Pengolahan kandungan logam berat daripada tanah yang diaplikasi dengan enapcemar domestik melalui kaedah tanah pertanian

Ridzuan, Mohd Baharudin (2005) Pengolahan kandungan logam berat daripada tanah yang diaplikasi dengan enapcemar domestik melalui kaedah tanah pertanian. Masters thesis, Kolej Universiti Teknologi Tun Hussien Onn.

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Abstract

Treatment and disposal of domestic sludge have been problematic due to the presence of heavy metals. One of an efficient method is the application of the sludge to an agriculture land. Several factors that attributed to the feasibility of this method include the nutrient content of domestic sludge necessary for plant growth, low handling costs and promotion of recycling. The objectives of the research are to determine the heavy metals content in domestic sludge and the effect of the sludge application to agricultural land. This study was focused on domestic sludge from four types of sewage treatment plants, namely activated sludge, oxidation pond, and aerated lagoon and community septic tank. This sludge were then applied to agricultural land by surface spraying to application cells of 0.091 m2 area at different application rates of 0 £1m2 , 2 £1m2 , 4 £/m2 , 6 £1m2 , 8 £1m2 and 10 £1m2 • These cells were then planted with three different types of plants, ipomoea aquatica, spinacia oleracea and brassica juncea and were placed in the open with a transparent roof to simulate the natural environment while allowing control of soil moisture at 60 %. Three different cross sections such as roots, stems and leaves were separately analyzed for heavy metal absorption by the plants. Analysis were conducted using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) showed that these domestic sludge contain aluminium (AI), cadmium (Cd), chromium (Cr), copper (Cu), iron (Fe), lead (Pb), nickel (Ni), manganese (Mn), and zinc (Zn). The study of uptake of metals by the plants at various rates of sludge application showed that the relationships between the parameters studied are polynomial. Higher concentrations of metals were found in the roots compared to the other parts of plants. In general, this study has succeeded in determining heavy metal contents of domestic sludge from several treatment sources. The use of plants has helped in reducing metal content both in the sludge and agricultural land under study.

Item Type:Thesis (Masters)
Subjects:T Technology > TD Environmental technology. Sanitary engineering > TD511-780 Sewage collection and disposal systems. Sewerage
ID Code:1532
Deposited By:Faizul Sahari
Deposited On:20 Apr 2011 16:20
Last Modified:29 Apr 2011 14:44

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