The present study is aimed to determine heavy metal concentration in Benut River, Simpang Renggam, Johor. Heavy metals such as copper (Cu), zinc (Zn), cadmium (Cd), manganese (Mn), aluminum (Al), nickel (Ni), chromium (Cr) and Arsenic (As) were selected for the water quality assessment due to the potential sources from natural and anthropogenic sources at the case study. Sampling was conducted twice which was on April 2019 and July 2019 at eight (8) sampling points in Benut River. Eight (8) sampling points were chosen due high potential of pollutant at point sources include chicken farm, landfill, oil palm plantation and residential. Heavy metals were analysed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) followed the APHA (2012) standard. It can be concluded the Cu, Zn, Cd, Mn, Ni, Cr, As and Al are detected at Benut River and most of the heavy metals are within allowable standard by INWQS Class II and DWQS except for Al concentration. Therefore, concentration of heavy metals is low in Benut River for both sampling. However, continuous monitoring is needed to maintain the quality of Benut River and advance treatment could apply to the water treatment facility for this river water for household purpose.
Soil stabilization is a method to improve the weakness of fabric peat soil structure which is a result of larger particle size pore. Therefore, the fabric peat soil is solidified using mixture of cement, fly ash and bottom. The present study aimed to investigate a physical simulation of soil column model as a response for affecting the wet and dry seasons and fertilizer on the solidified fabric peat soil. The column mode was investigated by analysis the water leaching micronutrient using atomic adsorption spectroscopy (AAS). The results revealed that the nitrate has the highest concentration (35.55 mg/L) on Run 3 (Fibric, rainwater, solidified peat and fertilizer) at upper area in the dry season. In comparison, potassium (K) recorded the lowest concentrations (1.14 mg / L) on Run 2 (fibric, rainwater and fertilizer) at upper area in the wet season. The highest (22.92 mg/L) and lowest (0.10 mg/L) calcium was recorded on Run 3 and Run 2 with both at upper area in wet season. These findings indicated that the chemical binder used as stabilization soil influenced the nutrient quality especially calcium which is one of the major compound materials in cement.
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