School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China.
Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing, 100044, People's Republic of China.
Environ Sci Pollut Res Int. 2019 Feb;26(6):5693-5703. doi: 10.1007/s11356-018-3919-5. Epub 2019 Jan 5.
A process combining catalyzed Fe(0)-carbon microelectrolysis (IC-ME) with activated carbon (AC) adsorption was developed for advanced reclaimed water treatment. Simultaneous nitrate reduction and chemical oxygen demand (COD) removal were achieved, and the effects of composite catalyst (CC) addition, AC addition, and initial pH were investigated. The reaction kinetics and reaction mechanisms were calculated and analyzed. The results showed that CC addition could enhance the reduction rate of nitrate and effectively inhibit the production of ammonia. Moreover, AC addition increased the adsorption capacity of biorefractory organic compounds (BROs) and enhanced the degradation of BRO. The reduction of NO-N at different pH values was consistently greater than 96.9%, and NH-N was suppressed by high pH. The presence of CC ensured the reaction rate of IC-ME at high pH. The reaction kinetics orders and constants were calculated. Catalyzed iron scrap (IS)-AC showed much better nitrate reduction and BRO degradation performances than IS-AC and AC. The IC-ME showed great potential for application to nitrate and BRO reduction in reclaimed water.
一种将催化铁（0）-碳微电解（IC-ME）与活性炭（AC）吸附相结合的工艺被开发用于先进的再生水处理。实现了同时去除硝酸盐和化学需氧量（COD），并考察了复合催化剂（CC）的添加、活性炭的添加和初始 pH 的影响。计算和分析了反应动力学和反应机理。结果表明，CC 的添加可以提高硝酸盐的还原速率，并有效地抑制氨的生成。此外，活性炭的添加增加了生物难降解有机化合物（BRO）的吸附能力，并增强了 BRO 的降解。不同 pH 值下的 NO-N 还原率均大于 96.9%，高 pH 值会抑制 NH-N 的生成。CC 的存在保证了 IC-ME 在高 pH 值下的反应速率。计算了反应动力学级数和常数。与 IS-AC 和 AC 相比，催化铁屑（IS）-AC 对硝酸盐和 BRO 的还原性能更好。IC-ME 在再生水中硝酸盐和 BRO 的还原方面具有很大的应用潜力。
