ترجمه مقاله با عنوان Comparison of silver and palladium nanoparticles loaded on activated carbon for efficient removal of Methyl

اختصاصی از سورنا فایل ترجمه مقاله با عنوان Comparison of silver and palladium nanoparticles loaded on activated carbon for efficient removal of Methylene blue: Kinetic and isotherm study of removal process دانلود با لینک مستقیم و پر سرعت .

متن کامل ترجمه مقاله ISI در Elsevier در فایل word به فروش می رسد که ترجمه چکیده آن را به عنوان نمونه می توانید ملاحظه فرمایید.

Comparison of silver and palladium nanoparticles loaded on activated carbon for efficient removal of Methylene blue: Kinetic and isotherm study of removal process

Abstract

The objective of this study was to assess and compare the usability of silver and palladium nanoparticles loaded on activated carbon (Ag NPs-AC and/or Pd NPs-AC) for the removal ofMethylene blue (MB)molecules from aqueous solutions. Following the optimization of the effect of variables (batch method) including pH, contact time, initial dye concentration and Ag NPs-AC and Pd NPs-AC amounts on MB removal method the kinetic and isotherm studies have been carried out. Based on difference in MB contents (using a UV–vis spectrophotometer) before and after MB adsorption the removal percentage was calculated. The sorption processes followed the pseudo-second-order in addition to intraparticle diffusion kinetic models with good correlation coefficient. The equilibrium experimental data well fitted to the Langmuir models with maximum adsorption capacity of 71.4 and 75.4 mg/g for Ag NPs-AC and Pd NPs-AC, respectively. The obtained results showed that both adsorbents due to their high MB adsorption capacity in short equilibrium times are good alternative as low-cost sorbent in wastewater treatments.

مقایسه نانوذرات نقره و پالادیوم بارگذاری شده در کربن فعال برای حذف موثر متیلن آبی: مطالعه سینتیکی و ایزوترم فرآیند حذف

چکیده

هدف از این مطالعه بررسی و مقایسه قابلیت استفاده از نانو ذرات نقره و پالادیوم بارگذاری شده در کربن فعال (Ag NPs-AC و یا Pd NPs-AC) برای حذف مولکولهای متیلن آبی (MB) مولکول از محلولهای آبی است. پس از بهینه سازی اثر متغیر (روش دسته ای) از جمله pH، زمان تماس، غلظت رنگ اولیه و مقادیر نانوذرات نقره-کربن فعال و نانوذرات پالادیوم-کربن فعال بر روش حذفMB ، مطالعات سینتیکی و ایزوترم انجام شده است. بر اساس تفاوت در مقادیر MB (با استفاده از دستگاه اسپکتروفتومتر UV) قبل و بعد از جذب MB درصد حذف محاسبه شد. فرآیندهای جذب علاوه بر مدل­های سینتیکی نفوذ درون ذره ای با ضریب همبستگی خوب، از شبه مرتبه دوم تبعیت می­کند. تعادل داده های تجربی به خوبی به مدل لانگمویر با حداکثر ظرفیت جذب 71.4 و 75.4 میلی گرم برگرم به ترتیب برای نانوذرات نقره-کربن فعال و نانوذرات پالادیوم-کربن فعال برازش شده است. نتایج به دست آمده نشان داد که هر دو جاذب بعلت ظرفیت جذب بالای MB در زمان تعادل کوتاه، جایگزین خوبی به عنوان جاذب های کم هزینه در تصفیه فاضلاب است.

اختصاصی از سورنا فایل Understanding behavioral intention to use a cloud computing classroom: A multiple model comparison approach دانلود با لینک مستقیم و پر سرعت .

Understanding behavioral intention to use a cloud computing classroom: A multiple model comparison approach

ژورنال:Information & Management

سال:November 2015

قیمت اصلی:35.95$

Highlights

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All six theoretical models have good explanatory power of behavioral intention (BI).

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Based on variance explanation, the motivational model (MM) and the technology acceptance model (TAM) have stronger explanatory powers.

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The theory of planned behavior (TPB) and the TAM have larger effect size compared to other theories.

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Perceived usefulness (PU), attitude (ATT), cloud service quality (CSQ), perceived behavior control (PBC), result demonstration (RD), visibility (VIS), and cloud self-efficacy (CSE) are important factors of a unified model.

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Abstract

Cloud computing is an innovative information technology that has been applied to education and has facilitated the development of cloud computing classrooms; however, student behavioral intention (BI) toward cloud computing remains unclear. Most researchers have evaluated, integrated, or compared only few theories to examine user BI. In this study, we tested, compared, and unified six well-known theories, namely service quality (SQ), self-efficacy (SE), the motivational model (MM), the technology acceptance model (TAM), the theory of reasoned action or theory of planned behavior (TRA/TPB), and innovation diffusion theory (IDT), in the context of cloud computing classrooms. This empirical study was conducted using an online survey. The data collected from the samples (n = 478) were analyzed using structural equation modeling. We independently analyzed each theory, by formulating a united model. The analysis yielded three valuable findings. First, all six theoretical models and the united model exhibited adequate explanatory power. Second, variance explanation, Chi-squared statistics, effect size, and predictive relevance results revealed the ranking importance of the theoretical models. Third, the united model provided a comprehensive understanding of the factors that significantly affect the college students’ BI toward a cloud computing classroom. The discussions and implications of this study are critical for researchers and practitioners.

Keywords

• Cloud computing classroom, Innovation, Behavioral intention, Self efficacy (SE),Service quality (SQ), Innovation diffusion theory (IDT)