Yang Fan, Pei Liang, Wang Zhenggang, Duo Jia
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
Key Laboratory of Xinjiang Coal Resources Green Mining (Xinjiang Institute of Engineering), Ministry of Education, Urumqi 830023, China.
Toxics. 2024 Jul 10;12(7):500. doi: 10.3390/toxics12070500.
In order to solve the problem of the low treatment efficiency of wastewater containing heavy metals in mining areas, straw biochar and graphene oxide enhanced external pressure ultrafiltration (SGU) was used to treat wastewater containing high concentrations of Pb. The operation parameters such as pH and temperature were optimized, and the removal efficiency of COD, NH-N, turbidity and Pb via SGU, straw biochar ultrafiltration (SU), ultrafiltration (UF), and conventional treatment (CT) were systematically investigated. The results showed that the pH and temperature of polluted water were 4.8-5.2 and 21-30 °C, respectively, the average removal rates of COD, NH-N, turbidity and Pb by SGU reached 91%, 97%, 98% and 95%, respectively, and the removal effect was better than that of other processes. In addition, under the backwash conditions of clean water, weak acid, and weak alkali, the membrane flux recovered 65%, 88%, and 89% of the new membrane, respectively. This study provides scientific and theoretical support for the advanced treatment of polluted water in mining areas.
为解决矿区含重金属废水处理效率低的问题，采用秸秆生物炭和氧化石墨烯强化外压超滤（SGU）处理高浓度含铅废水。优化了pH值和温度等运行参数，并系统研究了SGU、秸秆生物炭超滤（SU）、超滤（UF）和常规处理（CT）对化学需氧量（COD）、氨氮（NH-N）、浊度和铅的去除效率。结果表明，污水的pH值和温度分别为4.8-5.2和21-30℃，SGU对COD、NH-N、浊度和铅的平均去除率分别达到91%、97%、98%和95%，去除效果优于其他工艺。此外，在清水、弱酸和弱碱的反洗条件下，膜通量分别恢复到新膜的65%、88%和89%。该研究为矿区污水深度处理提供了科学理论支撑。
