A comparison of alum sludge with peat for aqueous glyphosate removal for maximizing their value for practical use

Yae Wang 1 Baiming Ren 2, 3 Yaqian Zhao 2, 1 Anthony English 2 Martin Cannon 2
1 Lanzhou Jiaotong University
2 UCD - University College Dublin [Dublin]
3 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement
Abstract : This study compares and contrasts the glyphosate removal efficiency of alum sludge (waterworks residue) and Irish peat in aqueous solution. Organic phosphonate of glyphosate aqueous solution was removed in pot tests separately filled with peat and alum sludge, while effluent samples were taken from each pot to analyse the concentration of phosphorus (P) and COD (chemical oxygen demand); physical and chemical analysis for both media before and after use was carried out subsequently. The results show that the P removal capacity of alum sludge was significant (>99%), while the removal capacity of peat was considerably less than 10% after 10 weeks. Both materials significantly reduced the levels of COD, but it was noted that peat had a marginally greater initial P removal capacity (68 ± 22%) and did perform better than alum sludge (57 ± 12%). Moreover, pre-treatment is a crucial step to harness the full potential of peat. Overall, this study provides a scientific clue for sorbents selection when considering alum sludge and peat to maximize their value in practice.
Keywords : adsorption Irish peat organic phosphonate waterworks residues
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Journal articles
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https://hal-mines-albi.archives-ouvertes.fr/hal-01831951
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Friday, July 6, 2018 - 1:32:19 PM
Last modification on : Thursday, August 29, 2019 - 10:32:04 AM

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Yae Wang, Baiming Ren, Yaqian Zhao, Anthony English, Martin Cannon. A comparison of alum sludge with peat for aqueous glyphosate removal for maximizing their value for practical use. Water Science and Technology, IWA Publishing, 2018, 2017 (2), p.450-456. ⟨10.2166/wst.2018.165⟩. ⟨hal-01831951⟩

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