Page 11 - tech fest 2025 ב״ש חוברת תקצירים

Book of Abstracts | 2025 Prevention of Bromate Formation: Process Improvement and Input Savings
ChE-A-03
Daniela Sverdlov; daniellasver@gmail.com
Advisors: Prof. Adi Wolfson1, Ms. Orly Asulin2 1SCE - Shamoon College of Engineering, Be’er-Sheva 2Dead Sea Magnesium [DSM]
Bromate (BrO3-) is a strong oxidizing agent used in chemical industries, laboratories and baking processes. In the Dead Sea Magnesium plant, bromate is generated during gas treatment processes and is neutralized using a sulfur solution. The goal of this project is to optimize the bromate neutralization process using sulfur solution, while reducing raw material consumption and enhancing process efficiency, to comply with environmental regulations and lower operational costs. To determine the optimal process conditions, key parameters, such as sulfur solution concentration, flow rate and pH levels were evaluated based on post-neutralization bromate concentrations to a𝑚𝑚c3hieve optimal neutralization efficiency. The findings indicate that the optimal conditions for brhomate
neutralization are a sulfur solution concentration of 12 %wt., pH=8, and a gas flow rate of 0.5 .
Keywords: bromate, environmental regulations, gas treatment processes, sulfur solution
Quantification and Detection of Heavy Metals using Electrochemical Sensors Based on Coatings (1,8-DAN) 1,8-Diaminonaphthalene and D-Penicillamine (D-PA) ChE-A-04
Yahel Ben-Simhon; yahelbs1108@gmail.com
Advisors: Prof. Ariela Burg1, Ms. Ron Peretz1 1SCE - Shamoon College of Engineering, Be’er-Sheva
Water is essential for life and access to clean water is essential for ecosystems and human well-being. Heavy metal pollution poses a significant challenge, requiring early monitoring. This project proposes to detect cadmium, lead and copper in water using ink-coated electrochemical sensors. Electrodes were coated with two different ink mixtures, each with a different ligand—1,8-Diaminonaphthalene or D-penicillamine, which bind to metals differently. The resulting limits of detection (LoD) are 0.382 ppb for cadmium and 0.498 ppb for copper with D-PA, while 1,8-DAN demonstrated sensitive detection for lead, with a LoD of 0.142 ppb. Both methods meet the regulatory standards for the maximum allowable concentrations at: 5.00 ppb for cadmium; 10.0 ppb for lead; and 1400 ppb for copper.
Keywords: 1,8-DAN, coatings, D-penicillamine, DPN, electrochemical sensors, heavy metals, LoD
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