Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent Polymer
Every year, a significant quantity of dredged soil is generated as a result of channel dredging operations. However, there is relatively little evidence available regarding the sustainable reuse of dredged soils. In this study, an improved substrate material mainly composed of dredged soil was devel...
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| Format: | Article |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6612513 |
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| author | Ling Mei Yuxiang Chen Lei Wang |
| author_facet | Ling Mei Yuxiang Chen Lei Wang |
| author_sort | Ling Mei |
| collection | DOAJ |
| description | Every year, a significant quantity of dredged soil is generated as a result of channel dredging operations. However, there is relatively little evidence available regarding the sustainable reuse of dredged soils. In this study, an improved substrate material mainly composed of dredged soil was developed to examine the effects of three substrate amendments on the soil’s nutritional content, physical properties, and water retention capacity, as well as the germination rate of tall fescue. The orthogonal combination of the three substrates was controlled in a pot experiment using polyacrylamide (PAM), rice straw, and superabsorbent polymer (SAP) at application rates of 0.5, 1, 1.5, 2, and 2.5 g/kg; 15, 20, 25, 30, and 35 g/kg; and 0, 3, 6, 9, and 12 g/kg, respectively. The results showed that adequate application of PAM may improve the water retention capacity and available N retention capacity of dredged soil. PAM inhibited tall fescue germination significantly when the concentration exceeded 0.5 g/kg (p < 0.05). The addition of rice straw significantly improved the nutritional content of dredging soil and the germination rate of tall fescue (p < 0.05). Increased SAP significantly decreased the bulk density of dredged soil (p < 0.05). The lowest test group was 48.20% less than CK. This study offers novel ideas for the sustainable reuse of dredged soil and serves as a guide for future research aimed at increasing the effectiveness of external-soil spray seeding technologies. |
| format | Article |
| id | doaj-art-8efff5d564ce4dedb3cf4632765777c6 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
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| series | Advances in Civil Engineering |
| spelling | doaj-art-8efff5d564ce4dedb3cf4632765777c62025-02-03T01:24:55ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/66125136612513Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent PolymerLing Mei0Yuxiang Chen1Lei Wang2College of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaCollege of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaCollege of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaEvery year, a significant quantity of dredged soil is generated as a result of channel dredging operations. However, there is relatively little evidence available regarding the sustainable reuse of dredged soils. In this study, an improved substrate material mainly composed of dredged soil was developed to examine the effects of three substrate amendments on the soil’s nutritional content, physical properties, and water retention capacity, as well as the germination rate of tall fescue. The orthogonal combination of the three substrates was controlled in a pot experiment using polyacrylamide (PAM), rice straw, and superabsorbent polymer (SAP) at application rates of 0.5, 1, 1.5, 2, and 2.5 g/kg; 15, 20, 25, 30, and 35 g/kg; and 0, 3, 6, 9, and 12 g/kg, respectively. The results showed that adequate application of PAM may improve the water retention capacity and available N retention capacity of dredged soil. PAM inhibited tall fescue germination significantly when the concentration exceeded 0.5 g/kg (p < 0.05). The addition of rice straw significantly improved the nutritional content of dredging soil and the germination rate of tall fescue (p < 0.05). Increased SAP significantly decreased the bulk density of dredged soil (p < 0.05). The lowest test group was 48.20% less than CK. This study offers novel ideas for the sustainable reuse of dredged soil and serves as a guide for future research aimed at increasing the effectiveness of external-soil spray seeding technologies.http://dx.doi.org/10.1155/2021/6612513 |
| spellingShingle | Ling Mei Yuxiang Chen Lei Wang Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent Polymer Advances in Civil Engineering |
| title | Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent Polymer |
| title_full | Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent Polymer |
| title_fullStr | Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent Polymer |
| title_full_unstemmed | Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent Polymer |
| title_short | Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent Polymer |
| title_sort | sustainable reuse of dredged soil as a substrate material by improvement with polyacrylamide straw and superabsorbent polymer |
| url | http://dx.doi.org/10.1155/2021/6612513 |
| work_keys_str_mv | AT lingmei sustainablereuseofdredgedsoilasasubstratematerialbyimprovementwithpolyacrylamidestrawandsuperabsorbentpolymer AT yuxiangchen sustainablereuseofdredgedsoilasasubstratematerialbyimprovementwithpolyacrylamidestrawandsuperabsorbentpolymer AT leiwang sustainablereuseofdredgedsoilasasubstratematerialbyimprovementwithpolyacrylamidestrawandsuperabsorbentpolymer |