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Transformative Catalysis Purifies Municipal Wastewater of Micropollutants
ACS ES&T Water ( IF 4.8 ) Pub Date : 2021-08-31 , DOI: 10.1021/acsestwater.1c00213
Yogesh Somasundar 1 , Minkyu Park 2 , Kevin D. Daniels 2, 3 , Genoa R. Warner 1 , Alexander D. Ryabov 1 , Shane A. Snyder 2, 4, 5 , Terrence J. Collins 1
Affiliation  

We describe the use of TAML/peroxide to reduce micropollutants (MPs) in Tucson, AZ, secondary municipal wastewater. The laboratory studies establish simple-to-apply MP abatements rivaling ozone in technical performance. The approach rests on the latest-generation TAML catalyst, 2, currently the highest-technical performance H2O2 activator across both chemistry and biology. Thirty-eight MPs were examined with five 2/H2O2 treatments (50 nM 2 with 22.4 ppm H2O2, 100 nM 2 with 11.2 ppm H2O2, 100 nM 2 with 22.4 ppm H2O2, 200 nM 2 with 11.2 ppm H2O2, and 200 nM 2 with 22.4 ppm H2O2) and four ozone treatments (2, 4, 6, and 8 ppm). Satisfactory analytical data were returned for 25 MPs that were monitored kinetically (LC-MS/MS) from 6 min to 6 h. For all 2/H2O2 conditions, decreases in MP concentration had either ceased at 30 min or showed marginal improvements at 1 h remaining constant to 6 h. The highest-performance 2/H2O2 system (200 nM 2 with 22.4 ppm H2O2) outperformed 2 ppm ozone virtually across the board, delivering micropollutant percent reductions (MPPRs) of 26–98% corresponding to performance advantage ratios over 2 ppm ozone of ∼0.9–8. These data indicate that 2 (1 kg at 70 nM) and H2O2 (53.55 kg at 11.2 ppm) would treat the daily wastewater output of 150,000 Europeans [150 L day–1 (population equivalent)−1, 22,500 tons total] in a manner comparable to that of a common ozone administration of 3 ppm, establishing a new approach worthy of further optimization for municipal wastewater MP treatment.

中文翻译:

转化催化净化城市废水中的微量污染物

我们描述了使用 TAML/过氧化物来减少亚利桑那州图森市二级城市废水中的微污染物 (MP)。实验室研究建立了易于应用的 MP 减排,其技术性能可与臭氧相媲美。该方法依赖于最新一代 TAML 催化剂2,这是目前化学和生物学领域技术性能最高的 H 2 O 2活化剂。用五次2 /H 2 O 2处理(50 nM 2与 22.4 ppm H 2 O 2、100 nM 2与 11.2 ppm H 2 O 2、100 nM 222.4 ppm H 2 O 2、200 nM 2 11.2 ppm H 2 O 2和200 nM 2 22.4 ppm H 2 O 2)和四种臭氧处理(2、4、6和8 ppm)。从 6 分钟到 6 小时动态监测 (LC-MS/MS) 的 25 MP 返回了令人满意的分析数据。对于所有2 /H 2 O 2条件,MP 浓度的降低要么在 30 分钟时停止,要么在 1 小时后显示出边际改善,保持不变至 6 小时。最高性能的2 /H 2 O 2系统(200 nM 222.4 ppm H 2 O 2 ) 几乎全面优于 2 ppm 臭氧,提供 26-98% 的微污染物减少百分比 (MPPR),对应于 2 ppm 臭氧的性能优势比约为 0.9-8。这些数据表明2(70 nM 时 1 kg)和 H 2 O 2(11.2 ppm 时 53.55 kg)将处理 150,000 名欧洲人的每日废水排放量 [150 L day –1(人口当量)-1,总共 22,500 吨]以与普通臭氧管理 3 ppm 的方式相媲美的方式,建立了一种值得进一步优化城市污水 MP 处理的新方法。
更新日期:2021-09-10
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