4篇
您的检索式：作者名="Shenglei Sun"
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| 1 | Coagulation behavior and floc properties of compound bioflocculant–polyaluminum chloride dual-coagulants and polymeric aluminum in low temperature surface water treatment显示文摘This study was intended to compare coagulation behavior and floc properties of two dualcoagulants polyaluminum chloride–compound bioflocculant(PAC–CBF)(PAC dose first) and compound bioflocculant–polyaluminum chloride(CBF–PAC)(CBF dose first) with those of PAC alone in low temperature drinking water treatment. Results showed that dualcoagulants could improve DOC removal efficiency from 30% up to 34%. Moreover, CBF contributed to the increase of floc size and growth rate, especially those of PAC–CBF were almost twice bigger than those of PAC. However, dual-coagulants formed looser and weaker flocs with lower breakage factors in which fractal dimension of PAC–CBF flocs was low which indicates a looser floc structure. The floc recovery ability was in the following order:PAC–CBF > PAC alone > CBF–PAC. The flocculation mechanism of PAC was charge neutralization and enmeshment, meanwhile the negatively charged CBF added absorption and bridging effect. | Xin Huang Shenglei Sun Baoyu Gao Qinyan Yue Yan Wang Qian Li | 2015 | Journal of Environmental Sciences2015，27，4： | 11 |
| 2 | Preparation and Bloating Mechanism of Porous Ultra-lightweight Ceramsite by Dehydrated Sewage Sludge and Yellow River Sediments显示文摘To solve the disposal problems of solid wastes, dehydrated sewage sludge and Yellow River sediments were tested as components for production of ultra-lightweight ceramsite. The effects of Yellow River sediments addition on the characteristics of ceramsite were investigated. Ceramsite with different Yellow River sediments additions was characterized using thermal analysis, X-ray diffraction, morphological structures analyses, pore size distributions and porosity analyses. Chemical components, especially ratios of Si O2 + Al2O3/Flux, were used to explain the glassy shell formation, physical properties and pores distribution of ultralightweight ceramsite; physical forces for instance expansion force and frictional resistance which combined with Si O2 + Al2O3/Flux ratios were used to explain the bloating mechanism. Results showed that the maximum addition of Yellow River sediments for making ultra-lightweight ceramsite was 35%. Macropores(between 0.226 μm and 0.554 μm) of ultra-lightweight ceramsite were dominant in the pore structures of ultra-lightweight ceramsite and its porosity was up to 67.7%. Physical force of expansion force was constant with the variation of Yellow River sediments content and physical force of frictional resistance was decreased with the increase of Yellow River sediments addition. The relationship between expansion and frictional resistance could determine the expansion rate of ceramsite. Larger pores inside the ceramsite bodies could be obtained as Yellow River sediments additions ranged from 10% to 30%. Ceramsite with higher Yellow River sediments additions of 40%(Si O2 + Al2O3/Flux ratios 4.25) became denser and have lower porosity. Crystal components analysis proved that the sintering process made some components of raw materials transfer into other crystals having better thermostability. | 岳东亭 岳钦艳 GAO Baoyu HE Hongtao YU Hui SUN Shenglei LI Qian WANG Yan ZHAO Yu | 2014 | Journal of Wuhan University of Technology(Materials Science)2014，29，6： | 7 |
| 3 | Advanced lignin-acrylamide water treatment agent by pulp and paper industrial sludge: Synthesis, properties and application显示文摘A novel flocculant LA(lignin-acrylamide polymer), which was used as aid for aluminum sulfate and polyaluminum chloride in this study, was prepared by grafting acrylamide onto lignin that deriving from pulp and papermaking sludge. Physicochemical properties of LA were measured by X-ray photoelectron spectroscopy and scanning electron microscopy. The experimental outcome indicated acrylamide was grafted onto the lignin backbone successfully. The efects of LA addition were evaluated on coagulation performance and floc characteristics as a function of aluminum(Al) dosage, such as floc size, growth rate, strength and recoverability. Efects of diferent dosing sequences, Al dosed first and LA dosed first, were also investigated. LA used as coagulant aid markedly enhanced the removal efciency of turbidity and dissolved organic carbon, especially at low Al dosages. The dissolved organic carbon removal efciencies of aluminum sulfate and polyaluminum chloride at the Al dosage range selected in this study were improved more than 30% and 5% by LA, respectively. LA dramatically enlarged floc size and it was in the order: Al dosed first > LA dosed first > Al. Floc strength and recoverability were also improved by LA. LA played a significant role in charge neutralization, adsorption and bridging in floc formation. | Hongyan Rong Baoyu Gao Yanxia Zhao Shenglei Sun Zhonglian Yang Yan Wang Qinyan Yue Qian Li | 2013 | Journal of Environmental Sciences2013，25，12： | 2 |
| 4 | Coagulation efficiency,floc properties and membrane fouling of polyaluminum chloride in coagulation-ultrafiltration system:The role of magnesium显示文摘 | Zhao Shuang Gao Baoyu Sun Shenglei | 2015 | Colloids and Surfaces A:Physicochemical and Engineering Aspects2015，469，： | 1 |
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