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RISStudy on Optimal Conditions for Recovery of EDTA from Soil Washing Effluents
Publisher: American Society of Civil Engineers
Abstract: The recovery of ethylenediaminetetraacetic acid (EDTA) from washing effluents is essential to reduce the cost of EDTA-enhanced soil washing and the production of wastewater. This study evaluated a recovery method, in which ...
Laminar Einstein Bed Load Transport Equation for Overland Sheet Flow
Publisher: American Society of Civil Engineers
Abstract: Einstein's bed load transport equation was modified for laminar overland flow under rainfall conditions. The modifications consisted of using a laminar velocity profile and a lift force calculated from the fluid drag force. ...
Closure to “<i>Laminar Einstein Bed Load Transport Equation for Overland Sheet Flow</i>” by Weihua Zhang and Terrance W. Cundy (December, 1987, Vol. 113, No. 12)
Publisher: American Society of Civil Engineers
EDTA-Enhanced Washing for Remediation of Pb- and/or Zn-Contaminated Soils
Publisher: American Society of Civil Engineers
Abstract: The effects of the operating conditions, the initial concentrations of heavy metals in soils, and the competition among heavy metals during ethylenediaminetetraacetic acid (EDTA)-enhanced soil washing were extensively ...
Chemical-Enhanced Washing for Remediation of Soils Contaminated with Marine Diesel Fuel in the Presence/Absence of Pb
Publisher: American Society of Civil Engineers
Abstract: The effects of the operating conditions, the initial concentrations of marine diesel fuel (MDF) and the coexisting Pb in the soil, and the ethylene diamine tetra acetic salt (EDTA) in solution on MDF removal by sodium ...
Improved Thermal and Vertical Trajectory Model for Performance Prediction of Stratospheric Balloons
Publisher: American Society of Civil Engineers
Abstract: Prediction of thermal behavior and trajectory plays an important role in design and operation of stratospheric balloons. First, a more rounded and improved thermal and vertical trajectory model for performance prediction ...
Three-Dimensional Numerical Study of the Conical Nozzle Side Loads during Staging
Publisher: American Society of Civil Engineers
Abstract: The objective of this paper is to numerically investigate the three-dimensional side loads and associated flow physics of a conical nozzle during the fire-in-the-hole staging event of the multistage rocket. The transient ...
A Collaboratively Iterative Sequential Approximate Optimization Method for Aerodynamic Optimization
Publisher: ASCE
Abstract: The sequential approximate optimization (SAO) method is widely adopted in aircraft optimization design, whose further improvement in efficacy and efficiency has encountered bottlenecks. In this paper, a collaboratively ...
Metal Mobility and Fraction Distribution in a Multimetal Contaminated Soil Chemically Stabilized with Different Agents
Publisher: American Society of Civil Engineers
Abstract: To investigate the efficiency of chemical stabilization on soil residuals after soil washing, laboratory batch experiments were performed on a clayish soil contaminated with Cu, Cr, Ni, Pb, Zn with lime,
Experimental and Numerical Investigations of High-Cycle Fatigue Properties of HTRB630 High-Strength Steel Bars
Publisher: ASCE
Abstract: To explore the application of heat-treated ribbed bar (HTRB) type HTRB630 high-strength steel bars in reinforced concrete bridges, the tensile test and high-cycle fatigue test are carried out. Then, the high-cycle fatigue ...