Electrochemical lithium recovery and organic pollutant removal from industrial wastewater of a battery recycling plant,Environmental Science: Water Research & Technology

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Electrochemical lithium recovery and organic pollutant removal from industrial wastewater of a battery recycling plant
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1039/c7ew00454k
Seoni Kim _{1,

2,

3,

4} , Jiye Kim _{1,

2,

3,

4} , Seonghwan Kim _{1,

2,

3,

4,

5} , Jaehan Lee _{1,

2,

3,

4,

5} , Jeyong Yoon _{1,

2,

3,

4,

5}

Affiliation

Lithium has become one of the most important elements due to the rapid development of mobile devices and electronics lately. There has been a steep increase in the global demand for lithium, and developing an economic supply of lithium is thereby important for battery industries. This study presents a new method for recovering lithium in wastewater from battery recycling plants, in which a considerable amount of lithium (∼1900 mg L⁻¹) is discarded. There was a significant amount of organic pollutants present in the wastewater (∼300 mg L⁻¹ of dissolved organic carbon), and so to resolve this, we proposed an electrochemical system containing a lithium-recovering electrode (lithium manganese oxide, LMO) and an oxidant-generating electrode (boron-doped diamond, BDD) to simultaneously recover lithium and decompose organic pollutants. Repeated operation of the electrochemical system demonstrated highly efficient and reliable lithium extraction and organic material removal from wastewater. After the lithium recovery system operation, a lithium-rich solution (98.6 mol% lithium among cations) was obtained, and the organic pollutants in the wastewater decreased by 65%. Furthermore, the electrochemical behavior of LMO and BDD was investigated under various operating conditions to provide useful insights into the industrial applications of our LMO/BDD system.

中文翻译：

电池回收厂工业废水中的电化学锂回收和有机污染物去除

由于近来移动设备和电子产品的迅猛发展，锂已成为最重要的元素之一。全球对锂的需求已急剧增加，因此发展锂的经济供应对电池工业很重要。这项研究提出了一种从电池回收厂中回收废水中锂的新方法，该方法丢弃了大量锂（约1900 mg L ^-1）。废水中存在大量有机污染物（约300 mg L ^-1为了解决这个问题，我们提出了一种电化学系统，该系统包含一个锂回收电极（锂锰氧化物，LMO）和一个氧化剂生成电极（掺硼金刚石，BDD），以同时回收锂并分解有机污染物。电化学系统的重复运行证明了高效，可靠的锂提取以及废水中有机物的去除。锂回收系统运行后，获得了富含锂的溶液（阳离子中的锂为98.6 mol％），废水中的有机污染物减少了65％。此外，在各种操作条件下对LMO和BDD的电化学行为进行了研究，以为我们的LMO / BDD系统的工业应用提供有用的见识。

更新日期：2017-11-28

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