Utilization of alum sludge as adsorbent for phosphorus removal in municipal wastewater: A review

Muisa-Zikali, Norah; Nhapi, Innocent; Ruziwa, Walter; Manyuchi, M. M.

doi:10.1016/j.jwpe.2020.101187

Cited by 133 publications

(60 citation statements)

References 105 publications

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“…The pHpzc is directly related to the ash content of the samples: WTS1 is the more alkaline sample because it presented the higher mineral content. WTS2, on other hand, had a more neutral pHpzc, which indicates that WTS2 is more similar to alum sludge [ 57 , 62 ]. According to these results, WTS1 and WTS2 surfaces were positively charged in water solutions with a pH of below 11.29 and 7.46, respectively ( Table 1 ).…”

Section: Resultsmentioning

confidence: 99%

“…The use of WTSs as an adsorbent in WW treatment is related to their high concentration of amorphous aluminium and ferric ions. These ions have a high affinity to phosphors and heavy metals through ion-exchange and complexation mechanisms [ 55 , 56 , 57 , 58 ]. The first report indicating the potential use of WTS containing AC was made by Lee et al [ 58 ].…”

Section: Introductionmentioning

confidence: 99%

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Study of the Potential of Water Treatment Sludges in the Removal of Emerging Pollutants

Dias¹,

Sousa²,

Bernardo

et al. 2021

Molecules

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Presently, water quantity and quality problems persist both in developed and developing countries, and concerns have been raised about the presence of emerging pollutants (EPs) in water. The circular economy provides ways of achieving sustainable resource management that can be implemented in the water sector, such as the reuse of drinking water treatment sludges (WTSs). This study evaluated the potential of WTS containing a high concentration of activated carbon for the removal of two EPs: the steroid hormones 17β-estradiol (E2) and 17α-ethinylestradiol (EE2). To this end, WTSs from two Portuguese water treatment plants (WTPs) were characterised and tested for their hormone adsorbance potential. Both WTSs showed a promising adsorption potential for the two hormones studied due to their textural and chemical properties. For WTS1, the final concentration for both hormones was lower than the limit of quantification (LOQ). As for WTS2, the results for E2 removal were similar to WTS1, although for EE2, the removal efficiency was lower (around 50%). The overall results indicate that this method may lead to new ways of using this erstwhile residue as a possible adsorbent material for the removal of several EPs present in wastewaters or other matrixes, and as such contributing to the achievement of Sustainable Development Goals (SDG) targets.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of the Potential of Water Treatment Sludges in the Removal of Emerging Pollutants

Dias¹,

Sousa²,

Bernardo

et al. 2021

Molecules

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“…The disposal cost in Netherlands stands at a huge sum of US dollar 37-50 million per year while it is US dollar 6.2 million per year in Australia. It is also estimated that the cost of AlS disposal in Ireland will be doubled by the end of the next decade from the present assessment of 15,000-18,000 tons/year of the dried solids, with disposal costs estimated at EUR 2.1 million (US dollar 2.8 million) per year [14][15][16][17][18].…”

Section: Production and Characteristicsmentioning

confidence: 96%

“…A large number of studies have demonstrated AlS' ability and considerable capacity as a low-cost adsorbent for P immobilization [1][2][3]14,17,21,24]. In addition, other elements of contaminants in wastewater have been tested for adsorption by AlS in recent years.…”

Section: Adsorption Of Various Pollutantsmentioning

confidence: 99%

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Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways

Zhao

Xie

et al. 2021

Processes

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Alum sludge (AlS) refers to the inevitable by-product generated during the drinking water purification process, where Al-salt is used as a coagulant in the water industry. It has long been treated as “waste”, while landfill is its major final disposal destination. In fact, AlS is an underutilized material with huge potential for beneficial reuse as a raw material in various wastewater treatment processes. In the last two decades, intensive studies have been conducted worldwide to explore the “science” and practical application of AlS. This paper focuses on the recent developments in the use of AlS that show its strong potential for reuse in wastewater treatment processes. In particular, the review covers the key “science” of the nature and mechanisms of AlS, revealing why AlS has the potential to be a value-added material. In addition, the future focus of research towards the widespread application of AlS as a raw material/product in commercial markets is suggested, which expands the scope for AlS research and development.

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Biochar‐Based Sorbents for Sequestration of Pharmaceutical Compounds: Considering the Main Parameters in the Adsorption Process

Khadir

2021

Applied Water Science

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Utilization of alum sludge as adsorbent for phosphorus removal in municipal wastewater: A review

Cited by 133 publications

References 105 publications

Study of the Potential of Water Treatment Sludges in the Removal of Emerging Pollutants

Study of the Potential of Water Treatment Sludges in the Removal of Emerging Pollutants

Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways

Biochar‐Based Sorbents for Sequestration of Pharmaceutical Compounds: Considering the Main Parameters in the Adsorption Process

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