Adsorption behavior of Crys tal Violet dye in aqueous solution using Co+2 hectorite composite as adsorbent surface
Article Type:
Research/Original Article (بدون رتبه معتبر)

This s tudy focused on the adsorption behavior of the cationic Crys tal Violet (CV) dye from aqueous solutions using a Co+2‒hectorite composite as an adsorbent surface. The initial and equilibrium CV dye concentrations were determined using a UV-Vis spectrophotometer. The results were discussed and presented for the impacts of pH, primary CV dye concentration, composite dosage, and temperature. The optimum conditions were found for eliminating Crys tal Violet dye from the aqueous solution at a pH 4, ideal temperature 293 K, and 0.5 g L-1 of composite dose. The pseudo-second-order kinetic, intraparticle diffusion analyzed the tes ts’ data and film diffusion models. Each model’s defining features have been identified, and these models were in good agreement and in charge of regulating the adsorption reaction. The adsorption operation was also thermodynamically examined to determine thermodynamic variables such as Gibbs free energy (ΔGo), entropy (ΔSo), activation energy (Ea), and enthalpy (ΔHo). The negative value of Gibbs free energy (ΔGo) and enthalpy (ΔHo) indicated that the adsorption process was a spontaneous and exothermic reaction. While the activation energy (Ea) data which fell within the normal range for physisorption, was discovered to be 22.434 kJ mol-1. This result proved that physical adsorption occurs between the CV dye and the adsorbent surface (Co+2‒hectorite composite).

Analytical Methods in Environmental Chemistry Journal, Volume:6 Issue: 1, Mar 2023
5 to 16  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
In order to view content subscription is required

Personal subscription
Subscribe for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!