Author: Bilgen YüncüPublisher:
ISBN:
Category :
Languages : en
Pages : 165
Book Description
Removal of 2-Methylisoborneol and Geosmin by High-Silica Zeolites and Powdered Activated Carbon in the Absence and Presence of Ozone
Author: Bilgen YüncüFactors Affecting Geosmin Removal from Drinking Water with Powdered Activated Carbon at the Auburn Water Treatment Plant
Author: James Patrick KizerPublisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 232
Book Description
Catechismvs Christia-nae Fi-dei, Ex Verbo Dei Conscriptvs
Author: A Study of Geosmin Removal
Author: Sanaan Cherie LairPublisher:
ISBN:
Category : Carbon, Activated
Languages : en
Pages : 136
Book Description
Study on the Removal of Geosmin by Activated Carbon and by KMnO4 in a High PH Water Treatment System
Author: Edward Charles BatesPublisher:
ISBN:
Category : Geosmin
Languages : en
Pages : 128
Book Description
Effect of Lime Solids and Natural Organic Matter on Geosmin Removal Via Powdered Activated Carbon
Author: Andrew John RescorlaPublisher:
ISBN:
Category :
Languages : en
Pages : 114
Book Description
Effect of Activated Carbon, Oxidation and UV Treatment on 2-methylisoborneol and Geosmin Removal from Treated Water
Author: Junfeng YanPublisher:
ISBN:
Category : Carbon, Activated
Languages : en
Pages : 89
Book Description
Removal of Geosmin and 2-Methylisoborneol Using Algaecides and Chemicals in Potable Water
Author: Hanbai ParkPublisher:
ISBN:
Category :
Languages : en
Pages : 137
Book Description
Common taste and odor compounds in drinking water include 2-methylisoborneol (2-MIB) and trans-1,10-dimethyl-trans-9-decalol (geosmin). These compounds are difficult to remove through conventional water treatment. Thus, additional research is necessary to find cost-effective methods for removal of geosmin and MIB. The effects of algaecides and chemicals in various conditions (dosage, pH, temperature, turbulence, biodegradation) on geosmin and MIB were investigated, and compounds were analyzed through gas chromatograph and mass spectrometric methods (GC/MS) with solid-phase microextraction (SPME). The experiments were performed using both deionized water and lake water samples. At the recommended manufacturer's dosages of six chemicals (Earth Tec®, Cutrine Plus, Algimycin PWF, Sulfuric Acid, Phycomycin SCP, Calcium chloride dehydrate), removals of geosmin and MIB were unsatisfactory. Acidic conditions were shown to remove the compounds through dehydration. In pH experiments, MIB started to be removed as pH was reduced and was completely removed at pH 3.0. Geosmin showed removal at pH 3.5 and complete removal at pH 2.0. When the samples were returned to neutral (pH=7.5) using sodium hydroxide, geosmin was recovered around 50%, while MIB remained dehydrated. For biodegradation experiments, geosmin was volatilized around 10 -30% and MIB was volatilized around 5-10% for 8 days, but there was negligible impact of biodegradation. In temperature and turbulence experiments, geosmin and MIB removals showed negligible impacts of temperature and turbulence. In futher experiments, three chemicals were found to remove geosmin and MIB as follows: sodium sulfate 70-80%, calcium chloride dehydrate 40-50%, copper sulfate 40%-70%, all at high dosages.
Removal of Geosmin and 2-methylisoborneol from Drinking Water Through Biologically Active Sand Filters
Author: Bridget McDowallPublisher:
ISBN:
Category : Water
Languages : en
Pages : 426
Book Description
Adsorption of Methyl Tertiary-Butyl Ether on High-Silica Zeolites: Effects of Adsorbent Characteristics and Natural Organic Matter on Adsorption Isotherms
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Methyl tertiary-butyl ether (MTBE) is frequently detected in surface and ground water. Because of its hydrophilicity, MTBE is difficult to remove from aqueous solution by activated carbon adsorption processes. In drinking water treatment applications, natural organic matter (NOM) also adsorbs on activated carbons, which further decreases the MTBE adsorption capacity. Unlike activated carbons, high-silica zeolites are adsorbents with well-defined pore sizes. From a drinking water treatment perspective, it may be possible to select high-silica zeolites with pore sizes that are suitable for the adsorption of smaller organic contaminants while preventing the adsorption of competing NOM components of larger molecular size. Therefore, the objectives of this research were to evaluate the effects of zeolite pore structure and hydrophobicity on the adsorption of MTBE in the presence of NOM. MTBE adsorption isotherm data were collected for a matrix of high-silica zeolites with different pore sizes (ZSM-5/silicalite, Mordenite, Beta, Y), exchangeable cations (H+, Na+, NH4+), and hydrophobicities (SiO2/Al2O3 ratios). MTBE adsorption capacities of high-silica zeolites were compared to those of three GACs (one coconut-shell-based, two coal-based) and a carbonaceous resin (Ambersorb 563). Single-solute isotherm tests were conducted in ultrapure water buffered at pH 7.2. Additional isotherm studies were conducted to determine the effects of co-adsorbing and preloaded NOM on MTBE adsorption from Tar River water (Greenville, NC). Single-solute MTBE adsorption isotherm data showed that high-silica zeolites with smaller pores (ZSM-5/silicalite, Mordenite) were more effective adsorbents for MTBE than zeolites with somewhat larger pores (Beta, Y). Over a range of 90-700, the SiO2/Al2O3 ratio of the tested ZSM-5 zeolites had no effect on MTBE adsorption capacity. Similarly, the exchangeable cation (H+, Na+, NH4+) of high-silica ZSM-5 zeolites had little effect on MTBE adsorption at the te.