Effects of pH, temperature, and water quality on chloride removal with ultra-high lime with aluminum process

The ultra high-lime with aluminum process (UHLA) has the ability to remove sulfate and chloride in addition to other scale-forming materials from recycled cooling water. Laboratory experiments have demonstrated that the UHLA process can achieve high chloride removal from recycled cooling water, and...

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Veröffentlicht in:Water environment research : a research publication of the Water Environment Federation. - 1998. - 78(2006), 9 vom: 17. Sept., Seite 930-7
1. Verfasser: Abdel-Wahab, Ahmed (VerfasserIn)
Weitere Verfasser: Batchelor, Bill
Format: Aufsatz
Sprache:English
Veröffentlicht: 2006
Zugriff auf das übergeordnete Werk:Water environment research : a research publication of the Water Environment Federation
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Calcium Compounds Chlorides Oxides Water 059QF0KO0R lime C7X2M0VVNH Aluminum CPD4NFA903
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520 |a The ultra high-lime with aluminum process (UHLA) has the ability to remove sulfate and chloride in addition to other scale-forming materials from recycled cooling water. Laboratory experiments have demonstrated that the UHLA process can achieve high chloride removal from recycled cooling water, and an equilibrium model was developed to describe chemical behavior during chloride removal. This paper describes the influence of pH, temperature, and initial chloride concentration on chloride removal by UHLA and identifies the precipitated solids formed during treatment. The optimum pH for maximum chloride removal efficiency was found to be 12 +/- 0.2. Chloride removal efficiency was higher at a high initial chloride concentration than at a low initial chloride concentration with the chemical doses used. Solids formed during UHLA treatment were identified by x-ray diffraction as calcium chloroaluminate, tricalcium hydroxyaluminate, and tetracalcium hydroxyaluminate. This supports the assumption of the equilibrium model that these compounds are present and form a solid solution 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
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650 7 |a Water  |2 NLM 
650 7 |a 059QF0KO0R  |2 NLM 
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650 7 |a Aluminum  |2 NLM 
650 7 |a CPD4NFA903  |2 NLM 
700 1 |a Batchelor, Bill  |e verfasserin  |4 aut 
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