School of Environmental Engineering (FYP)http://dspace.unimap.edu.my:80/xmlui/handle/123456789/192952024-03-29T08:48:08Z2024-03-29T08:48:08ZComparison of nickel and methylene blue removal efficiency using mango seed kernel powderThinakaran, Subramaniamhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/780862023-03-07T07:21:18Z2011-05-01T00:00:00ZComparison of nickel and methylene blue removal efficiency using mango seed kernel powder
Thinakaran, Subramaniam
Biosorption has emerged as a new technology compared to conventional method
like chemical precipitation for removal metal and dye from aqueous solution. In this
present study, dried Mango Seed Kernel Powder (MSKP) was used as a biosorbent for
Nickel (Ni) and Methylene Blue (MB) removal from aqueous solution. The removal
characteristics of Ni and MB by dried MSKP were evaluated as a function of contact time,
pH and initial adsorbate concentration. The studied is to develop adsorption equilibrium for
determine the adsorption capacity and analyze the suitability of the adsorption process. The
percent Ni uptake was analyzed by using Atomic Absorption Spectrophotometer (AAS),
while MB uptake was analyzed with UV VIS spectrophotometer. At optimal conditions, Ni
and MB uptake increased when contact time increased until reach the equilibrium. This
research study was carried out at room temperature with the constant dosage of 0.5g
MSKP. The maximum removal successfully obtained by MSKP at equilibrium time was
just 20% for Ni from 45 up to 150 minutes and 90% for MB at 180 up to 300 minutes.
Removal of Ni and MB using dried MSKP only dependent on the concentration and contact
time. The pH analysis was done to determine the characteristic of ion of the substances.
The adsorption equilibrium study analysis describe that the adsorption data were better
represented by Langmuir model than Freundlich model. It also showed that the adsorption
process was suitable and adsorption capacity for Ni was 23.31 mg/g, and for MB was
37.31mg/g. Result indicates that dried MSKP is more efficient for the removal of MB
compare to Ni from aqueous solution.
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2011-05-01T00:00:00ZA review of aromatic hydrocarbon in ambient air in urban citiesNor Hazliza, Abdullahhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/779172023-02-23T00:30:34Z2012-05-01T00:00:00ZA review of aromatic hydrocarbon in ambient air in urban cities
Nor Hazliza, Abdullah
The objectives of this study is to identify the concentration of benzene, toluene,
ethylbenzene and xylene in the atmospheric environment of several urban cities using
published literature data and to identify the potential health effect to human associated with
the exposure level using published literature data. The data was collected from journal in
order to identify/evaluate the trend and distribution based on the concentration of this
compound. Identify the BTEX concentration is important because they can cause
significant risk to human health. Benzene is a known carcinogen to human health.
Meanwhile, toluene may affect the reproductive and central nervous systems while
ethylbenzene and xylenes may have respiratory and neurological effects. Based on the
study, benzene has higher concentration the value is 13,417 μg m-3 meanwhile the lowest
concentration is o-xylene the value is 0.21 μg m-3. The major sources of aromatic
hydrocarbon exposure are tobacco smoke, automobile service stations, exhaust from motor
vehicles, and industrial emissions. Overall result shows that, BTEX have very high
concentration in urban environment and can lead to the adverse health effect when expose
in a long time of exposure. The evaluation of risk health assessment is very important as it
is the indicator to the risk associated to the exposure and the monitoring of these
hydrocarbons and its potential human adverse effect in urban regions has become a priority.
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2012-05-01T00:00:00ZRelationship between plasticity index and compression index of soil at PerlisNor Afzan, Ariffinhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/779162023-02-22T13:01:58Z2012-05-01T00:00:00ZRelationship between plasticity index and compression index of soil at Perlis
Nor Afzan, Ariffin
Knowing the characteristics of soils is very important in preliminary stage of construction project. Comprehensive study of the soil should be done because in the geotechnical field, there are various parameters that need to know to understand the soil
behavior before the design a structure. Experiments onto the soil are divided into three categories such as the determination of the chemical, physical and mechanical properties. This research is an initiative to review the relationship between physical
properties and mechanical properties of the soil. Physical properties refer to the Atterberg Limit Test where is to determine Plasticity Index (PI). The Atterberg Limit
Test is simple and rapid test. Meanwhile mechanical properties refer to One-
Dimensional Consolidation Test (Oedometer Test) where this test is to determine
Compression Index (Cc). The Oedometer Test is a complex, time consuming and
expensive test if compared to other soil tests. This test was conducted on two different
types of soil consisting a clay and laterite where that soil is taken around the state of
Perlis. For clay, three locations involved which are Kampung Ujong Bukit, Kampung
Behor Mempelam and Kampung Behor Mali. While for laterite soil was taken at
Kampung Ulu Pauh, Kampung Kubang Perun and Kampung Kaki Bukit. For each
location, the disturbed soils samples are taken at three different points and are indicated
by P1, P2 and P3. In addition, Particle Size Distribution, Specific Gravity and pH test is
also conducted to obtain more detailed information for the soil samples. Preparation of
soil sample and the experimental procedure is based on BS1377 (1990). The results of
this study have shown that, when the value of PI increases, the Cc will also be
increased. From this research, relationship between PI and Cc is established. The Cc of
soil sample can be identified by executing the PI. There is a helpful objective in this
research which is to solve the site problem in a quick and efficient way.
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2012-05-01T00:00:00ZStudy the accumulation of nutrients and heavy metals in soil media in sub-surface flow (SSF) constructed wetlandSiti Yashidah, Mohamed Yazidhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/779152023-02-22T09:22:57Z2012-05-01T00:00:00ZStudy the accumulation of nutrients and heavy metals in soil media in sub-surface flow (SSF) constructed wetland
Siti Yashidah, Mohamed Yazid
This study focus on the accumulation of heavy metals (Fe, Zn, Mn and Ni) and nutrients
(PO4
3- and NH3-N) in the soil media of the sub surface flow constructed wetland. This study
was conducted by a lab-scale sub surface flow constructed wetland with two different
reactor namely planted and control. This system consists of a feeding tank, wetland reactor
and settling tank. The soil media comprises of soil and gravel. Wetland plant is
Limnocharis flava. The SSF reactor is arranged in series and operated with different
hydraulic loading rates (HLR) which are 0.55 m/d and 0.39 m/d for 24 hours hydraulic
retention time (HRT). The plants, leachate and media were removed and replaced with new
plants, leachate and media for each HLR. The leachate wastewater was continuously
pumped daily into SSF reactor directly from the leachate storage tank by gravity flow.
Accumulation of heavy metals and nutrients was measured at different depth of the soil
media which is top, middle and bottom. The result shows that, Fe and PO4
3- give the highest
accumulation of heavy metals and nutrients in the soil media.
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2012-05-01T00:00:00Z