A Novel Pretreatment Method of Lignocellulosic Material as Adsorbent and Kinetic Study of Dye Waste Adsorption

Abstract

Sulphuric acid-modified bagasse has been used as low-cost adsorbent for the removal of methylene blue (MB) dye from aqueous solution. In order to remove organic compounds that contribute to chemical oxygen demand (COD), pretreatment with thorough washing of adsorbent using boiling distilled water was performed instead of conventional washing using distilled water at room temperature only. This has resulted in the highest efficiency of color removal of 99.45% and COD reduction of 99.36% for MB dye solution at pH 9. Effects of initial pH, dye concentration, adsorbent dosage, temperature, and contact time have been studied. The adsorption of MB dye was pH dependent. Langmuir and Freundlich isotherm models were tested on the adsorption data. The kinetic experimental data were analyzed using pseudo-first order, pseudo-second order, and the intraparticle diffusion model in order to examine the adsorption mechanisms. The adsorption process followed the Langmuir isotherm as well as the Freundlich isotherm and pseudosecond-order kinetic model. The process was found to be endothermic in nature.

Lignocellulosic Materials as Dye Adsorbents: Adsorption of Methylene Blue and Congo Red on Brewers’ Spent Grain

“…[12] Lignocellulosic waste materials arising from food and wood industry or agriculture represent a potential alternative to conventional adsorbents. Different adsorbents derived from industrial or agricultural wastes have been successfully used for dye removal from an aqueous solution such as apple pomace, [14,15] peanut hull, [1] sugar bagasse, [16,17] sugar beet waste, [15] barley husk, [18] brewers' spent grain, [19,20] wood sawdust, [15,21] fruit and vegetable peels, [22,11] etc. The main components of lignocellulosic materials responsible for adsorption are polymers: cellulose, hemicellulose and lignin, i.e.…”

Effects of Carbonization Parameters on the COD Reduction of Rhodamine B Dye Aqueous Solutions Using Elaeis guineensis Frond Fiber

“…The response Y (COD reduction of Rhodamine B) is a function of the levels of independent variables: Y= f(A1, A2, A3, A4)+ε (2) where ε is the error observed in the response. The expected response is:…”

“…Activated carbons can be prepared from various precursors with high carbon content and low levels of inorganic compounds [1]. The use of agricultural byproducts such as bagasse [2], cogongrass [3], rice husk [4], sawdust [5] etc. as adsorbent has been gaining attention recently because of availability and abundant of materials, low cost, easy processing, and waste minimizing [6].…”

“…COD is used to measure the total quantity of oxygen consuming substances in the complete chemical breakdown of organic substances in water. High COD concentration in water bodies may signify an oxygen deficiency, and aquatic organisms are consequently repelled [2]. Researchers should not only emphasize on the color removal, but also COD reduction of the dye aqueous solutions.…”

Sugarcane bagasse for the removal of erythrosin B and methylene blue from aqueous waste

“…By selecting proper adsorbent, it is possible to make the adsorption process promising and economically viable for the removal of contaminants (Annadurai et al 2002;Sivaraj et al 2001). Therefore, it is preferable to use low-cost adsorbents such as an industrial waste, natural ores and agricultural by-products (Jain et al 2003;Kumar and Sivanesan 2006;Han et al 2006;Low et al 2011;Sharma et al 2010;Bhattacharya and Sharma 2004;Mall et al 2005;Lakshmi et al 2009;Mohanty et al 2006). In our recently published review article , we have compiled an extensive list of adsorbents obtained from different sources, and this review also reports the optimum processing parameters to get maximum dye removal from effluent water.…”