reduced with increase of curing time after flocculation. |
| doi_str_mv | 10.1007/s11356-020-11242-9 |
| format | Article |
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The reduction of river bottom sediments is usually dehydrated by natural air drying and requires more time and economic costs. Different proportions of composite flocculants and curing agents have been developed to the reduction of river bottom sediments according to the requirements of the project. Two or more flocculants were mixed with the rive sediments. Therefore, anionic polyacrylamide (PAM), polyaluminum chloride (PAC), polysilicate aluminum ferric (PSAF), and iron perchloride (IC) were selected for flocculation of river sediments. Through the sedimentation column test, the relationship between sedimentation amount and time was plotted, the turbidity value and pH value of the supernatant filtration supernatant were detected, and the flocculation effect of different flocculants was evaluated to obtain suitable groups of composite flocculants. The optimum ratio of two types of polyacrylamide with a molecular weight of 18 million and 23 million was 3:7. The turbidity of the supernatant of water could well be reduced by adding polysilicate aluminum ferric. Finally, the 6 groups of composite flocculants were determined according to the sedimentation and the turbidity value of the supernatant. The relative water content was maintained at about 60% before and after flocculation. At the same curing age, the compressive strength increased as the amount of curing agent increased after flocculation. At the same curing agent dosage, the overall solidification effect was reduced with increase of curing time after flocculation.</description><identifier>ISSN: 0944-1344</identifier><identifier>EISSN: 1614-7499</identifier><identifier>DOI: 10.1007/s11356-020-11242-9</identifier><identifier>PMID: 33085007</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Air drying ; Aluminum ; Aquatic Pollution ; Atmospheric Protection/Air Quality Control/Air Pollution ; Bottom sediments ; Compressive strength ; Curing ; Curing agents ; Dehydration ; Dewatering ; Dosage ; Drying ; Earth and Environmental Science ; Economic impact ; Ecotoxicology ; Environment ; Environmental Chemistry ; Environmental Health ; Environmental science ; Flocculants ; Flocculation ; Fluvial sediments ; Iron ; Moisture content ; Molecular weight ; Polyacrylamide ; Reduction ; Research Article ; Rivers ; Sedimentation ; Sedimentation & deposition ; Sediments ; Solidification ; Turbidity ; Waste Water Technology ; Water ; Water content ; Water Management ; Water Pollution Control ; Water Purification</subject><ispartof>Environmental science and pollution research international, 2021-03, Vol.28 (10), p.12613-12627</ispartof><rights>Springer-Verlag GmbH Germany, part of Springer Nature 2020</rights><rights>Springer-Verlag GmbH Germany, part of Springer Nature 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c412t-78b65fdf43b917a9c2770c2ffcc03c67b09325c5fb773b8bb32d42cd81478c833</citedby><cites>FETCH-LOGICAL-c412t-78b65fdf43b917a9c2770c2ffcc03c67b09325c5fb773b8bb32d42cd81478c833</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11356-020-11242-9$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11356-020-11242-9$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33085007$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sun, Linzhu</creatorcontrib><creatorcontrib>Zheng, Yunyun</creatorcontrib><creatorcontrib>Yu, Xiaoniu</creatorcontrib><title>Solidification effect of river bottom sediments after flocculation via different composite flocculants</title><title>Environmental science and pollution research international</title><addtitle>Environ Sci Pollut Res</addtitle><addtitle>Environ Sci Pollut Res Int</addtitle><description>The main problem in the reduction of river bottom sediments is to solve the dewatering of the rive sediments. The reduction of river bottom sediments is usually dehydrated by natural air drying and requires more time and economic costs. Different proportions of composite flocculants and curing agents have been developed to the reduction of river bottom sediments according to the requirements of the project. Two or more flocculants were mixed with the rive sediments. Therefore, anionic polyacrylamide (PAM), polyaluminum chloride (PAC), polysilicate aluminum ferric (PSAF), and iron perchloride (IC) were selected for flocculation of river sediments. Through the sedimentation column test, the relationship between sedimentation amount and time was plotted, the turbidity value and pH value of the supernatant filtration supernatant were detected, and the flocculation effect of different flocculants was evaluated to obtain suitable groups of composite flocculants. The optimum ratio of two types of polyacrylamide with a molecular weight of 18 million and 23 million was 3:7. The turbidity of the supernatant of water could well be reduced by adding polysilicate aluminum ferric. Finally, the 6 groups of composite flocculants were determined according to the sedimentation and the turbidity value of the supernatant. The relative water content was maintained at about 60% before and after flocculation. At the same curing age, the compressive strength increased as the amount of curing agent increased after flocculation. At the same curing agent dosage, the overall solidification effect was reduced with increase of curing time after flocculation.