نتایج جستجو برای: modified bentonites
تعداد نتایج: 250953 فیلتر نتایج به سال:
This paper evaluates the suitability of some smectite-rich samples from northern Patagonia (Argentina) for pharmaceutical use. The clays must comply with some general features before considering their use in pharmacy, including high mineral and chemical purity and the absence of microbial pathogens. Specific characteristics such as sediment volume, swelling power and gel formation are also impo...
The removal of potentially harmful radioactive waste from the anthroposphere will require disposal in geological repositories, designs which often favour inclusion a clay backfill or engineered barrier around waste. Bentonite is proposed as this and understanding its long-term performance behaviour vital establishing safety case for usage. There are many different compositions bentonite that ex...
در این مطالعه، مدل های ترمودینامیکی مایع-مایع بررسی شده اند. پیش بینی داده های تعادلی با سه مدل nrtl، uniquac و modified-uniquac برای سه سیستم (آب، متانول، mtbe)، (آب، متانول، tame) و (آب، متانول،1-اکتانول) در دمای c?25 انجام گرفته است.کد نویسی این سه مدل در محیط متلب انجام شده است؛ همچنین با استفاده از این نرم افزار پارامترهای سه تایی برای مدل modified-uniquac محاسبه گردیده است. هدف از این کار...
The removing zinc cation from aqueous solution by Ca-bentonite and Na-exchanged bentonite was studied. The factors such as the initial concentration of Zn, the liquid-to-solid ratio, pH, adsorption time, stirring speed, coexisting ions, temperature and bentonite particle size were investigated. The results show that the adsorption process of bentonite accorded with the Freundlich isotherm model...
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