Relationship of Chromium (Cr) Mobility in Soil and Ph Value Using Electrochemical Method
Relationship of Chromium (Cr) mobility in soil and pH value using Electrochemical Method
Siti Khadijah C.O. 1, Sabariah A.2, 3Zuliziana S., Jestin Jelani4, Nordila A.5
1,3,4,5 Lecturer, Civil Engineering Department, Faculty of Engineering, Universiti Pertahanan Nasional Malaysia
2 Lecturer, Faculty of Civil Engineering Universiti Teknologi Mara, Selangor, Malaysia
Email : sitikhadijah@upnm.edu.my
Abstract: Heavy metal contamination may provide a better indication of the potential risk to the human life and soil environment. This paper investigates the relationship of chromium (Cr) mobility in soil with respect to pH performance using an electrochemical method. Experiments were conducted on kaolin, which prepared as a fully saturated soil sample spiked with chromium (Cr) in 1000ppm concentration. A total of four different tests was conducted, and each of the tests is divided equally into two sample preparation. A DC power supply is used to achieve electric field strength of 5 V/cm and 10V/cm. The total duration of tests is six hours and the result was taken and recorded at every one hour. The pH value of the soil significantly affects the mobility of heavy metal ions. The mobility of chromium (III) in the soil using the electrochemical method was achieved by considering changes of pH values during experimental works. The pH values are slightly increased at the initial experiment, but then started to decrease after four hours for sample preparation 1 and after three hours for sample preparation 2. The results showed that the increased experimental time induced a higher mobility of chromium in soil due to the changes in pH value.
Key Words: chromium (Cr), electrochemical method, electrolysis process, mobility, pH value
1. INTRODUCTION Heavy metals, particularly chromium, lead, nickel, cadmium, mercury, arsenic, and zinc, is a major public health concern at many contaminated sites (U.S. EPA 1995). Heavy metal contamination of soils stills
Siti Khadijah C.O. 1, Sabariah A.2, 3Zuliziana S., Jestin Jelani4, Nordila A.5
1,3,4,5 Lecturer, Civil Engineering Department, Faculty of Engineering, Universiti Pertahanan Nasional Malaysia
2 Lecturer, Faculty of Civil Engineering Universiti Teknologi Mara, Selangor, Malaysia
Email : sitikhadijah@upnm.edu.my
Abstract: Heavy metal contamination may provide a better indication of the potential risk to the human life and soil environment. This paper investigates the relationship of chromium (Cr) mobility in soil with respect to pH performance using an electrochemical method. Experiments were conducted on kaolin, which prepared as a fully saturated soil sample spiked with chromium (Cr) in 1000ppm concentration. A total of four different tests was conducted, and each of the tests is divided equally into two sample preparation. A DC power supply is used to achieve electric field strength of 5 V/cm and 10V/cm. The total duration of tests is six hours and the result was taken and recorded at every one hour. The pH value of the soil significantly affects the mobility of heavy metal ions. The mobility of chromium (III) in the soil using the electrochemical method was achieved by considering changes of pH values during experimental works. The pH values are slightly increased at the initial experiment, but then started to decrease after four hours for sample preparation 1 and after three hours for sample preparation 2. The results showed that the increased experimental time induced a higher mobility of chromium in soil due to the changes in pH value.
Key Words: chromium (Cr), electrochemical method, electrolysis process, mobility, pH value
1. INTRODUCTION Heavy metals, particularly chromium, lead, nickel, cadmium, mercury, arsenic, and zinc, is a major public health concern at many contaminated sites (U.S. EPA 1995). Heavy metal contamination of soils stills
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