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Browsing School of Engineering by Author "Wazne, Mahmoud"

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Acute toxicity of boron, titanium dioxide, and aluminum nanoparticles to Daphnia magna and Vibrio fischeri

Strigul, Nikolay; Vaccari, Liana; Galdun, Catherine; Wazne, Mahmoud; Liu, Xuyang; Christodoulatos, Christos; Jasinkiewiczc, Kristin (2016-02-29)

The acute toxicity of four different nanosized particulate materials (titanium dioxide, boron nanoparticles, and two types of aluminum nanoparticles (ALEX and L-ALEX)) were evaluated using two tests: the Microtox toxicity ...
Aggregation and deposition behavior of boron nanoparticles in porous media

Liu, Xuyang; Wazne, Mahmoud; Christodoulatos, Christos; Jasinkiewicz, Kristin L. (2016-03-01)

New kinds of solid fuels and propellants comprised of nanomaterials are making their way into civilian and military applications yet the impact of their release on the environment remains largely unknown. One such material ...
Aging Effects in Field-Compacted Dredged Material

Wazne, Mahmoud; Grubb, Dennis; Jagupilla, Santhi; Malasavage, Nicholas; Bradfield, William (2016-02-29)

This paper contains the results of aging study performed on 365-day-old trial highway embankments constructed of field-compacted dredged material (DM), steel slag fines (SSF), and three DM-SSF blends. Key findings include ...
Application of an empirical transport model to simulate retention of nanocrystalline titanium dioxide in sand columns

Choy, Christine Chin; Wazne, Mahmoud; Meng, Xiaoguang (2016-03-01)

Nanocrystalline titanium dioxide was injected into sand columns to simulate subsurface injection for creation of a permeable treatment barrier. Past usage of this material as an ex situ pilot scale treatment filter has ...
Assessment of aged biodegradable polymer-coated nano-zero-valent iron for degradation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)

Wazne, Mahmoud; Xiao, Ru (2016-02-29)

BACKGROUND: This study reports on the effects of aging on suspension behavior of biodegradable polymer-coated nano-zero-valent iron (nZVI) and its degradation rates of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) under ...
Assessment of brownmillerite and periclase hydration in chromite ore processing residue at elevated temperature

Wazne, Mahmoud; Moon, Deok; Dermatas, Dimitris; Sanchez, Adriana M.; Chrysochoou, Maria; Grubb, Dennis G. (ASCE, 2017-07-26)

Chromite ore processing residue (COPR) is a solid waste that was generated by the high temperature process of chromium extraction from chromite ore using soda ash and lime. The purpose of this study was to evaluate whether ...
Assessment of calcium polysulfide for the remediation of hexavalent chromium in chromite ore processing residue (COPR)

Wazne, Mahmoud; Jagupilla, Santhi Chandra; Moon, Deok Hyun; Jagupilla, Sarath Chandra; Christodoulatos, Christos; Kim, Min Gyu (2016-03-01)

Bench scale and pilot scale treatability studies were conducted to evaluate the remediation of hexavalent chromium [Cr(VI)] in chromite ore processing residue (COPR) using calcium polysulfide. The results from the bench ...
Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils

Moon, Deok Hyun; Wazne, Mahmoud; Yoon, In-Ho; Grubb, Dennis G. (2016-03-01)

A stabilization/solidification (S/S) process for arsenic (As) contaminated soils was evaluated using cement kiln dust (CKD). Laboratory-prepared slurries, made of either kaolinite or montmorillonite, and field soils spiked ...
Assessment of ferrous chloride and Portland cement for the remediation of chromite ore processing residue

Wazne, Mahmoud; Jagupilla, Santhi; Moon, Deok Hyun (2016-06-10)

Chromite Ore Processing Residue (COPR) is an industrial waste containing up to 7% chromium (Cr) including up to 5% hexavalent chromium [Cr(VI)]. The remediation of COPR has been challenging due to the slow release of Cr(VI) ...
Assessment of soil washing for Zn contaminated soils using various washing solutions

Moon, Deok Hyun; Lee, Ju-Ry; Wazne, Mahmoud; Park, Jeong-Hun (2016-02-29)

Bench-scale soil washing experiments were conducted to remove Zn from contaminated soils. Various washing solutions including hydrochloric acid (HCl), nitric acid (HNO3), sodium hydroxide (NaOH), oxalic acid (HOOCCOOH·2H2O), ...
Beneficial Use of Steel Slag Fines to Immobilize Arsenite and Arsenate

