Immobilization of water filtration sludge using SLS commercial waste glass thereof generating glass foam for the development of value-added products

Group members:

• Biplab Das(10CC23J09002)
• Ajay Kumar Rajak(10CC23J09001)
• SK Hasanur Rahaman(10BB23A09001)
• Nelson Kandulna(20EE23A09002)

AcSIR Societal Programme, 2024

CSIR-Central Glass and Ceramic Research Institute, Kolkata

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SOCIETAL PROBLEM

Utilize unused commercial waste glass in different forms.

Area-1

Area-2

Ground water contamination with arsenic is a serious problem in several districts of West Bengal. Although the effective removal of Arsenic has reached in pilot scale, the

management of arsenic contaminated water filtration sludge is a concern for the environment.

The sludge is mainly composed of iron oxide; the potential toxic component arsenic present in trace

Car windshield glass waste

Waste glass sheet

Unused fluorescence tube

Arsenic toxicity

Toxic Sludge

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FORMULATED HYPOTHESIS

Role of Iron oxide in alkali silicate glass

• Iron is usually found in the natural silicate glasses/ basaltic glasses which are highly chemically durable.

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• Fe³⁺ behaves as a glass former in tetra coordination eventually enhancing the polymerization.

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• Arsenic as a refining agent in glass melting

These information could be useful to immobilized iron oxide rich arsenic contaminated sludge in commercial silicate glasses

1. F. Farges et al. J. Non. Cryst. Solids 344 (2004) 176–188

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Commercial waste glasses

Arsenic contaminated iron oxide sludge

Fe³⁺ in Fe₂O₃ via sludge immobilization

Iron doped SLS glass

Cullet melting

Permit the toxicity level of As

Optimized iron doped SLS glass

Glass foam

SOLUTION ROAD MAP

Source: excelsiorceramics.com

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POTENTIAL APPLICATIONS

• lower amount of sludge incorporated glasses after toxicologic test will be used for glass foam fabrication for thermal insulation purpose

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Waste Derived Glass Foam

Material for fireproofing

Green material for Tin shade insulation

Meet the Societal needs with waste utilization-immobilization approach

Photo sources: electrical-forensics.com

m.indiamart.com

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Thank You