Thomas Maciej, Kozik Violetta, Barbusiński Krzysztof, Sochanik Aleksander, Jampilek Josef, Bąk Andrzej
Chemiqua Water&Wastewater Company, Skawińska 25/1, 31-066 Kraków, Poland.
Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland.
Materials (Basel). 2020 Nov 6;13(21):5017. doi: 10.3390/ma13215017.
Possible use of potassium ferrate (VI) (KFeO) for the treatment of landfill leachate (pH = 8.9, Chemical Oxygen Demand (COD) 770 mg O/L, Total Organic Carbon (TOC) 230 mg/L, Total Nitrogen (Total N) 120 mg/L, Total Phosphorus (Total P) 12 mg/L, Total Coli Count (TCC) 6.8 log CFU/mL (Colony-Forming Unit/mL), Most Probable Number (MPN) of fecal enterococci 4.0 log/100 mL, Total Proteolytic Count (TPC) 4.4 log CFU/mL) to remove COD was investigated. Central Composite Design (CCD) and Response Surface Methodology (RSM) were applied for modelling and optimizing the purification process. Conformity of experimental and predicted data ( = 0.8477, = 0.7462) were verified using Analysis of Variance (ANOVA). Application of KFeO using CCD/RSM allowed to decrease COD, TOC, Total N, Total P, TCC, MPN of fecal enterococci and TPC by 76.2%, 82.6%, 68.3%, 91.6%, 99.0%, 95.8% and 99.3%, respectively, by using KFeO 0.390 g/L, at pH = 2.3 within 25 min. Application of equivalent amount of iron (as FeSO × 7HO and FeCl × 6HO) under the same conditions allowed to diminish COD, TOC, Total N, Total P, TCC, MPN of fecal enterococci and TPC only by 38.1%, 37.0%, 20.8%, 95.8%, 94.4%, 58.2%, 90.8% and 41.6%, 45.7%, 29.2%, 95.8%, 92.1%, 58.2%, 90.0%, respectively. Thus, KFeO could be applied as an environmentally friendly reagent for landfill leachate treatment.
研究了高铁酸钾（KFeO）用于处理垃圾渗滤液（pH = 8.9，化学需氧量（COD）770 mg O/L，总有机碳（TOC）230 mg/L，总氮（Total N）120 mg/L，总磷（Total P）12 mg/L，总大肠菌群数（TCC）6.8 log CFU/mL（菌落形成单位/毫升），粪肠球菌最可能数（MPN）4.0 log/100 mL，总蛋白水解菌数（TPC）4.4 log CFU/mL）以去除COD的可能性。采用中心复合设计（CCD）和响应面方法（RSM）对净化过程进行建模和优化。使用方差分析（ANOVA）验证了实验数据和预测数据的一致性（ = 0.8477， = 0.7462）。通过CCD/RSM应用KFeO，在pH = 2.3、25分钟内使用0.390 g/L的KFeO，可分别使COD、TOC、总氮、总磷、TCC、粪肠球菌MPN和TPC降低76.2%、82.6%、68.3%、91.6%、99.0%、95.8%和99.3%。在相同条件下使用等量的铁（如FeSO × 7HO和FeCl × 6HO）仅能使COD、TOC、总氮、总磷、TCC、粪肠球菌MPN和TPC分别降低38.1%、37.0%、20.8%、95.8%、94.4%、58.2%、90.8%以及41.6%、45.7%、29.2%、95.8%、92.1%、58.2%、90.0%。因此，KFeO可作为一种环保型试剂用于垃圾渗滤液处理。
