Copper is one of the most toxic heavy metals. In this work, a sampling survey of copper ions in the water of Songhua River flowing through the chemical and living areas of Jilin City was studied. A new bioflocculant from Raoultella planticola was obtained. The investigation of Songhua River flowing through Jilin City shows that the copper concentration is between 0.07 ppb and 0.16 ppb. The bioflocculant supporting graphite oxide (GO) as a bioflocculant inducer used in this study has been utilized in treatment of copper ions in water. GO and bioflocculant infrared radiation (IR) spectrum and zeta potential were studied. Flocculational conditions of copper ion (0.2 ppm) were modeled and optimized using RSM (response surface methodology). Our data showed that flocculation efficiency was over 80%. Significant influencing factors and variables were pH, flocculation time, bioflocculant dosage, and GO inducer which had major impact effects on flocculation efficiency. The highest flocculation efficiency which is 86.01% was achieved at , at 1.62 h and 13.11 mg bioflocculant with 13.11 mg GO as an inducer. However, temperature (A) and GO inducer were significant impact factors on the flocculation efficiency.

中文翻译：

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一种来自Raoultella planticola的新型生物絮凝剂，可增强水中铜离子的去除

铜是毒性最高的重金属之一。在这项工作中，对流经吉林市化学和生活区的松花江水中的铜离子进行了抽样调查。一种来自植物拉乌尔氏菌的新型生物絮凝剂获得了。对流经吉林市的松花江的调查表明，铜的浓度在0.07 ppb至0.16 ppb之间。本研究中使用的支持生物絮凝剂的生物絮凝剂氧化石墨（GO）已用于处理水中的铜离子。研究了GO和生物絮凝剂红外辐射（IR）光谱和Zeta电位。使用RSM（响应表面方法）对铜离子（0.2 ppm）的絮凝条件进行建模和优化。我们的数据表明絮凝效率超过80％。pH，絮凝时间，生物絮凝剂用量，GO诱导剂是影响絮凝效率的重要因素和变量。最高絮凝效率为86.01％，在1.62小时，13.11毫克絮凝剂与13.11毫克GO作为诱导剂。但是，温度（A）和GO诱导剂是影响絮凝效率的重要因素。