搜索结果: 1-15 共查到“知识库 地质学 pH”相关记录52条 . 查询时间(0.261 秒)
Octanol-water partition coefficients (Kow) vs. pH for fluorescent dye tracers (fluorescein, eosin Y), and implications for hydrologic tracer tests
fluorescein eosin Y tracer octanol-water retardation
2017/4/11
Values of the octanol-water partition coefficient (Kow) have been measured vs. pH for two fluorescent dyes (fluorescein,
eosin Y) commonly used in hydrologic tracer tests. Values for both fluorescent...
The effect of pH on the uptake of zinc and cadmium in marine phytoplankton: Possible role of weak complexes
zinc cadmium weak complexes
2014/4/4
In natural samples from the New Jersey coast and the Gulf of Alaska, zinc (Zn) and cadmium (Cd) uptake
rates by phytoplankton decreased on average about 30% as pH was decreased from 8.5 to 7.9 or 7.7...
通过一次平衡法考察了pH、离子强度和溶剂介电常数对红壤吸附低分子量有机酸的影响。研究结果表明,随着溶液pH值的升高有机酸的吸附量降低,其中草酸和酒石酸的吸附量在pH3.5~5.0范围内随着pH值的升高而急剧下降,之后缓慢下降(pH5.0~7.0)。柠檬酸、酒石酸和苹果酸的吸附量在1~2mmol/L初始浓度范围内随着离子强度的增加没有明显变化,但在2~20mmol/L初始浓度范围内却随着离子强度的增...
Uptake properties of Eu(III) on Na-attapulgite as a function of pH, ionic strength and temperature
Eu(III) Sorption Na-attapulgite pH Ionic strength Thermodynamic data
2011/11/10
Herein, the sorption properties of Eu(III) on Na-attapulgite were performed by using batch sorption experiments under different experimental conditions, such as contact time, pH, ionic strength, humic...
Effects of pH, ionic strength, temperature, and humic acid on Eu(III) sorption onto iron oxides
Iron oxides Eu(III) Sorption HA Temperature
2011/11/10
Effects of pH, Eu(III) concentration, ionic strength, temperature and humic acid (HA) on Eu(III) sorption to iron oxides were investigated in detail. The sorption of Eu(III) to iron oxides was signifi...
Sorption of uranium(VI) on Na-attapulgite as a function of contact time, solid content, pH, ionic strength, temperature and humic acid
Attapulgite U(VI) Sorption pH Ionic strength Temperature
2011/11/10
Sorption of U(VI) from aqueous solution to Na-attapulgite was investigated at different experimental chemistry conditions by using batch technique. The attapulgite sample was characterized by FTIR and...
环境pH值条件的变化是影响土壤胶体运移的重要因素之一.本文选取土壤体系中常见的两种不同结构类型的粘土矿物胶体高岭石和蒙脱石作为主要实验材料,通过室内模拟实验和数学模型分析的手段,分别研究了不同pH值条件下,两种无机胶体在多孔介质中的迁移规律.结果表明:高岭石胶体受溶液的pH条件影响强烈,随着pH的变化,ξ电位及颗粒粒径大小发生明显变化,不同的pH条件下的穿透曲线差异明显.在酸性条件下,高岭石胶体回...
Sorption study of radionickel on attapulgite as a function of pH, ionic strength and temperature
Attapulgite Radionickel pH Temperature Thermodynamic data
2011/11/10
Sorption of radionickel on attapulgite is studied as a function of contact time, ionic strength, pH and temperature. The results indicate that the sorption of Ni(II) on attapulgite is strongly ionic s...
A pH-Sensitive Composite Hydrogel Based on Sodium Alginate and Medical Stone:Synthesis, Swelling, and Heavy Metal Ions Adsorption Properties
composite hydrogel sodium alginate medical stone swelling adsorption pH-sensitivity
2011/12/14
New pH-sensitive composite hydrogels were synthesized by free-radical graft copolymerization among sodium alginate (NaAlg), sodium acrylate (NaA), and medical stone (MS). Fourier transform infrared sp...
A pH-, salt- and solvent-responsive carboxymethylcellulose-g-poly(sodium acrylate)/medical stone superabsorbent composite with enhanced swelling and responsive properties
polymer composites carboxymethylcellulose medical stone superabsorbent smart-responsive swelling
2011/12/13
Free-radical graft copolymerization among sodium carboxymethylcellulose (CMC), partially neutralized acrylic acid (NaA), medical stone (MS) and crosslinker N,N!-methylene-bis-acrylamide (MBA) was perf...
A pH-, salt- and solvent-responsive carboxymethylcellulose-g-poly(sodium acrylate)/medical stone superabsorbent composite with enhanced swelling and responsive properties
polymer composites carboxymethylcellulose medical stone superabsorbent smart-responsive swelling
2011/12/14
Free-radical graft copolymerization among sodium carboxymethylcellulose (CMC), partially neutralized acrylic acid (NaA), medical stone (MS) and crosslinker N,N!-methylene-bis-acrylamide (MBA) was perf...
The sorption of Eu(III) on calcareous soil: effects of pH, ionic strength, temperature, foreign ions and humic acid
Sorption Europium HA Temperature Ionic strength Foreign ions
2011/11/10
The sorption of Eu(III) on calcareous soil as a function of pH, humic acid (HA), temperature and foreign ions was investigated under ambient conditions. Eu(III) sorption on soil was strongly pH depend...
pH-Responsive Carboxymethylcellulose-g-Poly(sodium acrylate)/Polyvinylpyrrolidone Semi-IPN Hydrogels with Enhanced Responsive and Swelling Properties
carboxymethyl cellulose polyvinylpyrrolidone semi-interpenetrated polymer network superabsorbent hydrogel pH-responsive
2011/12/13
Novel pH-responsive semi-interpenetrated polymer network (semi-IPN) superabsorbent hydrogels were prepared by the radical graft polymerization of carboxymethylcellulose (CMC) and partially neutralized...
生物膜作用下沉积物-水界面溶液中pH和磷含量变化
生物膜 界面 磷 pH
2014/6/6
采集城市排污水渠中的沉积物样品和底栖生物样品,应用微电极原位pH测量技术测量沉积物-水界面溶液的pH值,电感耦合等离子体发射光谱法测定沉积物提取液中上覆水和空隙水中生物可利用磷的含量,研究了沉积物表面的生物膜对城市河流沉积物-水界面微环境中pH值和磷含量的影响。研究表明沉积物表面的生物膜由藻类(蓝藻门颤藻属Oscillatoria和硅藻门的菱形藻Nitzschia)和微生物组成,由于藻类的光合作用...