Effect of pH on 17 beta-estradiole adsorption by anaerobic granule sludge combined with zero-valent iron

2018 ◽  
Vol 118 ◽  
pp. 135-142
Author(s):  
Bai-Hang Zhao ◽  
Zhan-Zhao Wang ◽  
Jing Zhang ◽  
Jun Li ◽  
Jie-Yi Zhai ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Effect Of Ph ◽  
Anaerobic Granule

scholarly journals Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3127 ◽  
Author(s):  
Fatemeh Rezaei ◽  
Davide Vione
Keyword(s):  
Wastewater Treatment ◽  
Zero Valent Iron ◽  
Heterogeneous Fenton ◽  
Solution Ph ◽  
Water And Wastewater Treatment ◽  
Environmental Friendliness ◽  
Effect Of Ph ◽  
Solid Catalysts ◽  
Alkaline Conditions ◽  
Water And Wastewater

Heterogeneous Fenton processes with solid catalysts have gained much attention for water and wastewater treatment in recent years. In the field of solid catalysts, zero valent iron (ZVI) is among the most applicable due to its stability, activity, pollutant degradation properties and environmental friendliness. The main limitation in the use of ZVI in heterogeneous Fenton systems is due to its deactivation in neutral and alkaline conditions, and Fenton-like processes have been developed to overcome this difficulty. In this review, the effect of solution pH on the ZVI-Fenton performance is discussed. In addition, the pH trend of ZVI efficiency towards contaminants removal is also considered in oxic solutions (i.e., in the presence of dissolved O2 but without H2O2), as well as in magnetic-field assisted Fenton, sono-Fenton, photo-Fenton and microwave-Fenton processes at different pH values. The comparison of the effect of pH on ZVI performance, taking into account both heterogeneous Fenton and different Fenton-like processes, can guide future studies for developing ZVI applications in water and wastewater treatment.

Hydrolysis and acidification of waste activated sludge enhanced by zero valent iron-acid pretreatment: effect of pH

2015 ◽  
Vol 57 (26) ◽  
pp. 12099-12107 ◽  
Author(s):  
Cheng Huang ◽  
Congcong Liu ◽  
Xiuyun Sun ◽  
Jiansheng Li ◽  
Jinyou Shen ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Zero Valent Iron ◽  
Waste Activated Sludge ◽  
Acid Pretreatment ◽  
Effect Of Ph ◽  
Pretreatment Effect

Effect of pH on PCP Remediation by Smectite Supported Pd / Fe

2013 ◽  
Vol 634-638 ◽  
pp. 3071-3074
Author(s):  
Bing Tao Liu ◽  
Guang Yu Zhu ◽  
Jia Yi Pu
Keyword(s):  
Reaction Rate ◽  
Ph Value ◽  
Reaction System ◽  
Reaction Rate Constant ◽  
Zero Valent Iron ◽  
Iron Corrosion ◽  
Effect Of Ph ◽  
The Difference ◽  
Dechlorination Reaction ◽  
Supported Pd

Due to its influence on iron corrosion and involvement in dechlorination reaction, the concentration of H+ is crucial to the reactivity and efficiency of nanosized Pd /Fe. In this study, PCP dechlorination by smectite-templated Pd/Fe was studied and the effect of pH on PCP dechlorination was investigated in detail. The reaction rate constant is critically dependant on the reaction pH over the range 6.0~10.0. The dechlorination rate increases rapidly with decreasing the reaction pH value when the pH is 6.0~8.0. The rate change is up to 3.346 folds with decreasing of per pH unit while it decreases down to 0.3338 when pH is in the range 8.0~10.0. The reductive efficiency of zero-valent iron (ZVI) was further investigated by spiking excess PCP in the reaction system. The maximal reaction efficiency of ZVI for PCP dechlorination attains to 78% when pH is 9.0. The difference between the dechlorination rate and reductive efficiency with respect to reaction pH suggest that ZVI could not be effectively utilized to reduce PCP under acidic condition.

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