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Open AccessArticle

The Application of Seabed Silt in the Preparation of Artificial Algal Reefs

Marine College, Shandong University, Weihai 264209, China
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Appl. Sci. 2020, 10(20), 7279; https://doi.org/10.3390/app10207279
Received: 17 September 2020 / Revised: 14 October 2020 / Accepted: 15 October 2020 / Published: 17 October 2020
(This article belongs to the Special Issue Green Concrete for a Better Sustainable Environment II)
Large amounts of silt have been deposited on the seabed in China’s coastal areas due to intensive coastal development and marine raft aquaculture, which are the main causes of local marine environmental disasters. In this study, seabed silt was tested as a potential raw material for artificial reefs. The silt was mixed with cement in four proportions to create concrete specimens for use in silt artificial reefs (SARs). The compressive strength development and nutrient dissolution were examined in the SAR specimens. The hydration products of the SAR paste were investigated through X-ray diffraction (XRD), scanning election microscope (SEM), and differential scanning calorimetry (DSC) techniques. The results showed that the compression strength of the SAR specimens was inversely proportional to their seabed silt content. The SAR specimens were able to continuously dissolve nitrogen-containing nutrients. The presence of Ca(OH)2, commonly found in traditional concrete, was not detected, which may help improve the seaweed adhesion and biological effects of artificial reefs. The effective utilization of seabed silt could serve to restore and improve the marine ecological environment. View Full-Text
Keywords: artificial algal reef; seabed silt; compressive strength; dissolution of nutrients; hydration products; environmental restoration artificial algal reef; seabed silt; compressive strength; dissolution of nutrients; hydration products; environmental restoration
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Jiang, Z.; Zhang, J.; Nie, Z.; Guo, Z.; Zhu, L.; Cong, W.; Chen, Y.; Liang, Z. The Application of Seabed Silt in the Preparation of Artificial Algal Reefs. Appl. Sci. 2020, 10, 7279.

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