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• W2521582 abstract "A study of heavy metals distribution in landfill surface soil, surface water andlandfill leachate and its relations to Acacia mangium growth and macronutrientsuptake was conducted in a landfill in Kota Bharu, Kelantan. Five heavy metals,particularly Fe, Cr, Zn, Cu and Cd was analyzed in this study and results showselevated heavy metals concentration level compared to the control surface soil.The distribution of the heavy metals in the surface soil from the landfill variesthroughout the study site. The concentration decreased prominently in the riversediment adjacent to the landfill. The concentration of Fe was the highest thatranged between 1993.4 – 2404.6μg/g, followed by Zn, 18.08 – 54.10 μg/g; Cr,2.67 – 62.10 μg/g; Cu, 5.21 – 18.60 μg/g and Cd, 0.70 – 1.52 μg/g of soil dryweight. However, compared to DOE soil threshold concentration, this landfill wasonly slightly contaminated with Cd that exceeds the threshold with an average of0.94 μg/g. Heavy metals speciation by sequential extraction of landfill surfaceiisoil shows that the surface soil was not yet contaminated with heavy metals asthe anthropogenic fraction is less than 30% of the total concentration of heavymetals of the surface soil and mainly attached to the organic matter.Concentration of heavy metals in landfill leachate shows higher level than thesurface water. However, the levels of heavy metals in both water samples werestill considered as low compared to other landfills due to dilution by rain and rivernearby. Cu concentrations in water samples were generally higher than otherheavy metals that ranged between 0.03 – 6.14 mg/L whereas Cd and Cr weregenerally very low, below detectable limits. The level of accumulation in A.mangium leaves was highest for Fe that ranged between 139.5 – 537.6 μg/g,followed by Cr 45.54 – 357.3 μg/g, Zn 29.36 - 57.23μg/g, Cu 6.88 - 15.61μg/gand Cd 1.63 - 3.48μg/g. However, Fe shows no significant difference in the levelof accumulation between landfill and control plants. Heavy metals accumulationlevel in A. mangium leaves have very wide range dependent on the leavessampled. However, from the soil-plant concentration ratio, heavy metals uptakesby A. mangium in landfill site were found higher than control plants especially forCr and Cd. Generally the concentration of heavy metals was found so muchhigher in the plants tissues rather than in the landfill surface soil and landfillleachate or surface water. Relation between heavy metals accumulation in A.mangium and growth and macronutrient uptake was not demonstrated this studyas the N, P, K level in control and landfill site do not show any significantcorrelation with heavy metals concentrations. Uptakes of N and P in landfill A.mangium were found higher than control but on the contrary, K was found higheriiiin control plants. Growth of A.mangium in landfill was slightly different withcontrol plants as there are tendency of A. mangium in landfill site to producemany branches, leaves and incisive increase of trunk diameter whereas, controlplants tends to gained heights very quick. This is due to different soil type andclimatic factors influence rather than heavy metals level in the plants’ tissue. Thisstudy also proposed A. mangium is tolerant to Cd and Cr however the use of A.mangium as general bioindicator for heavy metals was not probable as only Cdand Cr was highly accumulated. A. mangium can be used for phytoremediationof low contaminated soil as shown in his study. Furthermore, landfill site is thisstudy found it suitable to be used as A. mangium culture site." @default.
• W2521582 created "2016-06-24" @default.
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• W2521582 date "2003-03-01" @default.
• W2521582 modified "2023-09-26" @default.
• W2521582 title "Heavy Metals in Surface Soils of Kota Bharu Landfill Site and its Relations to The Growth and Macronutrients Uptake of Acacia Mangium" @default.
• W2521582 hasPublicationYear "2003" @default.
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