TITLE

Coral Rehabilitation Using Steel Slag as a Substrate

AUTHOR(S)
Mohammed, Tarek Aa; Aa, Hamed; Nf, Habib; Ma, Ezz El-Arab; Khm, El-Moselhy
PUB. DATE
May 2012
SOURCE
International Journal of Environmental Protection;May2012, Vol. 2 Issue 5, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Many researches studied the corals rehabilitation using different techniques all over the world and recorded accepted results. The present experiment presents a new technique and methodology (according to the International Patent) for coral reef transplantation and rehabilitation using Electric Arc Furnace-slag as a substrate for the transplanted corals. Slag is composed mainly of iron oxides (38.07-54.73%), calcium oxides (24.49-34.58%) and silicon oxides (10.23-14.71%) as major constituents, which are chemically stable under the oceanographic conditions throughout the experiment time. In addition, a thin calcium carbonate layer was precipitated on the slag surface from the water column. Three sites were selected to evaluate the steel slag efficiency for coral transplantation. 550 branches and fragments of live corals- Acropora, Stylophora, Favia, Favites, Goniastera and Turbinaria were fixed on the slag by epoxy materials to transplant. After 22 months, about 70.18% of the transplanted corals survived. That the percentage was suddenly dropped and decreased to 49.27% after 24 months may be due to the effect of flood, high turbidity, and the raised water temperature. Finally, the study recommended by using steel slag as a suitable substrate for coral transplantation and larval settlements of the different coral types.
ACCESSION #
83173234

 

Related Articles

  • Dynamic Wetting of CaO-AlO-SiO-MgO Liquid Oxide on MgAlO Spinel. Abdeyazdan, Hamed; Dogan, Neslihan; Rhamdhani, M.; Chapman, Michael; Monaghan, Brian // Metallurgical & Materials Transactions. Part B;Feb2015, Vol. 46 Issue 1, p208 

    Inclusion type and content in steel is critical in steelmaking, affecting both productivity through clogging, and downstream physical properties of the steel. They are normally removed from steel by reacting with a slag (liquid oxide) phase. For efficient inclusion removal, the inclusions must...

  • Should Coral Fragments Collected for Restoration be Subdivided to Create More, Smaller Pieces for Transplanting? Forrester, Graham; Dauksis, Russell; Ferguson, Megan // Ecological Restoration;Mar2013, Vol. 31 Issue 1, p4 

    The article discusses a study which investigated whether coral fragments gathered for restoration should be subdivided to produce smaller and more pieces to be used for transplanting. It states that 110 fragments were collected from Harris Ghut and Great Camanoe in Rhode Island in August 2011....

  • DETERMINATION BY ANALYZING THE CHEMICAL COMPOSITION OF THE DEPOSITED SUBSTRATES SIZES AND OF DIFFUSION ZONES THROUGH THERMAL SPRAYING IN ELECTRICAL ARC. LANDKAMMER, Tudor-Brian; SOLONARIU, Laura-Teodora; CIMPOEŞU, Nicanor; BACIU, Constantin // Metalurgia International;2013 Special Issue Nr. 2, Vol. 18, preceding p5 

    Thermal spraying is composed of a group of processes to obtain thin films, where fine powders, metallic or nonmetallic, will be deposited in molten or semi-molten state to form a coating layer with the properties required for use. Few layers of stainless steel on usual steel substrates were...

  • DETERMINATION BY ANALYZING THE CHEMICAL COMPOSITION OF THE DEPOSITED SUBSTRATES SIZES AND OF DIFFUSION ZONES THROUGH THERMAL SPRAYING IN ELECTRICAL ARC. LANDKAMMER, Tudor-Brian; SOLONARIU, Laura-Teodora; CIMPOEŞU, Nicanor; BACIU, Constantin // Metalurgia International;2013 Special Issue Nr. 2, Vol. 18, p69 

    Thermal spraying is composed of a group of processes to obtain thin films, where fine powders, metallic or nonmetallic, will be deposited in molten or semi-molten state to form a coating layer with the properties required for use. Few layers of stainless steel on usual steel substrates were...

  • Effect of the CaO-AlO-Based Top Slag on the Cleanliness of Stainless Steel During Secondary Metallurgy. Yan, Pengcheng; Huang, Shuigen; Pandelaers, Lieven; Dyck, Joris; Guo, Muxing; Blanpain, Bart // Metallurgical & Materials Transactions. Part B;Oct2013, Vol. 44 Issue 5, p1105 

    The ladle treatment of a 18 pct Cr-9 pct Ni stainless steel, with desulfurization as its main purpose, was simulated on a laboratory scale. The influence of the top slag chemistry on the steel cleanliness was evaluated. A higher steel cleanliness was obtained with an optimized lime-alumina-based...

  • Use of converter furnace steel slag for bacteria removal in flow-through columns. Jin-Kyu Kang; Chang-Gu Lee; Jeong-Ann Park; Song-Bae Kim; Seungho Yu; Tae-Hun Kim // Desalination & Water Treatment;Dec2013, Vol. 51 Issue 40-42, p7681 

    The aim of this study was to investigate the removal of bacteria (Escherichia coli) in flowthrough columns (length = 10 cm; inner diameter = 2.5 cm) containing converter furnace steel slag and quartz sand. The X-ray fluorescence (XRF) analysis shows that calcium (Ca) and iron (Fe) were the major...

  • Enrichment Mechanism of Phosphate in CaO-SiO-FeO-FeO-POSteelmaking Slags. Li, Jin-yan; Zhang, Mei; Guo, Min; Yang, Xue-Min // Metallurgical & Materials Transactions. Part B;Oct2014, Vol. 45 Issue 5, p1666 

    The phosphate-enrichment behavior has experimentally been investigated in CaO-SiO-FeO-FeO-POsteelmaking slags. The reaction ability of structural units in the slags has been represented the mass action concentration $$ N_{i} $$ from the developed ion and molecule coexistence theory (IMCT)- $$...

  • Propagation of the threatened staghorn coral Acropora cervicornis: methods to minimize the impacts of fragment collection and maximize production. Lirman, D.; Thyberg, T.; Herlan, J.; Hill, C.; Young-Lahiff, C.; Schopmeyer, S.; Huntington, B.; Santos, R.; Drury, C. // Coral Reefs;Sep2010, Vol. 29 Issue 3, p729 

    Coral reef restoration methods such as coral gardening are becoming increasingly considered as viable options to mitigate reef degradation and enhance recovery of depleted coral populations. In this study, we describe several aspects of the coral gardening approach that demonstrate this...

  • Sequence of Solid-State Transformations during Heat Treatment of CaCO3 + CaHPO4 Mixtures. Samuskevich, V. V.; Belous, N. Kh.; Samuskevich, L. N. // Inorganic Materials;May2003, Vol. 39 Issue 5, p520 

    It is shown that both isothermal and nonisothermal heat treatments of an equimolar mixture of anhydrous calcium monohydrogen phosphate and calcium carbonate lead to decomposition of these compounds to calcium pyrophosphate and calcium oxide, respectively. Above 880°C, these intermediates...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics