The flocculation behavior of clay minerals in aquatic environments is an important process estuarine and riverine dynamics, where strong gradients salinity can locally occur. Various contradicting observations have been reported the literature on impact salt concentration settling cohesive sediments. To address this issue a systematic manner, we investigate as function ambient water. Specifical...

本研究では，ベントナイトの陽イオン交換容量（CEC）および各種浸出陽イオン量（LC）の測定方法について，ベントナイトの種類に着目して各手法を比較，検討した．試験方法は，酢酸アンモニウム，塩化バリウムおよび塩化ベンジルトリメチルアンモニウムクロリド（BTM）を用いる三種である．本研究にて改良した塩化バリウムを用いる方法と酢酸アンモニウムを用いる方法から得られた CEC は，6 種のベントナイトにおいて の差異が最大 8.8 cmol(+)/kg であり，おおむね一致することが分かった．また，BTMを交換溶媒とする測定方法では随伴鉱物の溶解が抑えることが可能であり，各種LCの合計からCECを，各種LCから交換性陽イオンの組成を推定可能であることを示した．

Sealing with waterborne clays is a rapid and low cost method of controlling seepage through porous media whenever the clay source is within economical shipping distance of the sealing site. But more must be learned about this method of sealing before it can be fully utilized. Water impedance of waterborne bentonites, as measured by water loss in the filter press test, was correlated with their ...

This article discusses the development of compositions new, effective, water-soluble fixatives-reagents based on local raw materials and industrial waste. A technology has been developed for obtaining using new types complex additives-fixers hydrolyzed polyacrylonitrile polyelectrolyte, which can be recommended implementation when fixing saline soils sands Aral region. Chemical reagents have se...

The Paleocene was a time of transition for the Arctic, with magmatic activity of the High Arctic Large Igneous Province (HALIP) giving way to magmatism of the North Atlantic Large Igneous Province in connection to plate tectonic changes in the Arctic and North Atlantic. In this study we investigate the Paleocene magmatic record and sediment pathways of the Basilika Formation exposed in the Cent...

Currently, approximately 70-80 % of casting production of ferrous alloys is done with sands containing bentonite (green sands). Information on an amount of active bentonite in moulding sands, after shakeout of casting, is necessary in the rebounding process of bentonite sands – under real casting house conditions. It decides how much of fresh bentonite should be added to moulding sands, thereby...