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环境科学学报 2024年第5期44卷 128-137页

作者：张锋蒋才芳刘敏梁虹许谦蒋菱董慧峪 ali m.shayekh-salehi 谢婷刘绍刚广西民族大学化学化工学院林产化学与工程国家民委重点实验室广西林产化学与工程重点实验室广西林产化学与工程协同创新中心南宁530008 中国科学院生态环境研究中心中国科学院饮用水科学与技术重点实验室北京100085 广西绿城水务股份有限公司南宁530031

给水厂的生产废水的回用安全性,备受水务行业关注.本研究以邕江原水和砂滤池反冲洗废水为对象,对某给水厂沿程各单元出水的一般性和毒理学水质指标进行长周期监测,例如浊度、UV_(254)、氨氮(NH_(4)^(+)-N)、高锰酸盐指数(COD_(mn))、农... 详细信息

给水厂的生产废水的回用安全性,备受水务行业关注.本研究以邕江原水和砂滤池反冲洗废水为对象,对某给水厂沿程各单元出水的一般性和毒理学水质指标进行长周期监测,例如浊度、UV_(254)、氨氮(NH_(4)^(+)-N)、高锰酸盐指数(COD_(mn))、农药、抗生素等微污染物,探讨砂滤池反冲洗水直接回用对给水厂水质的影响.结果显示,给水厂砂滤池反冲洗水中浊度、氨氮、DOC和COD_(mn)普遍高于原水,且冬季较高其他季节;UV_(254)、SO_(4)^(2-)、NO_(3)^(-)、Pb、Cu等指标与出厂水相差不大,反冲洗水直接回用对出厂水水质影响不大.各处理单元出水中检出33种农药和4种抗生素,其含量远低于《生活饮用水卫生标准》(GB 5749-2022)限值,但唑醚菌胺、磺胺二甲异嘧啶、诺氟沙星和环丙沙星稍高于原水.荧光光谱分析表明,各处理单元出水的溶解性有机质(DOm)的主要组分为类腐殖质物质和类蛋白质物质,水处理工艺对芳香蛋白类及溶解性微生物代谢产物有一定去除作用.砂滤池反冲洗水中富集较多铝(Al),浓度达到0.18 mg·L^(-1),回用时需加以关注.健康风险评价模型结果显示出厂水中残余铝的个人健康年风险最大值为5.34×10^(-7),低于最大可接受年风险水平10^(-6).

关键词：反冲洗水废水回用水质分析长周期监测健康风险评估

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Spatial variability of soil microbial indices in common alder COmmON ALDER(Alnus glutinosa) stands using a geostatistical approach in northern Iran

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Journal of Forestry Research 2019年第2期30卷 679-688页

作者： Neda Ghorbanzadeh ali salehi Hassan Pourbabaei ali Ashraf Soltani Tolarod Seyed Jalil Alavi Department of Forestry Faculty of Natural ResourcesUniversity of Guilan Department of Soil Science Faculty of Agriculture and Natural Resources University of Mohaghegh Ardabili Department of Forestry Faculty of Natural Resources and Marine Sciences University of Tarbiat Modares

microbial indices and their spatial patterns are strongly affected by environmental factors. Spatial variability of soil properties is one of the most important causes of variability in soil microbial indices. This research was conducted in the Caspian forest to assess spatial variabilities and frequency distributions of microbial *** soil samples were taken using a grid sampling design 40 9 40 m. microbial indices, organic carbon,nitrogen and pH were determined. Soil variable distributions showed that microbial indices had abnormal distributions. Logarithmic transformation produced normal distribution. Spatial continuity using geostatistical(variogram) was studied and maps obtained by point *** variograms revealed the presence of spatial autocorrelation. The results indicate that spatial dependence of soil microbial indices was affected by non-intrinsic factors and forest management procedures. The maps show that soil microbial indices and soil properties have spatial variability. The spatial pattern of microbial indices was correlated to organic carbon and nitrogen.

