Adsorption of heavy metals onto sewage sludge-derived materials

Rozada, F.; Otero, Marta; Morán, Antonio; Garcı́a, Ana

doi:10.1016/j.biortech.2007.12.015

Cited by 188 publications

(87 citation statements)

References 17 publications

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“…Erdem et al (2004) proposed a sorption selectivity sequence of metals in zeolite. Rozada et al (2008) suggested that pyrolyzed sludge and chemically activated sludge showed higher adsorption affinity to Hg than to Pb, followed by Cu and Cr.…”

Section: Resultsmentioning

confidence: 99%

“…All glass bottles were shaken in a reciprocating shaker with a capacity of 200 excursions/min (epm) at 25°C for a contact period of 12 h. At equilibrium, the amounts of target metals adsorbed (q e , mg/g) onto the corresponding soils were found by following mass balance relationship equation (Eq. 2) (Rozada et al 2008): …”

Section: Sorption Isotherm Of the Identified Potential Metal-removingmentioning

confidence: 99%

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Identification of potential soil adsorbent for the removal of hazardous metals from aqueous phase

Bhakta

Munekage

2012

Int. J. Environ. Sci. Technol.

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The present study attempted to identify the efficient hazardous metal-removing sorbent from specific types of soil, upper and middle layer shirasu, shell fossil, tuff, akadama and kanuma soils of Japan by physicochemical and metal (arsenic, cadmium and lead) removal characterizations. The physico-chemical characteristics of soil were evaluated using X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy techniques, whereas metal removal properties of soil were characterized by analyzing removal capacity and sorption kinetics of potential metal-removing soils. The chemical characteristics revealed that all soils are prevalently constituted of silicon dioxide (21.83-78.58 %), aluminum oxide (4.13-38 %) and ferrous oxide (0.835-7.7 %), whereas calcium oxide showed the highest percentage (65.36 %) followed by silicon dioxide (21.83 %) in tuff soil. The results demonstrated that arsenic removal efficiency was higher in elevated aluminum oxide-containing akadama (0.00452 mg/L/g/h) and kanuma (0.00225 mg/L/ g/h) soils, whereas cadmium (0.00634 mg/L/g/h) and lead (0.00693 mg/L/g/h) removal efficiencies were maximum in elevated calcium oxide-containing tuff soil. Physicochemical sorption and ion exchange processes are the metal removal mechanisms. The critical appraisal of three metal removal data also clearly revealed cadmium [ lead [ arsenic order of removal efficiency in different soils, except in tuff and akadama soils followed by lead [ cadmium [ arsenic. It clearly signified that each type of soil had a specific metal adsorption affinity which was regulated by the specific chemical composition. It may be concluded that akadama would be potential arsenicremoving and tuff would be efficient cadmium and leadremoving soil sorbents.

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Section: Resultsmentioning

confidence: 99%

Section: Sorption Isotherm Of the Identified Potential Metal-removingmentioning

confidence: 99%

Identification of potential soil adsorbent for the removal of hazardous metals from aqueous phase

Bhakta

Munekage

2012

Int. J. Environ. Sci. Technol.

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“…In this case, the degree of ionization of the carboxyls of CCS is so small that it loses the electrostatic binding abilities with Cu (II), implying that the mechanism of the adsorption of Cu (II) to the CCS is ion exchange. From the above experimental and analytical results, it can be noted that the adsorption capacity of CCS for Cu (II) (65 mg/g) is signifi cantly higher than that of other sewage sludge-derived absorbents, such as sewage sludge carbon (6.7 mg/g) and sewage sludge carbon chemical activation with ZnCl2 (20.6 mg/g) [24]. The adsorption capacity of CCS is similar to that of commercial cation exchange resins [25,26], indicating that CCS is a promising absorbent for removal of heavy metals from wastewater.…”

Section: Adsorption Isotherm Of Cu (Ii) On Ccsmentioning

confidence: 93%

Preparation and Cu (II) Adsorption Characteristics of Carboxymethyl Cross-Linked Sewage Sludge

Wang

Zhang

2016

Pol. J. Environ. Stud.

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Sewage sludge was cross-linked with epichlorohydrin to increase its mechanical strength and applicability as an absorbent material. We investigated the effect of the conditions of the cross-linking reaction on the mechanical strength and Cu (II) adsorption capacity of epichlorohydrin cross-linking sewage sludge (ECS). Experimental results showed that cross-linking can raise signifi cantly the mechanical strength of sewage sludge. To improve the adsorption capacity of ECS, carboxymethyl cross-linked sewage sludge (CCS) with maximal adsorption capacity (65mg/g) for Cu (II) was synthesized from ECS by using chloroacetic acid as the etherifi cation agent. The experimental results showed that the adsorption properties of CCS for Cu (II) could best be described by the pseudo-second order model and Langmuir model, and the adsorption mechanism was ion exchange. Our data suggest that CCS is a promising absorbent for removal of heavy metals from wastewater.

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“…It affects human health, accumulates in the food chain and causes many ailments. Contact with chromium results in severe health problems such as simple skin irritation and lung carcinoma [31]. Strong exposure to Cr(VI) could cause cancer in the digestive tract and lungs, epigastric pain and nausea.…”

Section: Application Of Magnetic Fe 3 O 4 Based Nanocompositesmentioning

confidence: 99%