Effects of aging of ferric-based drinking water sludge on its reactivity for sulfide and phosphate removal

Water Research
Sirajus SalehinIlje Pikaar

Abstract

Recent studies demonstrated the practical potential of multiple beneficial reuse of ferric-rich drinking water sludge (ferric DWS) for sulfide and phosphate removal in wastewater applications. In practice, ferric DWS is often stored on-site for periods ranging from days to several weeks (or even months), which may affect its reuse potential through changes in iron speciation and morphology. In this study, we investigated for the first time the impact of ferric DWS 'aging' time on the iron speciation and morphology and its subsequent impact on its reactivity and overall sulfide and phosphate removal capacity. A series of coagulation tests were conducted to generate ferric DWS of a practically relevant composition by using raw influent water from a full-scale drinking water treatment plant (DWTP). A comparison with ferric DWS from 8 full-scale DWTPs confirmed the similitude. The presence of akaganeite (β-FeOOH) was detected in ferric DWS (through XRD analyses), independent of the DWS storage time. However, the morphology of akaganeite changed over time from a predominant poorly-crystalline phase in 'fresh' DWS (8 ± 0.1% of total Fe) to a highly crystalline phase (76 ± 3% of total Fe) at a sludge aging time of 30 days which was co...Continue Reading

References

Jan 1, 1989·Geochimica Et Cosmochimica Acta·D E Canfield
Oct 24, 2003·Environmental Science & Technology·Prakhar Prakash, Arup K SenGupta
Jan 27, 2005·Environmental Science & Technology·Konstantinos C MakrisThomas A Obreza
Feb 4, 2006·Journal of Colloid and Interface Science·Ramesh ChitrakarTakahiro Hirotsu
Jun 10, 2008·Water Environment Research : a Research Publication of the Water Environment Federation·Asbjørn Haaning NielsenJes Vollertsen
Jun 23, 2009·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Y OkourI El Saliby
Jul 17, 2010·Advances in Colloid and Interface Science·Anu MatilainenMika Sillanpää
Jun 5, 2013·Proceedings of the National Academy of Sciences of the United States of America·Thomas RiedelThorsten Dittmar
Oct 29, 2014·Environmental Science & Technology·Chunmei ChenDonald L Sparks
May 8, 2015·Environmental Science & Technology·Philipp WilfertMark C M van Loosdrecht
Jun 13, 2015·Critical Reviews in Environmental Science and Technology·J KeeleyS J Judd
Nov 2, 2015·Water Research·James KeeleySimon J Judd
Oct 11, 2017·Environmental Science & Technology·Peng LiaoDaniel E Giammar

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Citations

Apr 11, 2021·The Science of the Total Environment·Dileepa RathnayakeArumugam Sathasivan

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