Abstract

Review Article

Effect of cement solidification on strength and leaching properties of Heavy Metals Contaminated Soil

Syed Taseer Abbas Jaffar*, Sajjad Yousefi Oderji, Si-an Zhang and Long-zhu Chen

Published: 13 August, 2018 | Volume 2 - Issue 1 | Pages: 016-027

This study investigated the effect of Portland cement on stabilization of heavy metal contaminated clayey soils that may give range of geo environemntal benefits. The absolute concentration of heavy metals: Lead (Pb), Zinc (Zn), Chromium (Cr), Cadmium (Cd) and Copper (Cu) were measured using an inductively coupled plasma atomic emission spectroscopy (ICP-AES). A series of laboratory scale experiments such as unconfined compression test (UCT), pH test and synthetic precipitation leaching procedure (SPLP) were performed to study the effects of curing time and cement content on the unconfined compressive strength (UCS) and leaching characteristics of heavy metals. According to results, excessive concentration of heavy metals are present in the topsoil of Shanghai Jiao Tong University (SJTU) among which Pb, Zn and Cd were most prominent. Other test results showed that the dry density of both C4 and C8 soil samples increases with curing time. Similarly the compressive strength (qu)of C4 and C8 samples at 21 d of curing increases by 40% (113 kPa-288 kPa) and 15% (745kPa-864 kPa) respectively, as compared to the 7 d of curing. Besides, the test results showed a prominent decrease in the leached concentration of heavy metals with increasing curing time.

Read Full Article HTML DOI: 10.29328/journal.acee.1001011 Cite this Article Read Full Article PDF

Keywords:

Heavy metals; Soil pollution; Solidification; Unconfined Compressive strength

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