Jian Zhi-Yu, Chang Yang-Yang, Wang Li-Xin, Liang Jin-Song, Bai Yao-Hui
School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Huan Jing Ke Xue. 2018 Mar 8;39(3):1188-1194. doi: 10.13227/j.hjkx.201707103.
In the process of drinking water treatment, potassium permanganate and iron-manganese oxides are typical pre-oxidation methods that can not only effectively remove organic matters in drinking water, but also reduce the production of disinfection by-products (DBPs). However these two pre-oxidation methods will produce Mn that is genotoxic. In order to solve this problem, a concept was proposed to connect biogenic-manganese oxidation technology after chemical oxidation. The manganese-oxidizing microbe may convert Mn into the bio-manganese oxide, which can further remove the pollutants by its strong oxidative and adsorption capacity to improve water purification. In the simulated contaminated water composed of natural organic tyrosine (Tyr) and synthetic organic 2-Hydroxy-4-Methoxybenzophenone-5-Sulfonic Acid (BP-4), we verified the proposed the concept. Pre-oxidation by potassium permanganate or iron-manganese oxides efficiently removed Tyr, but had negligible effect on BP-4. During this, Mn was generated. In the subsequent biological system, the manganese-oxidizing bacteria sp. QJX-1 could utilize the Tyr for growth and oxidize Mn to Mn oxide. The generated manganese oxides could then effectively remove BP-4. In comparison, the moderate potassium permanganate preoxidation coupled with bio-manganese oxidation had a desirable treatment effect, with 100%, 50%, and 98.9% removals for Tyr, BP-4, and Mn, respectively. Importantly, the study provides a new method for drinking water treatment.
在饮用水处理过程中，高锰酸钾和铁锰氧化物是典型的预氧化方法，它们不仅能有效去除饮用水中的有机物，还能减少消毒副产物（DBPs）的产生。然而，这两种预氧化方法会产生具有遗传毒性的锰。为了解决这个问题，人们提出了一种在化学氧化后连接生物锰氧化技术的概念。锰氧化微生物可以将锰转化为生物锰氧化物，其强大的氧化和吸附能力可以进一步去除污染物，从而提高水的净化效果。在由天然有机酪氨酸（Tyr）和合成有机2-羟基-4-甲氧基二苯甲酮-5-磺酸（BP-4）组成的模拟污染水中，我们验证了这一概念。用高锰酸钾或铁锰氧化物进行预氧化能有效去除酪氨酸，但对BP-4的影响可忽略不计。在此过程中会产生锰。在随后的生物系统中，锰氧化细菌sp. QJX-1可以利用酪氨酸生长，并将锰氧化为锰氧化物。生成的锰氧化物随后可以有效去除BP-4。相比之下，适度的高锰酸钾预氧化与生物锰氧化相结合具有理想的处理效果，酪氨酸、BP-4和锰的去除率分别为100%、50%和98.9%。重要的是，该研究为饮用水处理提供了一种新方法。
