Toxicity Leaching Characteristic of Arsenic (As) and Cadmium (Cd) Contaminated Soil Stabilised by Cement and Bagasse Ash

Authors

  • Mohamad Azim Mohammad Azmi , Saiful Azhar Ahmad Tajudin , Shahiron Shahidan , Anis Ayuni Suied , Mardiha Mokhtar , Nor Baizura Hamid , Sharifah Salwa Mohd Zuki

Abstract

The effectiveness of contaminated soil remediation technology is generally investigated based on heavy metal
leachability in different leaching test procedures. The leaching data collected through laboratory leaching tests
could help simulate the behaviour of waste under ideal, static or worst-case field conditions. The objective of this
study is to investigate the toxicity leaching characteristic of arsenic (As) and Cadmium (Cd) of contaminated soil
when stabilised with cement and bagasse ash.Toxicity Characteristic Leaching Procedure (TCLP) were employed to
measure the leaching performance of stabilised soil samples. The experimental results demonstrated that the
concentration of As and Cd in the leachates was within the limits specified by US EPA and Syarikat Kualiti Alam
SdnBhd, Malaysia as low as 0.84 mg/L and 0.67 mg/L respectively. Based on the result, it can be concluded that the
use of high percentages of OPC up to 20% and a mixture of cement and BA (10% OPC + 10% BA) has successful in
complying the maximum limit for the TCLP test.

Published

2020-03-31

Issue

Section

Articles