</description><subject>Air drying</subject><subject>Aluminum</subject><subject>Aquatic Pollution</subject><subject>Atmospheric Protection/Air Quality Control/Air Pollution</subject><subject>Bottom sediments</subject><subject>Compressive strength</subject><subject>Curing</subject><subject>Curing agents</subject><subject>Dehydration</subject><subject>Dewatering</subject><subject>Dosage</subject><subject>Drying</subject><subject>Earth and Environmental Science</subject><subject>Economic impact</subject><subject>Ecotoxicology</subject><subject>Environment</subject><subject>Environmental Chemistry</subject><subject>Environmental Health</subject><subject>Environmental science</subject><subject>Flocculants</subject><subject>Flocculation</subject><subject>Fluvial sediments</subject><subject>Iron</subject><subject>Moisture content</subject><subject>Molecular weight</subject><subject>Polyacrylamide</subject><subject>Reduction</subject><subject>Research Article</subject><subject>Rivers</subject><subject>Sedimentation</subject><subject>Sedimentation & deposition</subject><subject>Sediments</subject><subject>Solidification</subject><subject>Turbidity</subject><subject>Waste Water Technology</subject><subject>Water</subject><subject>Water content</subject><subject>Water Management</subject><subject>Water Pollution Control</subject><subject>Water 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effect of river bottom sediments after flocculation via different composite flocculants</title><author>Sun, Linzhu ; Zheng, Yunyun ; Yu, Xiaoniu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c412t-78b65fdf43b917a9c2770c2ffcc03c67b09325c5fb773b8bb32d42cd81478c833</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Air drying</topic><topic>Aluminum</topic><topic>Aquatic Pollution</topic><topic>Atmospheric Protection/Air Quality Control/Air Pollution</topic><topic>Bottom sediments</topic><topic>Compressive strength</topic><topic>Curing</topic><topic>Curing agents</topic><topic>Dehydration</topic><topic>Dewatering</topic><topic>Dosage</topic><topic>Drying</topic><topic>Earth and Environmental Science</topic><topic>Economic impact</topic><topic>Ecotoxicology</topic><topic>Environment</topic><topic>Environmental Chemistry</topic><topic>Environmental 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The reduction of river bottom sediments is usually dehydrated by natural air drying and requires more time and economic costs. Different proportions of composite flocculants and curing agents have been developed to the reduction of river bottom sediments according to the requirements of the project. Two or more flocculants were mixed with the rive sediments. Therefore, anionic polyacrylamide (PAM), polyaluminum chloride (PAC), polysilicate aluminum ferric (PSAF), and iron perchloride (IC) were selected for flocculation of river sediments. Through the sedimentation column test, the relationship between sedimentation amount and time was plotted, the turbidity value and pH value of the supernatant filtration supernatant were detected, and the flocculation effect of different flocculants was evaluated to obtain suitable groups of composite flocculants. The optimum ratio of two types of polyacrylamide with a molecular weight of 18 million and 23 million was 3:7. The turbidity of the supernatant of water could well be reduced by adding polysilicate aluminum ferric. Finally, the 6 groups of composite flocculants were determined according to the sedimentation and the turbidity value of the supernatant. The relative water content was maintained at about 60% before and after flocculation. At the same curing age, the compressive strength increased as the amount of curing agent increased after flocculation. At the same curing agent dosage, the overall solidification effect was reduced with increase of curing time after flocculation.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>33085007</pmid><doi>10.1007/s11356-020-11242-9</doi><tpages>15</tpages></addata></record> |
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| subjects | Air drying Aluminum Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Bottom sediments Compressive strength Curing Curing agents Dehydration Dewatering Dosage Drying Earth and Environmental Science Economic impact Ecotoxicology Environment Environmental Chemistry Environmental Health Environmental science Flocculants Flocculation Fluvial sediments Iron Moisture content Molecular weight Polyacrylamide Reduction Research Article Rivers Sedimentation Sedimentation & deposition Sediments Solidification Turbidity Waste Water Technology Water Water content Water Management Water Pollution Control Water Purification |
| title | Solidification effect of river bottom sediments after flocculation via different composite flocculants |
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