Study of the effectiveness of the third generation polyamideamine and polypropylene imine dendrimers in removal of reactive blue 19 dye from aqueous solutions

Abstract

Background: Dye and colored materials cause health risks in water and therefore, must be removed from water supplies and wastewater. The aim of this study was to evaluate the effectiveness of the third generation poly(amidoamine) (PAMAM) and poly (propylene imine) dendrimers (PPI-G3) in the removal of reactive blue 19 (RB19) dye from aqueous solutions and determine the optimum conditions for the removal. Methods: This study was performed in a laboratory and batch scale. In this study, synthetic wastewater was examined with three different concentrations of RB19 (25, 50, and 100 mg/L), different pHs (3, 7, and 10), various amounts of dendrimer (0.4, 0.8, 1.2, and 1.6 g/L), and at different times (15, 30, and 60 minutes) during the adsorption process. The remaining amount of dye was measured by spectrophotometer at 592 nm wavelength. Langmuir and Freundlich isotherms were also tested. Results: The results showed that by increasing the reaction time and adsorbent dosage, the rate of dye removal increased while by increasing the initial dye concentration and pH, the dye removal efficiency was significantly decreased. In this study, with increase of pH from 3 to 10, dye removal efficiency at a concentration of 25 mg/L, decreased from 72% to 20% and 88% to 17% by PAMAM and PPI dendrimers, respectively. Excel software was used for data analysis. Conclusion: Both adsorbents had a good dye removal efficiency, but PPI dendrimer was more effective in removing RB19. Adsorption data followed the Langmuir isotherm.

Synthesis and performance evaluation of chitosan/zinc oxide nanocomposite as a highly efficient adsorbent in the removal of reactive red 198 from water

“…the samples were collected and filtered, and the adsorption rate of each solution was determined by a spectrophotometer. Factors affecting the adsorption process of RR 198 by chitosan and chitosan/ZnO nanocomposite including pH, [2][3][4][5][6][7][8][9][10] reaction temperature (25, 30, 40, 50 C), contact time (20,40,60,80, 100, 120 min), amount of adsorbent (0.1, 0.2, 0.3, 0.4, 0.5, 0.6 g), and initial dye concentration (25, 50, 75, 100 mg/L) were considered.…”

“…One of the characteristics of a good adsorbent is cost-effectiveness, high adsorption potential, and being environmentally friendly. For this reason, natural adsorbents were used (7,9). Polysaccharides and their derivatives such as chitosan have always been of interest to many researchers (10,11).…”

“…For this reason, natural adsorbents were used. [7,9] Polysaccharides and their derivatives such as chitosan have always been of interest to many researchers. [10,11] Chitosan is a natural aminopolysaccharide derived from chitin and its usage as a biosorbent has increased due to its abundance in nature and its low cost compared to commercial adsorbents as well as its excellent chelating behavior.…”

A Comprehensive Review on Cu‐Catalysed Aerobic Oxidation of Amines to Imines

“…They have been widely used for longer time as analytical, anticancer, [26][27][28][29][30][31][32][33] anti-inflammatory, [34,35] polymers [36][37][38][39][40][41][42] and liquid crystalline materials. [43][44][45][46] In industrial [47][48][49][50][51] and commercial synthetic processes, imines actively participate as crucial intermediates in the synthesis of numerous physiologically active N-heterocyclic molecules, [52][53][54] antifungal, antimalarial, antibacterial compounds, etc (Figure 1). [34] This article focuses on Cu-catalysed amine oxidation processes to imine that require O 2 , which is widely available on Earth.…”

Hybrid UV/COP advanced oxidation process using ZnO as a catalyst immobilized on a stone surface for degradation of acid red 18 dye

“…Hence, removal of azo dyes from textile industry wastewater is so necessary. Lately, a lot of physical, chemical and biological methods [5 , 6] such as adsorption [7] , [8] , [9] , [10] , [11] , [12] , [13] , electrocoagulation [14] , [15] , [16] , [17] , activated sludge [18] , photochemical [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] ), oxidation [30] , [31] , [32] , [33] , [34] , trickling filter [35] and membrane processes [36] have used for the azo dyes, organic and inorganic pollutants removal from the environment. However, these methods have some problems [23] such as the toxics production expensive facilities and high maintenance and operation costs.…”