Removal of Brilliant Green and Crystal violet from Mono- and Bi-component Aqueous Solutions Using NaOH-modified Walnut Shell
نویسندگان
چکیده مقاله:
In the present work, the simultaneous determination of Brilliant green (BG) and Crystal violet (CV) dyes with overlapped absorption spectra in binary mixture solution, was carreid out using the partial least squares (PLS) and direct ortogonal signal correction-partial least squares (DOSC-PLS) methods. The results obtained indicate that by applying DOSC on the calibration and prediction data for each dye, the prediction errors are significantly minimized. Walnut shell, as an abundant lignocellulosic agricultural waste, was modified using NaOH, and subsequently characterized by the Fourier transform-infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and BET techniques. The potential application of the prepared adsorbent for the removal of the cited dyes was investigated. The effects of the experimental parameters such as the initial pH, adsorbent dosage, initial dye concentration, and contact time on the adsorption efficiency in the single solutions and their binary mixture are studied. The optimum experimental conditions were found to be 0.8 g/L of the adsorbent at room temperature, pH 7.0, and a contact time of 13 minutes. These advantages make it appropriate for dye removal. The analysis data shows that the Langmuire isotherm can satisfactorily explain the equilibrium data. The maximum adsorption capacity (qm) for BG and CV in their single solutions was found to be 146.40 and 123.2 mg/g, respectively, whereas these values for their binary mixture were 79.07 and 96.01 mg/g, respectively. The exhausted NMWNS was regenerated using a dish-washing liquid and reused for removal of the cited dye species from aqueous solutions.
منابع مشابه
Adsorption of Crystal Violet Dye from Aqueous Solutions onto Low-Cost Untreated and NaOH Treated Almond Shell
In the present study, comparative batch adsorption of basic dye namely Crystal Violet (CV) using the almond shell as an adsorbent in untreated form and activated with sodium hydroxide was carried out in search of optimum adsorption conditions. The operation parameters investigated was contact time (10 to 80 min), initial dye concentrations (40-240 mg/L), temperature, (20-5...
متن کاملFluoride Removal from Aqueous Solutions by NaOH-Modified Eucalyptus Leaves
Introduction: Fluoride (F) and its compounds are widely used in industries in which fluoride overdose leads to various detrimental diseases. In this study the effect of NaOH-modified Eucalyptus leaves on fluoride removal from aqueous solutions as a natural adsorbent was investigated. Materials and Methods: The focus of this study was on the effects of parameters such as pH (2-12), initial conc...
متن کاملRemoval of Crystal violet Dye from Aqueous Solution Using Surfactant Modified NiFe2O4 as Nanoadsorbent; Isotherms, Thermodynamics and kinetics Studies
The removal of crystal violet from aqueous solution by NiFe2O4 magnetic nanoparticles treated with sodium dodecyl sulfate was investigated. The modified magnetic nanoparticles were prepared by chemical reaction of a mixture of Ni+2 and Fe+3 ions mixture in aqueous solution at the presence of ammonia and then sodium dodecyl sulfate was utilized as an ionic surfactant to modified the obtained mag...
متن کاملTreatment of Wastewater Containing Crystal Violet Using Walnut Shell
Crystal violet (CV) was removed from aqueous solutions using walnut shell (WS) as an adsorbent. The effect of initial ph, contact time, adsorbent level and temperature on CV adsorption, were studied in batch mode. The results indicated that both the Langmuir and the Freundlich equations effectively described the adsorption equilibrium. A pseudo second-order kinetics provided a perfect fit for t...
متن کاملRemoval of methylene blue from aqueous solutions using modified clay
Introduction: Discharging of industrial colored wastewaters especially into aqueous environments can cause adverse effects on aquatic life due to their toxic natures. In this study, montmorillonite modified by hexadecyltrimethyl ammonium bromide (HDTMA-Mt) was used for the adsorption of methylene blue (MB). Materials and Methods: The influence of surfactant loading rate, contact time, pH, adso...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ذخیره در منابع من قبلا به منابع من ذحیره شده{@ msg_add @}
عنوان ژورنال
دوره 5 شماره 1
صفحات 95- 114
تاریخ انتشار 2018-06-01
با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023