Dr Saidur R. Chowdhury

Dr Saidur R. Chowdhury |Clyto Access

Researvh Manager, Toronto Inspection Ltd, Canada

Speaker

Expertise: Applications of Nano Particles, Recycling, Environmental Remediation

Biography:

Dr Saidur Chowdhury is currently working as an Environmental Research Manager at Toronto Inspection Ltd, a Geo-Environmental Consultants in Markham ON Canada.He has obtained his PhD in Environmental Engineering in 2013 from Civil and Environmental Engineering Department at University of Western Ontario in Canada. Dr Chowdhury have over two years of Postdoctoral experience at both Western and the Simpson Environmental Corporation in Burlington, Ontario as well as University of Saskatchewan. His field of expertise is related to iron oxides based nanoparticles and recycled waste materials for site remediation treatment. His Reasearch Interests include 1. Application of Nanomaterials for environmental remediation tecnologies, 2) Recycling waste product for Environmental Remediation; 3) The Development of reactive media for water or wastewater treatment and 4) Resource Recovery. Dr Chowdhury is also interested in studying the contaminant occurrence, fate, and transport in natural and engineered systems

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Presentation:

Title: Contaminants Removal From Water- Implication of Recycling Ni-smelter Slag for the Remediation Technology

Abstract:

The present study was an investigation into the use of recycled waste products, such as, Ni smelter slag for Arsenic (As), Chromium (Cr), Copper (Cu), Lead (Pb), Cadmium (Cd) and Zinc (Zn) adsorption from aqueous solution. The batch experimental studies were conducted to evaluate the removal efficiencies of smelter slag. The slag was characterized by surface analytical techniques. The slag contained different iron oxides and iron silicate bearing compound. In this study, the effect of pH, contact time, particle size, competition by other ions and slag dose was evaluated to measure the optimum adsorption conditions of the slag as an adsorbent for As, Cr, Cu, Pb, Cd, and Zn. The results showed 95-99% removal of As, Cr, Cu, Pb, Cd, and Zn while batch experimental studies were conducted at 7-10 mg/L of initial concentration, 10 mg/L of slag dose, 10 hours of contact time as well as 170 rpm of shaking speed and 25o C condition. The maximum removal of As, Cr Cu and Pb was achieved at pH 5 while the maximum removal of Zn was found after pH 7. The removal mechanism was specific and nonspecific adsorption. Modelling of experimental data with Visual MINTEQ revealed that saturation indices of <0 were recorded in all cases suggesting that the metals at this pH were understurated and thus in their aqueous forms. This confirms the absence of precipitation in the removal of these metals at the pHs. The experimental results also showed that Fe and Ni leaching from the slag during the adsorption process was found to be very minimal, ranging from 0.01 to 0.025 mg/L indicating the potential adsorbent in the treatment industry. The study also revealed that nickel smelter slag can be used about five times more before disposal in a landfill or as a stabilization material, for example, in road construction. The study also highlighted the feasibility of using recycled slags (e.g. an iron oxide and iron silicate bearing waste from Ni-ore smelting) in the field of remediation engineering as well as emphasized the benefits of using renewable waste products for the treatment industry.

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Related Conferences :

World Summit on Recycling and Environmental Management