Adsorption characteristics of jackfruit leaf powder for the removal of Amido black 10B dye

Abstract

This work presents experimental studies on the adsorption characteristics (% dye removal and sorption capacity) of a low‐cost adsorbent, jackfruit leaf powder (JLP), derived from agricultural waste (jackfruit leaves). The prepared JLP was used as adsorbent to study the effect of various parameters namely initial pH, adsorption time, temperature, agitation speed, JLP loading and initial dye concentration on dye removal efficiency. Then, the optimal process parameters for the dye–adsorbent system were determined. It has been observed that the dye removal efficiency increases with increasing the adsorbent dosage, adsorption time as well as stirrer speed and the optimal values of JLP dosage, adsorption time and stirrer speed were found to be 10 g/L, 5 h and 200 rpm, respectively. On the other hand, the dye removal efficiency decreased with increasing the initial dye concentration as well as temperature, indicating that the adsorption on JLP is exothermic and is effective at low concentrations of dye. The variation in dye removal efficiency with pH did not show any regular trend. A sudden drop in the removal efficiency from a pH of 6 to 8 was noticed. Maximum dye removal was obtained at low pH values (between 2 and 5) indicating the fact that the JLP surface is positively charged. JLP resulted in far better values of adsorption capacity (up to 3.7 mg/g) and dye removal efficiency (>80%). Finally, the data were fitted to various equilibrium and kinetic models. Experimental data matched well with the pseudo‐second‐order kinetics and Freundlich isotherm models. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 461–470, 2015

Biosorption of dye from textile wastewater effluent onto alkali treated dried sunflower seed hull and design of a batch adsorber

“…Dyes are visible 14 to human eye and therefore, a highly objectionable type of 15 pollutant on esthetic grounds. They also interfere with the 16 transmission of light and upset the biological metabolism 17 processes which cause the destruction of aquatic communities 18 present in ecosystem [4]. The textile-dying industry consumes 19 large quantities of water and produces large volumes of 20 wastewater from different steps in the dyeing and finishing 21 processes.…”

“…The higher dye removal rate at the 132 initial stage is due to availability of the larger number of free 133 adsorption sites in the beginning of the adsorption process. 134 However, as the adsorption process proceeds, all the available sites 135 are gradually occupied by the dye species [16,18]. intensity of dye molecules [12].…”

“…intensity of dye molecules [12]. Solution pH has been reported as 146 an important factor on dye biosorption capacity of certain 147 biosorbent [3,16,19,20]. concentration [16,19].…”

“…Solution pH has been reported as 146 an important factor on dye biosorption capacity of certain 147 biosorbent [3,16,19,20]. concentration [16,19]. Astrazon Red onto P. oceanica leaves [7], brilliant red 2-KBP onto 182 modified walnut shell [10], brilliant green onto rice husk ash [12], 183 Methylene blue adsorption onto mango seed powder [15], 184 adsorption of amido black 10B dye on jackfruit leaf powder [16], 185 adsorption of maxillian red onto walnut shell [19], reactive red 186 120 onto C. contraria [22], acid black 1 onto two brown macroalgae 187 S. glaucescens and S. marginatum [23], congo red onto jujube seeds 188 [25], yellow 194, red 357 and black 210 onto chromium tanned 189 leather waste [26].…”

“…The major advantage of adsorption is use of low cost 34 material especially agricultural based biomass. Various biomass 35 have been studied as potential biosorbents such as saw dust cactus 36 fruit peel [3], chitosan [4], saw dust [6], leaves of Posidonia oceanica 37 [7], oil palm empty fruit bunch fibers [8], sugar beet pulp [9], 38 modified walnut shell [10], Pyracantha coccinea berries [11], rice 39 47 husk ash [12,13], eggshell [14], mango seed kernel powder [15] 40 and jackfruit leaf powder [16]. 41 The objective of this work was to investigate the potential of 42 dried sunflower seed hull (DSSH), an agricultural waste, as an 43 adsorbent in the removal of synthetic reactive and direct dyes, 44 from aqueous waste effluent from the textile industry.…”