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Banan och bomullsgräs som vattenrenare: Undersökning av förmågan att adsorbera koppar och nickel
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Banana and cogongrass as water purifier : A study of adsorption of copper and nickel (English)
Abstract [sv]

Detta arbete har undersökt banans (Musa paradisiaca) och bomullsgräs (Imperata cylindrica) förmåga att adsorbera koppar och nickel, samt konkurrensen mellan dessa metaller. Syftet med detta är att bidra till möjligheterna att utveckla billig och resurseffektiv teknik för rening av metallkontaminerat vatten i Uganda. Arbetet har utgjorts av en laborationsstudie, en litteraturstudie av kunskapsläget på samma ämne, samt även en diskussion förankrad i teori om hållbar utveckling. Laborationsresultaten visade att i en lösning där koncentrationen av kopparjoner dominerar, verkar banan vara en bättre adsorbent. När kopparjonerna får konkurrens i form av nickeljoner i samma koncentration, verkar bomullsgräs vara ett bättre alternativ. Vid jämförelse av kunskapsläget kunde konstateras att metallkoncentrationen är en starkare drivande faktor än biomassakoncentrationen vad gäller adsorptionen av koppar och nickel. Kunskapsläget skiljde också sig på en punkt jämfört med vårt arbete; banans förmåga att adsorbera nickel och koppar i binär lösning. Vår studie visar att koppar adsorberas mest, kunskapsläget det omvända. Utifrån teori om hållbar utveckling har arbetet identifierats befinna sig närmare vidare forskning inom en miljömässig dimension, än faktisk implementering i samhället. Detta eftersom utformandet, konstruerandet och användandet av reningsteknik innebär mer komplexa system; det är inte avgränsat till vår studerade teknik, nämligen rening genom adsorption.

Abstract [en]

This project has investigated the capability of banana (Musa paradisiaca) and cogongrass (Imperata cylindrica) to adsorb copper and nickel, and the concurrence between these two metals. The overall purpose was to contribute to the possibilities of developing affordable and resource effective technology for metal contaminated water in Uganda. The project included a laboratory study, a literature study regarding the contemporary state of knowledge, and eventually a discussion anchored in theory of sustainable development. The laboratory results showed that in a solution where the concentration of copper ions dominates, banana seems to be a better adsorbent. When the copper ions get concurrence from nickel ions, the cogongrass seems to be a better alternative. A comparison of the state of knowledge, showed that the metal concentration is a stronger driving force than the biomass concentration in the adsorption of copper and nickel. Compared to our study, the state of knowledge differed in one aspect; the capability of banana to adsorb nickel and copper in a binary solution. Our study showed that copper was adsorbed to the largest extent, the state of knowledge the contrary. Based on theory of sustainable development the project has been identified as being closer related to further research with an environmental focus, rather than actual implementation in society. This is because the formation, construction and usage of purification technology are all associated with more complex systems; they are not limited to the main technology of our study, namely purification by adsorption.

Place, publisher, year, edition, pages
2016.
Series
, TRITA-IM-KAND 2016:11
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-192304OAI: oai:DiVA.org:kth-192304DiVA: diva2:967571
Available from: 2016-09-20 Created: 2016-09-09 Last updated: 2016-09-20Bibliographically approved

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