Building a knowledge based society with engineering & technology

Abdul Latiff, Ab. Aziz and Abd. Karim, Ahmad Tarmizi and Ridzuan, Mohd Baharudin (2005) Building a knowledge based society with engineering & technology. In: Brunei international Conference on Engineering and Technology 20Q5 (BICET 2005), Brunei.

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Abstract

Treatment and disposal of domestic sludge have been problematic due to the presence of heavy metals. The application of sludge to agriculture land is considered as a feasible method of disposal. 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 this research are to determine the heavy metals content in domestic sludge from various treatment processes and the effect of the sludge application to soil. This sludge were then applied to soil by surface spraying to application cells of 0.091 m2 at different application rates of 0 C/m2, 2 €/m2, 4 i/m , 6 i/m2, 8 £/m2 and 10 Vm2. These cells were then planted with two different types of plants, brassica juncea and ipomoea aquatica, and were placed in the open with a transparent roof to simulate the natural environment while allowing control of soil moisture at 60 %. Samples taken from roots, stems and leaves were separately analyzed for heavy metal absorption by the plants. Analyses were conducted using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The results showed that the metal content of treated sludge is still below the permitted level for application to agricultural land as indicated by USEPA, Part 503 regulations. Higher concentrations of metals were found in the roots compared to the other parts of plants. The study of uptake of metals by the plants at various rates of sludge application shows that the relationships between the parameters studied are polynomial. In general, the use of plants has helped in reducing metal content both in the sludge and agricultural land under study.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA1-163 Engineering (General). Civil engineering (General)
Divisions:Faculty of Civil and Environmental Engineering > Department of Water and Environment Engineering
ID Code:1863
Deposited By:Mrs Hasliza Hamdan
Deposited On:04 Oct 2011 11:49
Last Modified:04 Oct 2011 11:49

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