Yves Iradukunda obtained his BSc degree in Applied Chemistry [Environmental Chemistry Option] in 2015 from the University of Rwanda [College of Science and Technology]. From 2018, He is doing a research master's in Environmental Engineering, Lanzhou University of Technology, China. Indeed, he is currently working as a UN Volunteer in the Environmental department. Supervisors: Professor Guoying Wang and Dr. UWAMUNGU Jean Yves Phone: +8618298314772 Address: 730050
Journal of Materials Science: Materials in Electronics
Porous activated carbon materials are extensively used as adsorbent electrode materials for energ... more Porous activated carbon materials are extensively used as adsorbent electrode materials for energy storage devices because of their impressive superlative characteristics, such as large specific surface area, high electrical conductivity and low cost. In this work, Hierarchical porous carbon and nickel oxide nanocomposites modified by gold nanoparticles (AuNP@C@NiO-x) were synthesized through in-situ reduction methods and used as high-performance electrode material supercapacitors. The obtained nanocomposites material consisted of NiO, AuNPs nanoparticles on the surface of activated carbon material, in which the activated carbon was used as a hollow structure to attachment of NiO and AuNPs nanoparticles. The electrochemical analysis demonstrated that the AuNP@C@NiO-x composite electrode significantly improved electrochemical performance compared to the activated carbon and pristine NiO. The result shows that the AuNP@PC@NiO-x composites have the highest specific capacitance of 485.7 F/g at the current density of 1.0 A/g and lower charge-transfer resistance than pure NiO. Furthermore, the assembled asymmetric device (AuNP@PC@NiO-0.15/AC) demonstrated a maximum energy density of 19.22 Wh/kg at a power density of 175.2 W/kg and a better specific capacity retain of 84.2% at a current density of 1.0 A/g after 5000 cycles.
The chemical coagulation-flocculation technology is touted as one of the valuable techniques and ... more The chemical coagulation-flocculation technology is touted as one of the valuable techniques and widely used for wastewater treatment because of its simplicity and effectiveness. So far, a number of flocculants have been fabricated to ameliorate the flocculation process in water treatment such as alum, polyaluminium chloride. Despite its broad application in water treatment, accumulation of alum in sludge has been reported as the main source of a disposal problem. Furthermore, recent studies suggested that the presence of alum in sludge may lead to human health problems. Here in, we have used alkalization method to recover alum present in sludge collected from Kimisagara water treatment plant located in Kigali capital city of Rwanda. The recovered alum was used more than one time and showed excellent flocculation efficiency. Some physical parameters such as pH, Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Conductivity and Turbidity were systematically tested and compared with those of World Health Organization (WHO) and Rwanda Standards Board (RSB) standards for drinking water. The results showed that alum present in sludge can be recovered and reused for multiple times.
Journal of Materials Science: Materials in Electronics
Porous activated carbon materials are extensively used as adsorbent electrode materials for energ... more Porous activated carbon materials are extensively used as adsorbent electrode materials for energy storage devices because of their impressive superlative characteristics, such as large specific surface area, high electrical conductivity and low cost. In this work, Hierarchical porous carbon and nickel oxide nanocomposites modified by gold nanoparticles (AuNP@C@NiO-x) were synthesized through in-situ reduction methods and used as high-performance electrode material supercapacitors. The obtained nanocomposites material consisted of NiO, AuNPs nanoparticles on the surface of activated carbon material, in which the activated carbon was used as a hollow structure to attachment of NiO and AuNPs nanoparticles. The electrochemical analysis demonstrated that the AuNP@C@NiO-x composite electrode significantly improved electrochemical performance compared to the activated carbon and pristine NiO. The result shows that the AuNP@PC@NiO-x composites have the highest specific capacitance of 485.7 F/g at the current density of 1.0 A/g and lower charge-transfer resistance than pure NiO. Furthermore, the assembled asymmetric device (AuNP@PC@NiO-0.15/AC) demonstrated a maximum energy density of 19.22 Wh/kg at a power density of 175.2 W/kg and a better specific capacity retain of 84.2% at a current density of 1.0 A/g after 5000 cycles.
The chemical coagulation-flocculation technology is touted as one of the valuable techniques and ... more The chemical coagulation-flocculation technology is touted as one of the valuable techniques and widely used for wastewater treatment because of its simplicity and effectiveness. So far, a number of flocculants have been fabricated to ameliorate the flocculation process in water treatment such as alum, polyaluminium chloride. Despite its broad application in water treatment, accumulation of alum in sludge has been reported as the main source of a disposal problem. Furthermore, recent studies suggested that the presence of alum in sludge may lead to human health problems. Here in, we have used alkalization method to recover alum present in sludge collected from Kimisagara water treatment plant located in Kigali capital city of Rwanda. The recovered alum was used more than one time and showed excellent flocculation efficiency. Some physical parameters such as pH, Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Conductivity and Turbidity were systematically tested and compared with those of World Health Organization (WHO) and Rwanda Standards Board (RSB) standards for drinking water. The results showed that alum present in sludge can be recovered and reused for multiple times.
Uploads
Papers by Yves Iradukunda