Optimized adsorption onto biosolids‐based activated carbon for tartrazine removal from wastewater. (25th February 2019)

• Record Type: Journal Article
• Authors: Madeira, Carla Suély P.; Zavarize, Danilo G.; Vieira, Gláucia Eliza G.
• Is Part Of: Water environment research. Volume 91:Number 5(2019)
• Page Start: 417
• Page End: 427
• Publication Date: 2019-02-25
• Subjects: alternative adsorbent -- azo dye -- organic pollutant -- RSM -- waste reclamation; Water quality management -- Periodicals; Water -- Purification -- Periodicals; Water -- Pollution -- Periodicals; Water -- Pollution; Water -- Purification; Water quality management; Sewage; Water Pollution; Periodicals; Electronic journals; Periodicals; 628.16
• DOI: 10.1002/wer.1039
• Languages: English
• ISSNs: 1061-4303

Abstract

Abstract: This study investigates optimized tartrazine uptake by activated carbon prepared from biosolids (BBAC). Different tartrazine concentrations (10–20 mg/L), adsorbent dosages (1.0–2.0 g), pH (2.0–4.0), and contact times (60–120 min) were tested. These independent variables formed a 2 4 full factorial experiment arranged as central composite rotative design (CCRD). Response surface methodology (RSM) analyzed the responses of 50 experimental runs. Tartrazine removal efficiency fluctuated between 76.2% and 99.9%. The experimental data were best fitted by a quadratic model ( R 2 > 0.95, p > 0.0001). All variables exerted statistically significant ( p < 0.05) effects on the tartrazine uptake (initial concentration, p = 0.0011; BBAC dosage, p = 0.0004; pH, p < 0.0001; contact time, p < 0.0001). Optimized tartrazine uptake efficiency of 97.4% can happen when variables mutually correlate at 10.1 mg/L of tartrazine concentration, 1.07 g of adsorbent dosage, 2.13 of pH, and 116.9 min of contact time. Practitioner points: Production of biosolids‐based activated carbon (BBAC) is presented. Adsorptive affinity to tartrazine in aqueous solution was experimented. Experimental conditions optimized by Response Surface Methodology.