González Ana Julieta, Caimán Carolina, Gorino Natalia, Fortunato María Susana, Radice Marcela, Gómez Carlos, Mujica Carolina, Marquina Lorena, Gallego Alfredo, Korol Sonia Edith
a Cátedra de Salud Pública e Higiene Ambiental, Facultad de Farmacia y Bioquímica , Universidad de Buenos Aires , Buenos Aires , Argentina.
b CONICET , Buenos Aires , Argentina.
Environ Technol. 2018 Nov;39(22):2848-2855. doi: 10.1080/09593330.2017.1367844. Epub 2017 Oct 10.
The aims of this investigation were to evaluate the bacterial resistance to zinc, copper, chromium (VI) and lead in surface water streams from Buenos Aires, Argentina; to select a chromium-resistant strain able to remove the metal in batch process and to evaluate the potential of this strain to remove chromium (VI) in liquid effluents. Bacterial resistance to the metals was evaluated by determining the minimal inhibitory concentration. The kinetic of chromium (VI) removal by one of the resistant strains was studied in nutrient broth with 50 and 100 mg L of the metal, as well as an effluent from an electroplating industry. High resistance to all the metals under study was observed in the bacterial communities of the Matanza-Riachuelo basin. A chromium-resistant strain was isolated and identified as Microbacterium sp. It was able to remove 50 and 100 mg L of Cr (VI) in 36 and 66 h respectively, with efficiency higher than 99%. Experiments with liquid effluents showed the ability of the strain to transform 150 mg L of the metal in 84 h, with efficiency higher than 99%. These results show the potential of this native strain for the treatment of liquid effluents that contain chromium (VI).
本研究的目的是评估阿根廷布宜诺斯艾利斯地表水流中细菌对锌、铜、铬（VI）和铅的抗性；选择一株能够在分批处理中去除金属的耐铬菌株，并评估该菌株去除液体废水中铬（VI）的潜力。通过测定最小抑菌浓度来评估细菌对金属的抗性。在含有50和100 mg/L该金属的营养肉汤以及电镀工业废水中研究了其中一株抗性菌株去除铬（VI）的动力学。在马坦萨 - 里亚丘埃洛河流域的细菌群落中观察到对所有研究金属具有高抗性。分离出一株耐铬菌株并鉴定为微杆菌属。它能够分别在36和66小时内去除50和100 mg/L的Cr（VI），效率高于99%。对液体废水的实验表明，该菌株能够在84小时内转化150 mg/L的该金属，效率高于99%。这些结果表明了这种本地菌株在处理含铬（VI）液体废水方面的潜力。