关键词： Variograms Soil microbial indices Spatial distribution Natural forest Iran

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modeling of moisture loss kinetics and color changes in the surface of lemon slice during the combined infrared-vacuum drying

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Information Processing in Agriculture 2018年第4期5卷 516-523页

作者： Fakhreddin salehi mahdi Kashaninejad Department of Food Industry machines Bu-Ali Sina UniversityHamedanIran Faculty of Food Science Gorgan University of Agricultural Sciences and Natural ResourcesGorganIran

Color is one of the most important appearance attributes of food materials,since it influences consumer *** this study the effects of combined infrared-vacuum drying on the drying kinetics,moisture diffusivity,surface changes(shrinking)and color changes kinetics of lemon slices were *** the infrared lamp power and vacuum pressure influenced the drying time of lemon *** regression results showed that the quadratic model satisfactorily described the drying behavior of lemon slices with highest R value and lowest SE *** effective moisture diffusivity increased from 2.92×10^-10 and 1.58×10^-9m^2/s when the infrared lamp power was increased from 300 to *** colour parameters L^*(lightness),a^*(redness/greenness),b^*(yellowness/blueness),and DE(total colour difference)were used to estimate colour changes during drying.L^*,a^* and b^* values of dried lemon increased during *** rise in infrared power has a negative effect on the DE and with the increase of infrared radiation power it was *** kinetic models were used to fit the experimental data and the results revealed that the power model was the most suitable to describe the color change intensity(DE).

关键词： Colour parameters Image processing Infrared drying Kinetic Lemon

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Dynamic Simulation of Volume Fraction and Density Solid Phase Effect on Phase Hold-Up in 3 Phase Fluidize Bed Column through CFD

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Engineering（科研） 2015年第1期7卷 31-35页

作者： mohammad ali salehi ali Basiry Department of Chemical Engineering University of Guilan Rasht Iran

The gas-liquid-solid fluidized bed has emerged in recent years as one of the most promising devices for three-phase operation. Selection and design is one of them in parameter in the performance of three phase system. This paper focuses on volume fraction and density effect on the phases hold-up in a 3 phase fluidize bed column containing liquid phase with 100 cm height and 20 cm diameter, in this case the solid phase with 0.15, 0.25, 0.35 volume fraction and density 2470, 3000, 4000, 5000 m3 dispersion into liquid phase and the gas phase enter the column through a sparger of 2 cm diameter with 0.02 m/s velocities. The results show as the solid phase volume fraction increases from 0.02 to 0.08 m/s. The gas hold-up decreases and solid hold-up increases. Solid phase density increases, so solid phase hold-up decreases and gas hold-up decreases.

关键词： Hydrodynamic Fluidized Bed Phases Hold-Up Three Phase Fluidized Bed Column CFD

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Color changes and drying kinetics modeling of basil seed mucilage during infrared drying process

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Information Processing in Agriculture 2022年第3期9卷 397-405页

作者： Ghazale Amini Fakhreddin salehi majid Rasouli Faculty of Agriculture Bu-Ali Sina UniversityHamedanIran

The physicochemical properties and color of dried seed mucilage (gums) depend on thecondition and method of drying. So, in this study, the effects of infrared (IR) dryer systemparameters such as IR power (150, 250, and 375 W), distance of mucilage from lamp surface(4, 8, and 12 cm), mucilage thickness (0.5, 1.0, and 1.5 cm) on drying kinetics and colorindexes (L*a*b*) of basil seed mucilage (BSm) were examined in an IR dryer system. IR dry-ing kinetic of BSm was modeled using mathematical approach. Thus, experimental mois-ture ratio data were fitted to 8 various empirical models. It was found that Page model hasthe best fit to show the kinetic behavior and acceptably described the IR drying behavior ofBSm with the highest correlation coefficient values and the lowest standard error *** average effective moisture diffusivity (Deff) increased from 1.69×10^(-9)to 9.21×10^(-9)m^(2)/s with increasing lamp power from 150 W to 375 W, while it was decreased from7.93×10^(-9)to 2.65×10^(-9)m^(2)/s and 7.81×10^(-9)to 1.82×10^(-9)m^(2)/s with increasing the dis-tance of mucilage from 4 to 12 cm and the reduction of mucilage thickness from 1.5 to0.5 cm, respectively. The increasing in IR radiation power has a positive influence on thelightness (increasing L* index) of dried BSm and it reduced color changes index (DE) from13.04 to 11.51. The results showed that IR drying method has great industrial potential insaving processing time as well as energy with better maintenance of color and quality ofdried BSm.

关键词： Basil seed gum Drying kinetics moisture ratio Page model

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