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| 1 | Influence of coagulation mechanisms and floc formation on filterability显示文摘Minimizing particles in water is a key goal for improving drinking water quality and safety.The media filtration process,as the last step of the solid–liquid separation process,is largely influenced by the characteristics of flocs,which are formed and controlled within the coagulation process.In a laboratory-based study,the impacts of the physical characteristics of flocs formed using aluminum sulfate on the filtration treatment of two comparative water samples were investigated using a photometric dispersion analyzer and a filterability apparatus.In general,the optimum dosage for maximizing filterability was higher than that for minimizing turbidity under neutral p H conditions.For a monomeric aluminum-based coagulant,the charge neutralization mechanism produced better floc characteristics,including floc growth speed and size,than the sweep flocculation mechanism.In addition,the charge neutralization mechanism showed better performance compared to sweep flocculation in terms of DOC removal and floc filterability improvement for both waters,and showed superiority in turbidity removal only when the raw water had high turbidity.For the different mechanisms,the ways that floc characteristics impacted on floc filterability also differed.The low variation in floc size distribution obtained under the charge neutralization mechanism resulted in the flocs being amenable to removal by filtration processes.For the sweep flocculation mechanism,increasing the floc size improved the settling ability of flocs,resulting in higher filter efficiency. | Ruyuan Jiao Rolando Fabris Christopher W.K.Chow Mary Drikas John van Leeuwen Dongsheng Wang Zhizhen Xu | 2017 | Journal of Environmental Sciences2017，29，7： | 6 |
| 2 | Prediction of DOM removal of low specific UV absorbance surface waters using HPSEC combined with peak fitting显示文摘High performance size exclusion chromatography (HPSEC) is used in water quality research primarily to determine the molecular weight distribution of the dissolved organic matter (DOM), but by applying peak fitting to the chromatogram, this technique can also be used as a tool to model and predict DOM removal. Six low specific UV absorbance (SUVA) source waters were treated using coagulation with alum and both the source and treated water samples were analysed using HPSEC. By comparing the molecular weight profiles of the source and treated waters, it was established that several DOM components were not effectively removed by alum coagulation even after high dosage alum treatment. A peak-fitting technique was applied based on the concept of linking the character (molecular weight profile) of the recalcitrant organics in the treated water with those of the source water. This was then applied to predict DOM treatability by determining the areas of the peaks which were assigned to removable organics from the source water molecular weight profile after peak fitting, and this technique quantified the removable and non-removable organics. The prediction was compared with the actual dissolved organic carbon (DOC) removal determined from jar testing and showed good agreement, with variance between 2% and 10%. This confirmed that this prediction approach, which was originally developed for high SUVA waters, can also be applied successfully to predict DOC removal in low SUVA waters. | Linan Xing Rolando Fabris W.K.Chow John van Leeuwen Mary Drikas Dongsheng Wang | 2012 | Journal of Environmental Sciences2012，24，7： | 4 |
| 3 | A rapid fracfionation technique to characterize natural organic matter for the optimization of water treatment processes 显示文摘 | Christopher W K Chow Rolando Fabris Mary Drikas | 2004 | Journal of Water Supply: Research and Technology-AQUA2004，，： | 1 |
| 4 | A rapid fractionation technique to characterize natural organic matter for the optimisation of water treatment processes显示文摘 | Chow C W K Fabris Rolando Drikas Mary | 2004 | J Water Supply2004，53，2： | 1 |
| 5 | Assessing natural organic matter treatability using high performance size exclusion chromatbgra-phy显示文摘 | Christopher W K Chow Rolando Fabris John Van L-eeuwen | 2008 | Environ Sci Technol2008，42，18： | 1 |
| 6 | Pre-treatments to reduce fouling of low pressure microfiltration membranes 显示文摘 | Fabris Rolando Lee Eun Kyung Chow C W K | 2007 | J Membr Sci2007，289，12： | 1 |
| 7 | A rapid fractionation technique to characterize natural organic matter for the optimisation of water treatment processes 显示文摘 | Christopher W K Chow Rolando Fabris Mary Drikas | 2004 | Journal of water supply2004，53，2： | 1 |
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