Leachate treatment by floating plants in constructed wetland

Leachate generation was one of the major concerns of a landfill. Leachate contained high levels of organic and inorganic matters. As the landfill leachate was highly contaminated, leachate could not be discharged directly into the surface water bodies. Therefore, leachate treatment was essential bef...

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Main Author:	Thian, Siaw Hui
Format:	Thesis
Language:	English
Published:	2005
Subjects:	GE Environmental Sciences
Online Access:	http://eprints.utm.my/id/eprint/5348/1/ThianSiawHuiMFKA2005.pdf
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id	my-utm-ep.5348
record_format	uketd_dc
spelling	my-utm-ep.53482018-03-07T20:58:30Z Leachate treatment by floating plants in constructed wetland 2005-11 Thian, Siaw Hui GE Environmental Sciences TA Engineering (General). Civil engineering (General) Leachate generation was one of the major concerns of a landfill. Leachate contained high levels of organic and inorganic matters. As the landfill leachate was highly contaminated, leachate could not be discharged directly into the surface water bodies. Therefore, leachate treatment was essential before it was discharged into receiving water. Constructed wetland emerged as one of the potential treatment alternative that employed floating plants to remove pollutants form leachate. In this research, a constructed wetland was developed by using Eichhornia crassipes to treat landfill leachate. Different leachate concentration (100%, 50%, 25%) was studied in the constructed wetland to compare the treatment efficiency in terms of pollutants removal in leachate and the heavy metal uptake by Eicchornia crassipes. The treated leachate was analyzed for nutrient and heavy metal removal. The growth of Eichhornia crassipes was observed and the plants were digested at the end of experiment to study the heavy metal uptake by plant. The results showed that the wetland with 100% leachate concentration was the most efficient in removing BOD (74.04%) and Fe (100%) while wetland of 50% leachate concentration was the most efficient in removing NO3 --N (64.51%) and Mn (53.13%) compared to 25% wetland. The higher the concentration of leachate, the more the plants wilt and this resulted in less accumulation of heavy metal in plants. Eichhornia crassipes had a higher capacity to accumulate Fe and Mn in the roots than in the leaves. At the end of experiments, the pH of the leachate decreased in all wetland regardless of the leachate concentration. pH decrease was due to heavy metal uptake by plants and nitrification process by microorganisms. As a conclusion, this study showed that wetland was efficient in removing BOD and NO3 --N in high leachate concentration. The wetland also posed a great role in removing Fe and Mn through plant uptake. 2005-11 Thesis http://eprints.utm.my/id/eprint/5348/ http://eprints.utm.my/id/eprint/5348/1/ThianSiawHuiMFKA2005.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	GE Environmental Sciences GE Environmental Sciences
spellingShingle	GE Environmental Sciences GE Environmental Sciences Thian, Siaw Hui Leachate treatment by floating plants in constructed wetland
description	Leachate generation was one of the major concerns of a landfill. Leachate contained high levels of organic and inorganic matters. As the landfill leachate was highly contaminated, leachate could not be discharged directly into the surface water bodies. Therefore, leachate treatment was essential before it was discharged into receiving water. Constructed wetland emerged as one of the potential treatment alternative that employed floating plants to remove pollutants form leachate. In this research, a constructed wetland was developed by using Eichhornia crassipes to treat landfill leachate. Different leachate concentration (100%, 50%, 25%) was studied in the constructed wetland to compare the treatment efficiency in terms of pollutants removal in leachate and the heavy metal uptake by Eicchornia crassipes. The treated leachate was analyzed for nutrient and heavy metal removal. The growth of Eichhornia crassipes was observed and the plants were digested at the end of experiment to study the heavy metal uptake by plant. The results showed that the wetland with 100% leachate concentration was the most efficient in removing BOD (74.04%) and Fe (100%) while wetland of 50% leachate concentration was the most efficient in removing NO3 --N (64.51%) and Mn (53.13%) compared to 25% wetland. The higher the concentration of leachate, the more the plants wilt and this resulted in less accumulation of heavy metal in plants. Eichhornia crassipes had a higher capacity to accumulate Fe and Mn in the roots than in the leaves. At the end of experiments, the pH of the leachate decreased in all wetland regardless of the leachate concentration. pH decrease was due to heavy metal uptake by plants and nitrification process by microorganisms. As a conclusion, this study showed that wetland was efficient in removing BOD and NO3 --N in high leachate concentration. The wetland also posed a great role in removing Fe and Mn through plant uptake.
format	Thesis
qualification_level	Master's degree
author	Thian, Siaw Hui
author_facet	Thian, Siaw Hui
author_sort	Thian, Siaw Hui
title	Leachate treatment by floating plants in constructed wetland
title_short	Leachate treatment by floating plants in constructed wetland
title_full	Leachate treatment by floating plants in constructed wetland
title_fullStr	Leachate treatment by floating plants in constructed wetland
title_full_unstemmed	Leachate treatment by floating plants in constructed wetland
title_sort	leachate treatment by floating plants in constructed wetland
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2005
url	http://eprints.utm.my/id/eprint/5348/1/ThianSiawHuiMFKA2005.pdf
_version_	1747814585691275264

Leachate treatment by floating plants in constructed wetland

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