131 |
Trihalomethane formation in contaminated surface water and its controlby membrane bio-reactorChu, Hiu-ping., 諸曉平. January 2003 (has links)
published_or_final_version / abstract / toc / Civil Engineering / Doctoral / Doctor of Philosophy
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132 |
Removal of algae and alkyl benzene sulfonate by coagulationParker, Clinton Eldridge. January 1964 (has links)
No description available.
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133 |
The effect of organic compounds on coagulationCormier, Barbara Louise, 1942- January 1976 (has links)
No description available.
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134 |
The use of bone and other phosphates for the removal of fluorine from drinking waterDavey, William Boileau, 1917- January 1939 (has links)
No description available.
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135 |
Photocatalytic oxidation of NiEDTASalama, Philippe. January 2007 (has links)
Metal-Ethylenediaminetetraacetic acid (EDTA) complexes are found in a variety of industrial process. The stability of the formed complexes makes these compounds often inert to conventional wastewater treatment systems. In this work, the photocatalytic oxidation of NiEDTA was investigated as a means of breaking up the chelated nickel. The studied variables included the light intensity rate, the catalyst (TiO2), oxygen and NiEDTA concentrations. Photocatalytic experiments showed that increasing the catalyst concentration (0.5-3.0 g/L) decreases the light penetration inside the reactor resulting in a decrease in the reaction rate. The effect of oxygen and NiEDTA concentration was shown to exhibit Langmuir-Hinshelwood type kinetics. Total organic carbon (TOC) did not show any significant mineralization of NiEDTA for all investigated conditions. As a result, the by-products of the reaction were measured and found to include ED3A (ethylenediaminetriacetic acid), N-N'-EDDA (ethylenediamindiaacetic acid), IDA (iminodiacetic acid), oxalic acid, oxamic acid, glyoxylic acid, formaldehyde, ammonia, nitrate and nitrite. ED3A was found to be the major by-product of the reaction and nitrogen added from NiEDTA was found to be released as ammonia nitrogen. Oxygen consumption experiments were demonstrated as an effective way to monitor the rate of the reaction through measurement of the electron oxygen utilization rate. Nickel precipitation experiments showed that some of the by-products of NiEDTA degradation formed complexes with nickel. Finally, a light distribution model was generated using a CFD software (Fluent 6.1.22). For the catalyst concentration range of 0.5 to 3.0 g/L, this model showed that all of the light energy supplied by a centered UV lamp is absorbed within a one centimeter distance. Using the local volumetric rate of energy absorption (LVREA) calculated from the model the rate of the reaction was expressed in terms of quantum yield. For experiments carried out with air the quantum yield showed that the degradation rate was limited from an insufficient oxygen supply for electron scavenging. Increasing the oxygen concentration to 0.60 mmole O2/L increased the quantum yield for the highest light intensity rate; however the quantum yield never reached an optimum value thus indicating that other limiting conditions exist.
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Organoclays as sorbents for organic contaminants in aqueous and mixed-solvent systemsNzengung, Valentine Asongu 12 1900 (has links)
No description available.
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137 |
Improvement in polymeric iron chloride (PICI) preparation for coagulation processesLiu, Ta-Kang 12 1900 (has links)
No description available.
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138 |
The removal of color-causing organic substances from low alkalinity waters by coagulation with heavy metal hydrolyzing compounds.Beaudry, Jean-Paul January 1973 (has links)
No description available.
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139 |
An experimental investigation of a bubbling three-phase poolTaylor, Kevin Emory 12 1900 (has links)
No description available.
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140 |
Phytoremediation of 2,4,6-trinitrotoluene in contaminated wastewater-effects of soil and iron on remediationMcDonough, Kathleen M. 05 1900 (has links)
No description available.
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