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中国科学院地质与地球物理研究所冥古宙海洋pH迅速上升的物理机制探讨（图）
地壳 矿物 寒武纪
2025/2/28
海洋 pH 影响着碳在水圈中的分配、生物合成途径、地壳及自生矿物的稳定性，并决定地球的宜居性。然而，对早期海洋 pH的研究成果仍存在很大争议，估算值从强酸性到碱性不等。这种不确定性主要源于前寒武纪碳酸盐样本的稀缺，使得地学家们难以利用硼同位素等直接代用指标来追踪海洋 pH 的演化。
中国地质大学科学技术发展院朱健（博士生），袁松虎BGEG国家重点实验室 Water Research , MAR 15 2017. Production of Hydroxyl radicals from oxygenation of simulated AMD due to CaCO3-induced pH increase
碳酸钙；诱导；模拟酸性；矿山废水；pH升高；氧化；活化
2021/10/21
2017年3月15日，《Water Research》上刊发了中国地质大学生物地质与环境地质国家重点实验室朱健博士的论文——碳酸钙诱导模拟酸性矿山废水pH升高引起Fe(II)氧化活化氧气产生羟自由基(Production of hydroxyl radicals from oxygenation of simulated AMD due to CaCO3-induced pH increase)。
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...