Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Hydrophobic sand to combat water scarcity – Properties and possible chemical risk.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The city of Dubai, which lies in the Middle East is, as many other cities in the area, suffering from shortage of fresh water resources. This issue is handled by desalination of sea water, which is a rather expensive procedure. Recently, the city tends to promote using hydrophobic sand in order to reduce irrigation water quantity and watering durations. Economically, this procedure has fewer costs than water desalination but concerns were raised regarding whether the chemical compounds, used in the treatment process of normal sand, impose any contamination risks for soil and groundwater.

Due to the fact that normal sand has high permeability comparing to other types of soil, such as silt and clay, the rates of water seepage in normal sand is considerably high which results high water consumption in agriculture. One of the objectives of this thesis is to identify the most effective design for utilizing hydrophobic sand and normal sand layers to obtain the most suitable permeability rates for plantation purposes. Another objective is to discuss the probability of organic chemicals and heavy metals seepage when using the hydrophobic sand in soil; leaching tests were carried out to provide input to this discussion. The study showed that the hydrophobic sand has higher permeability than normal sand when it is saturated with water. However, it needs a considerably longer time in order to reach the saturation stage so recommendations were provided to use a separate layer of hydrophobic sand beneath the normal sand layer where vegetation is planted and avoid using sand mixtures.

Based on the leaching tests’ results, it was also concluded that negligible concentrations of the organic silica compounds will be released into soil and ground water and the rates of heavy metals in leaching water were within the allowable limits. However, the possibility of the transformation of the organic compounds, used for normal sand treatment, into silica-free organic compounds was not discussed in this thesis. In other words, the usage of hydrophobic sand for agriculture purposes does not threaten the safety of neither soil nor groundwater concerning the leaching of the chemical compounds and metals that were tested in this study.

Place, publisher, year, edition, pages
2015.
Series
TRITA-LWR Degree Project, ISSN 1651-064X ; 2015:14
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-170466OAI: oai:DiVA.org:kth-170466DiVA: diva2:838504
Educational program
Degree of Master - Environmental Engineering and Sustainable Infrastructure
Examiners
Available from: 2015-09-21 Created: 2015-06-30 Last updated: 2015-09-21Bibliographically approved

Open Access in DiVA

fulltext(1020 kB)791 downloads
File information
File name FULLTEXT01.pdfFile size 1020 kBChecksum SHA-512
e3bb760918aea275ba7401d80361b0b2c09ca7f73e5092163f4c81f1d91ce0560a61ab5d32a04c47edcbe0a359903a6da16684cbfbbeddaaf2e5e0de713fd039
Type fulltextMimetype application/pdf

By organisation
Land and Water Resources Engineering
Civil Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 791 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 190 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf