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Small scale photo bioreactor treatment of tannery wastewater, heavy metal biosorption and CO2 sequestration using microalga Chlorella sp.: a biodegradation approach
Applied Water Science ( IF 5.5 ) Pub Date : 2021-06-05 , DOI: 10.1007/s13201-021-01438-w
A. M. Rajalakshmi , T. Silambarasan , R. Dhandapani

Recently, mass production of lipid along with heavy metal reduction is gaining momentum due to their cost-effective and greener approach towards waste water treatment. The purpose of this study is to investigate the small scale photo bioreactor treatment of tannery effluent using Chlorella sp. isolated form Yercaud lake, Tamil Nadu, India. The results showed a significant decrease in the heavy metals content in the tannery effluent after the treatment. Maximum reduction of the heavy metal Chromium (Cr) of 10.92 mg L−1 was recorded, followed by Cobalt (Co)-7.37 mg L−1, Nickel (Ni)-9.15 mg L−1, Cadmium (Cd)-8.48 mg L−1, Lead (Pb)-12.54 mg L−1, Zinc (Zn)-11.56 mg L−1 and Copper (Cu)-10.71 mg L−1 at the end of the 20th day of treatment. The microalgae, Chlorella sp. was analyzed for their biosorption ability and the maximum biosorption capacity (qmax) rate against heavy metals was 81.36, 70.53, 82.15, 63.29, 58.92, 83.43, 64.83 µg L−1 for Cr, Pb, Ni, Cd, Co, Zn, and Cu respectively. It matched with the Langmuir and Freundlich kinetics models. The maximum CO2 utilization was found to be 60.50% and maximum concentration of lipid, carbohydrate and protein was found to be 0.95 g L−1, 250 µg mL−1 and 160 µg mL−1, respectively. The presence of various groups such as hydroxyl, alkyl, carbonyl and carboxylic acids was confirmed using Fourier transform infrared analysis. Thus, the isolated microalgae showed good biosorption ability towards the various heavy metal pollutants from tannery waste water.



中文翻译:

使用微藻小球藻的小型光生物反应器处理制革废水、重金属生物吸附和 CO2 封存:一种生物降解方法

最近,由于其具有成本效益和更环保的废水处理方法,脂质的大规模生产以及重金属的减少正在获得动力。本研究的目的是研究使用小球藻对制革废水进行小规模光生物反应器处理。孤立的形式 Yarcaud 湖,泰米尔纳德邦,印度。结果表明,处理后制革废水中的重金属含量显着降低。记录到重金属铬(Cr) 的最大减少量为 10.92 mg L -1,其次是钴 (Co)-7.37 mg L -1、镍 (Ni)-9.15 mg L -1、镉 (Cd)-8.48 mg L -1、铅 (Pb)-12.54 mg L -1、锌 (Zn)-11.56 mg L -1和铜 (Cu)-10.71 mg L -1在治疗的第 20 天结束时。微藻,小球藻。分析了它们的生物吸附能力,对重金属的最大生物吸附能力 (qmax) 率分别为 81.36、70.53、82.15、63.29、58.92、83.43、64.83 µg L -1对 Cr、Pb、Ni、Cd 和 Co、Zn分别为铜。它与 Langmuir 和 Freundlich 动力学模型相匹配。发现最大 CO 2利用率为 60.50%,发现脂质、碳水化合物和蛋白质的最大浓度为 0.95 g L -1、250 µg mL -1和 160 µg mL -1, 分别。使用傅里叶变换红外分析证实了各种基团的存在,例如羟基、烷基、羰基和羧酸。因此,分离出的微藻对制革废水中的各种重金属污染物表现出良好的生物吸附能力。

更新日期:2021-06-05
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