Heavy metals–organics mixture pollution is increasingly concerned and simultaneous removal of organic pollutants and heavy metals is becoming significant. In this study, a strain was isolated from the sediment of a tannery effluent outfalls, which can remove o-dichlorobenzene (o-DCB) and Cr(VI) simultaneously. The bacterial isolate was identified as Serratia marcescens by the 16S rRNA gene sequences. The strain removed about 90% of o-DCB and more than 80% of Cr(VI) at the concentration of 1.29 g L⁻¹ o-DCB and 20 mg L⁻¹ Cr(VI). In the presence of concomitant pollutant o-DCB, the optimal pH (8.0) and temperature (30 °C) were determined for Cr(VI) removal. Changes of the bacterial cells and intracellular black Cr(III) sediments were observed by the TEM auxiliary analysis. The results of the FTIR spectroscopy analysis indicated that hydroxyl, amide and polysaccharides were involved in the process of Cr(VI) removal.

中文翻译：

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分离的粘质沙雷氏菌ZD-9同时去除六价铬和邻二氯苯。

重金属-有机混合物污染日益受到关注，同时去除有机污染物和重金属也变得越来越重要。在这项研究中，从制革厂出水口的沉积物中分离出一种菌株，该菌株可以同时去除邻二氯苯（o -DCB）和Cr（VI）。该细菌分离物通过16S rRNA基因序列鉴定为粘质沙雷氏菌。该菌株以1.29 g L ^-1 o -DCB和20 mg L ^-1 Cr（VI）的浓度除去了约90％的o -DCB和超过80％的Cr（VI）。在伴随的污染物的存在Ò -DCB确定了去除Cr（VI）的最佳pH（8.0）和温度（30°C）。通过TEM辅助分析观察细菌细胞和细胞内黑色Cr（III）沉积物的变化。FTIR光谱分析的结果表明，羟基，酰胺和多糖参与了六价铬的去除过程。