da Rocha Ferreira Glalber Luiz, Vendruscolo Francielo, Antoniosi Filho Nelson Roberto
School of Agronomy, Federal University of Goiás, P.O., Zip Code 74.690-900, Goiânia, GO, Brazil.
Laboratory of Methods of Extraction and Separation, Institute of Chemistry, Federal University of Goiás, Zip Code 74.690-900, Goiânia, GO, Brazil.
Heliyon. 2019 Mar 29;5(3):e01450. doi: 10.1016/j.heliyon.2019.e01450. eCollection 2019 Mar.
The existing techniques for the removal of heavy metals are expensive and frequently inefficient. Thus the application of biosorbents has arisen as an alternative, this being emergent technology that must be studied and explored, with the aim of promoting better environmental and human life quality. The objective of this study was to verify the capacity of active and inactive fungal biomass in removing Cr(VI) ions by biosorption from synthetic aqueous solutions of these ions at concentrations of 10, 25, 50, 75, 100, 125 and 150 mg L. When using active biomass, the kinetic studies showed that 100% of biosorption was reached from the 25 mg LCr(VI) solution in 360 hours, equivalent to the removal of 169.84 mg g of total Cr. On the other hand the inactive biomass reached 100% of its saturation capacity in 22 minutes for a concentration of 50 mg L of Cr(VI), equivalent to the removal of 368.21 mg g of total Cr. The kinetic study was shown to be highly effective, presenting an efficiencies of times 500 and 750 for the active and inactive biomasses, respectively, when compared to the limit of 0.1 mg L of Cr(VI) for industrial effluents described in CONAMA resolution n° 430/2011.
现有的重金属去除技术成本高昂且效率低下。因此，生物吸附剂的应用作为一种替代方案应运而生，这是一项必须加以研究和探索的新兴技术，旨在提高环境质量和人类生活质量。本研究的目的是验证活性和非活性真菌生物质从浓度为10、25、50、75、100、125和150 mg/L的这些离子的合成水溶液中通过生物吸附去除Cr(VI)离子的能力。使用活性生物质时，动力学研究表明，在360小时内，25 mg/L Cr(VI)溶液的生物吸附率达到100%，相当于去除169.84 mg/g的总铬。另一方面，对于50 mg/L的Cr(VI)浓度，非活性生物质在22分钟内达到其饱和容量的100%，相当于去除368.21 mg/g的总铬。与CONAMA第430/2011号决议中规定的工业废水0.1 mg/L的Cr(VI)限值相比，动力学研究显示活性和非活性生物质的效率分别高达500倍和750倍，效果显著。
