A Review of Research on the Treatment of Metallic Pollution by Using a Green Construction Material

Imad, El Fellah; Ammari, Mohammed; Laïla, Ben Allal

doi:10.1007/978-3-030-36671-1_6

Cited by 2 publications

(1 citation statement)

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“…Therefore, the removal of chromium is one of the major challenges. One of the most appropriate methods is Immobilization in binders, which is considered as an effective method that involves both physical adsorption or encapsulation and chemical bonding of the hazardous waste into cement materials, allows its conversion into stable materials [9,10].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Chromium on the Chemical and Physical Properties of Industrial Sludge Based Geopolymer

Imad¹,

Rabie²,

Asmaa³

et al. 2022

RCMA

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This paper investigates the immobilization of chromium in the industrial sludge-based geopolymer. Mechanical, physical and microstructure properties were used to characterize different samples. The results show that lower heavy metals addition has less effect on the compressive strength. However, excessive addition of Cr(VI) (1.5 and 3%) causes a deterioration of geopolymer matrix with a significant drop of the compressive strength. The compressive strength shows that the use of sodium hydroxide as an alkaline activator is not suitable for chromium immobilization. The use of 1.5 and 3% amount of chromium increases the conductivity of leachates, which explains a change in the microstructure of materials. This is in agreement with the results of compressive strength. XRD patterns of all samples show an amorphous structure with less effect of chromium on the crystalline phases. SEM of the reference sample demonstrates a dense structure of binder. However, the porosity of the matrix increases with the addition of 3% Cr(VI).

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Section: Introductionmentioning

confidence: 99%