Adsorption of Rhodamine b dye onto novel Biochar: Isotherm, Kinetic, thermodynamic study and antibiofilm activity

罗丹明B 吸附 核化学 化学 弗伦德利希方程 零电荷点 吸热过程 比表面积 水银孔隙仪 化学工程 材料科学 有机化学 光催化 多孔性 多孔介质 工程类 催化作用
作者
Lenise Deon Pompeu,Daniel Moro Druzian,Leandro Rodrigues Oviedo,Altevir Rossato Viana,Sérgio Roberto Mortari,Giovani Pavoski,Denise Crocce Romano Espinosa,Bruno Stefanello Vizzotto,Lisete Fernandes,William Leonardo da Silva
出处
期刊:Inorganic Chemistry Communications [Elsevier BV]
卷期号:158: 111509-111509 被引量:5
标识
DOI:10.1016/j.inoche.2023.111509
摘要

Wastewater pollution from organic dyes has been a serious and increasing environmental problem. The present work aims to synthesize and characterize biochar (BC) from shrimp shells for application as a biosorbent in the Rhodamine B (RhB) dye removal. Central Composite Rotational Design (CCRD 22) was used to determination of the ideal condition by adsorption process and BC was characterized by X-ray Diffraction (XDR), N2 porosimetry, zero charge point (pHZCP) and Scanning Electron Microscope (SEM). The toxicity was measured by 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) and 2,7 Dichlorofluorescein Diacetate (DCFH-DA) assay in 293 T, HaCat, and MDBK cell lines, and antibiofilm activity was carried out against P. aeruginosa, A. baumannii, S. epidermidis and E. coli strains. BC showed an irregular morphology (semi-cubic and plates), mesoporosity (Dp ∼ 12.3 nm), pore volume around 0.43 cm3 g−1, the surface area of the 101 m2/g and pHZCP = 7.34. The best experimental fit for the adsorption data was Freundlich isotherm (equilibrium) and pseudo second-order (PSO) (kinetic model) indication a chemisorption process with a maximum adsorption capacity of 350.55 mg g−1 with 72.34 % of RhB removal (pH = 9, T = 298 K and [BC] = 4.5 g/L). Moreover, a thermodynamic study confirmed a spontaneous process (ΔG < 0), endothermic (ΔH = 64.76 kJ mol−1) and with an increase in system randomness indicating structural alterations of the BC surface and the RhB adsorbed (ΔS > 0). Regarding the BC recycling, there was a reduction from 72.10 % (349.38 mg g−1) to 46.32 % (223.38 mg g−1) after V cycles. BC showed biocompatibility (except in the higher concentration) and important antibiofilm activity of 87.5 % (P. aeruginosa), 53.12 % (S. epidermidis), 68.93 % (A. baumannii) and 51.7 % (E. coli) to 125 µg mL−1. Therefore, it was possible to synthesize and characterize an alternative biosorbent from shrimp shell waste with high adsorption capacity, meeting the circular economy for wastewater treatment.
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