Amir Alansari

Amir Alansari
University of North Carolina at Charlotte | UNC Charlotte · Department of Civil and Environmental Engineering

About

14
Publications
1,078
Reads
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72
Citations
Citations since 2016
12 Research Items
70 Citations
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201620172018201920202021202205101520
Introduction
Amir Alansari currently works at the Department of Civil and Environmental Engineering, University of North Carolina at Charlotte. Their current project is 'Develop a practical and "universal" model for coagulation'.

Publications

Publications (14)
Article
The specific focus of this study was on the effects of flocculation duration, intensity, and scheme (i.e., single or multistage) on floc formation (time and size) and treated turbidity (settled and filtered). The results showed that floc formation times were 2–8 times longer under charge neutralization conditions compared with sweep flocculation co...
Presentation
This presentation will demonstrate a next-generation jar test procedure which uses a single-variable optimization approach along with a granular media filtration system to optimize coagulation conditions (i.e. dose and pH). The role of mixing in the coagulation and flocculation processes under different coagulation mechanisms will be discussed. The...
Article
The electrophoretic mobilities (EPM’s) of fifteen different microbes (6 viruses, 5 vegetative bacteria, 2 bacterial endospores, 2 protozoa) and one microbial particle surrogate (Polystyrene microspheres) were measured, and five models were used to convert EPM's of these microorganisms to zeta potentials. The Helmholtz-Smoluchowski, Hückel-Onsager,...
Poster
Full-text available
Jar testing is a reliable tool for optimizing coagulation conditions (i.e. dose and pH) in drinking water treatment. Optimizing coagulation conditions through settling, as is the case with most conventional jar test or plant-scale optimization procedures, typically leads to overdosing chemicals. Our next-generation jar test procedure uses a single-...
Article
The present work investigated the removal behavior of phenanthrene (PHE) by nano zero-valent iron immobilized on alkali modified biochar (nZVI/MB). Batch studies showed that nZVI/MB enhanced PHE removal by 4.9 times that of the nZVI and 1.2 times that of modified biochar (MB) alone, due to greater surface area and the inhibited aggregation of nZVI...
Article
The primary objective of this study was to conduct a quantitative analysis of the hydraulic efficiency of a 1:25 bench-scale swimming pool and to determine whether the recirculation efficiency could be increased by modifying parameters such as turnover rate, inlet/out configuration, and extent of mixing within the pool. Salt tracer studies were con...
Article
The goal of this study was to investigate the removal of organics and disinfection by-product (DBP) precursors in an optimized pilot-scale hybrid coagulation-ceramic membrane system treating two surface waters with low specific ultraviolet values (SUVA254 < 3 L/mg-m). The average removal of dissolved organic carbon was 30% with coagulation pretreat...
Article
A case study was conducted to evaluate the seasonal performance of conventional and phosphate-amended biologically active filtration (BAF). Performance was evaluated in terms of general water quality parameters, disinfection by-product (DBP) precursors, and operational parameters. BAF successfully reduced dissolved organic carbon and dissolved orga...
Article
Full-text available
As human health concerns over disinfection byproducts (DBP) in drinking water increase, so does the need to development new materials that remove them rapidly and at high-capacity. Ion exchange (IEX) is an effective method for the removal of natural organic matter (NOM), especially anion exchange resins (AERs) with quaternary ammonium functional gr...
Article
The goal of this project was to identify optimal coagulation pretreatment conditions and cleaning protocols in a pilot-scale ceramic membrane system. A matrix of coagulation conditions (coagulant dose and pH) was investigated using aluminum sulfate and ferric chloride at two source waters (river and lake). Increasing backwash frequency to every 30...
Article
The goal of this project was to identify optimal coagulation pretreatment conditions and cleaning protocols in a pilot-scale ceramic membrane system. A matrix of coagulation conditions (coagulant dose and pH) was investigated using aluminum sulfate and ferric chloride at two source waters (river and lake). Increasing backwash frequency to every 30...

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Projects

Project (1)
Project
1) Investigate the main factors (type and concentration of contaminants (particles and organics), pH, coagulant dose, alkalinity, and mixing) that control the optimal coagulant dose for the removals of particles and organics 2) Develop a practical model for optimum coagulation zones 3) Develop an efficient jar test protocol