Development of sludge-based adsorbents: Preparation, characterization, utilization and its feasibility assessment

Xu, Guoren; Yang, Xin; Spinosa, L.

doi:10.1016/j.jenvman.2014.08.001

Cited by 147 publications

(71 citation statements)

References 86 publications

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“…Acid washing, in this case with HCl, decreases the ash content and improves the surface area and porosity of ACs. The SBAC surface area was lower than for tested commercial carbons, but in the range of other reported ACs produced from agricultural waste and conventional carbon sources such as coal, and higher than reported in studies on sludge-based ACs (Ioannidou and Zabaniotou 2007, Smith et al 2009, Xu et al 2015, Yeganeh et al 2006. Modification of the SBAC considerably decreased the surface area (Table 1), possibly due to destruction of the porous structure caused by oxidation with HNO3 (Yin et al 2007).…”

Section: Characteristics Of the Carbon Materialsmentioning

confidence: 68%

“…The ash content of SBAC (Table 1) was higher than reported content for ACs produced from agricultural wastes, but lower than reported in studies on sludge-based ACs (Ioannidou and Zabaniotou 2007, Xu et al 2015, Yeganeh et al 2006. A low ash content favors surface area and microporosity (Xu et al 2015), hence affecting the adsorption capacity per unit mass. Acid washing, in this case with HCl, decreases the ash content and improves the surface area and porosity of ACs.…”

Section: Characteristics Of the Carbon Materialsmentioning

confidence: 69%

“…Activated carbons exhibit superior adsorption capacity of organic pollutants compared to many other sorbents used for water treatment (Björklund and Li 2015, Boving and Zhang 2004, Nkansah et al 2012. Commonly used adsorbents, including zeolite, peat, fly ash, red mud and clays, usually cost less than 0.2 US $/kg, whereas commercial 17 activated carbons normally cost more than 2.0 US $/kg (Xu et al 2015). The costs of producing SBAC, which depend on factors such as sludge availability and required processing, including energy costs for pyrolysis and drying, have the potential to be on par with, or even lower than, those for the production of commercial activated carbon.…”

Section: Production and Application Of Sbacmentioning

confidence: 99%

“…Sludge has been shown to produce high-quality carbons for adsorption of impurities in water, including metals, phenols and dyes (Smith et al 2009, Xu et al 2015.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, production costs of sludge-based carbon, which depend on factors such as sludge availability and required processing, including energy costs for pyrolysis and drying, have the potential to be on par with, or even lower than, production costs of commercial ACs (Xu et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of organic stormwater pollutants onto activated carbon from sewage sludge

Björklund

2017

Journal of Environmental Management

127

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Adsorption filters have the potential to retain suspended pollutants physically, as well as attracting and chemically attaching dissolved compounds onto the adsorbent. This study investigated the adsorption of eight hydrophobic organic compounds (HOCs) frequently detected in stormwater -including four polycyclic aromatic hydrocarbons (PAHs), two phthalates and two alkylphenols -onto activated carbon produced from domestic sewage sludge. Adsorption was studied using batch tests. Kinetic studies indicated that bulk adsorption of HOCs occurred within 10 min. Sludge-based activated carbon was as efficient as tested commercial carbons for adsorbing HOCs; adsorption capacities ranged from 70 to 2800 µg/g (Cinitial=10-300 µg/L; 15 mg SBAC in 150 mL solution; 24 h contact time) for each HOC. In the batch tests, the adsorption capacity was generally negatively correlated to the compounds' hydrophobicity (log Kow) and positively associated with decreasing molecule size, suggesting that molecular sieving limited adsorption. However, in repeated adsorption tests, where competition between HOCs was more likely to occur, adsorbed pollutant loads exhibited strong positive correlation with log Kow. Sewage sludge as a carbon source for activated carbon has great potential as a sustainable alternative for sludge waste management practices and production of a high-capacity adsorption material.

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Section: Characteristics Of the Carbon Materialsmentioning

confidence: 68%

Section: Characteristics Of the Carbon Materialsmentioning

confidence: 69%

Section: Production and Application Of Sbacmentioning

confidence: 99%

“…Sludge has been shown to produce high-quality carbons for adsorption of impurities in water, including metals, phenols and dyes (Smith et al 2009, Xu et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Adsorption of organic stormwater pollutants onto activated carbon from sewage sludge

Björklund

2017

Journal of Environmental Management

127

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Emerging Techniques for Treatment of Wastewater

Wani,

Malik,

Tantary

et al. 2023

Aquatic Contamination

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Strategies of valorization of sludge from wastewater treatment

Sheng

Zhang

2018

J of Chemical Tech & Biotech

Self Cite

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Sludge is regarded as a potential source to achieve valorization via strategies such as resource recovery, sludge based adsorbents preparation, bioflucculants production, sludge manufacturing construction materials preparation, sludge composting and thermal valorization, which are currently common and effective strategies. Appropriate treatment strategies of sludge are of great importance worldwide for the fast growing population and rapidly increasing waste. This mini review summarized some widely used and effective strategies to achieve sludge valorization based on whether the strategy would utilize or reuse the potential of sludge to obtain valuable product and eliminate secondary pollution. Anaerobic digestion of sludge is perceived as a potentially cost‐effective method to achieve sludge reduction and resource recovery including carbon, nitrogen, phosphorus resource recovery coupled with other technologies. Utilizing sludge as raw material for preparation of valuable products including sludge based adsorbents, bioflocculants and construction materials is another aspect to achieve sludge valorization. Sludge composting and thermal valorization are also introduced in the mini review since the two strategies could also achieve sludge valorization. In addition, the strategies mentioned were discussed and analyzed in the mini review from environmental and economic aspects. © 2017 Society of Chemical Industry

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Development of sludge-based adsorbents: Preparation, characterization, utilization and its feasibility assessment

Cited by 147 publications

References 86 publications

Adsorption of organic stormwater pollutants onto activated carbon from sewage sludge

Adsorption of organic stormwater pollutants onto activated carbon from sewage sludge

Emerging Techniques for Treatment of Wastewater

Strategies of valorization of sludge from wastewater treatment

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