Grubb, D.; Wazne, Mahmoud; Jagupilla, S.; Malasavage, N. (2016-02-29)

This study presents the results of an extensive beneficial-use evaluation of -in. minus steel slag fines (SSF) to immobilize arsenic. Two primary sets of experiments were undertaken to assess (1) the ability of SSF to ...
Carbonate Effects on Hexavalent Uranium Adsorption by Iron Oxyhydroxide

Wazne, Mahmoud; Korfiatis, George P.; Meng, Xiaoguang (2016-03-01)

Carbonate dramatically affects the adsorption of uranium (U(VI)) onto iron hydroxides and its mobility in the natural environment. Batch tests, zeta potential measurements, and Fourier transform infrared (FTIR) spectroscopic ...
Carbonate effects on hexavalent uranium removal from water by nanocrystalline titanium dioxide

Wazne, Mahmoud; Meng, Xiaoguang; Korfiatis, George P.; Christodoulatos, Christos (2016-03-01)

A novel nanocrystalline titanium dioxide was used to treat depleted uranium (DU)-contaminated water under neutral and alkaline conditions. The novel material had a total surface area of 329 m2/g, total surface site density ...
Comparative study of nano zerovalent iron, micro zerovalent iron and emulsified nano zerovalent iron for the remediation of TCE and Cr(VI) contaminated groundwater

Wazne, Mahmoud; Jagupilla, Santhi Chandra; Liu, Xuyang; Rabah, Nidal; Lazar, Brendan; Su, Tsan-Liang; Christodoulatos, Christos (2017-12-11)

Groundwater pollution by volatile organic contaminants (VOC) and heavy metals is a serious environmental problem and the application of zero valent iron (ZVI) is one of the more promising solutions. The purpose of this ...
Effects of electrolytes and suwannee river humic acid on the aggregation behavior of silicon nanoparticles

Wazne, Mahmoud; Liu, Xuyang; Xiao, Ru; Chou, Tsengming; Christodoulatos, Christos (2017-07-24)

Studies about the impact of the release of silicon nanomaterials to the environment and on human health by the microelectronics and biomedical devices industries are urgently needed. The aggregation kinetics of silicon ...
Effects of natural and calcined oyster shells on antimony solubility in shooting range soil

Wazne, Mahmoud; Mahtab, Ahmad; Moon, Deok Hyun; Joung Kim, Hee; Han Lee, Young; Sik Ok, Yong (2016-06-09)

Waste oyster shells (OS) and calcined oyster shells (COS) were used to treat metal-contaminated shooting range soil, where antimony (Sb) leachability was assessed. Changes in soil pH induced by the amendments strongly ...
Effects of natural organic matter on aggregation kinetics of boron nanoparticles in monovalent and divalent electrolytes

Liu, Xuyang; Wazne, Mahmoud; Han, Yun; Christodoulatos, Christos; Jasinkiewiczc, Kristin (2016-02-29)

Nano boron is a promising new propellant being considered for military and civilian applications; however, the impact of its release on the environment is largely not known. The early stage aggregation kinetics of boron ...
Effects of particle size and acid addition on the remediation of chromite ore processing residue using ferrous sulfate

Jagupilla, Santhi; Moon, Deok Hyun; Wazne, Mahmoud; Christodoulatos, Christos; Kim, Min Gyu (2016-03-01)

A bench-scale treatability study was conducted to assess the effects of particle size and acid addition on the remediation of chromite ore processing residue (COPR) using ferrous sulfate. The remediation scheme entailed ...
Environmentally-friendly replacement for mercurous nitrate test of copper alloys

Wazne, Mahmoud; Billapati, Sant-Sri; Christodoulatos, Christos; Jasinkiewicz, Kristin L.; Hespos, Micheal; Hogrelius, Kimberly E. (2017-04-26)

Brass cartridge cases are tested for tensile residual stresses by mercurous nitrate immersion in accordance with ASTM B154. The test has been used for many years as an accelerated, lot acceptance test to detect tensile ...
Ettringite-Induced Heave in Chromite Ore Processing Residue (COPR) upon Ferrous Sulfate Treatment

Dermatas, Dimitris; Chrysochoou, Maria; Moon, Deok Hyun; Grubb, Dennis G.; Wazne, Mahmoud; Christodoulatos, Christos (2016-03-01)

A pilot-scale treatment study was implemented at a deposition site of chromite ore processing residue (COPR) in New Jersey. Ferrous sulfate heptahydrate (FeSO4·7H2O) was employed to reduce hexavalent chromium in two dosages ...

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