Effect of particle size of drinking-water treatment residuals on the sorption of arsenic in the presence of competing ions

Caporale, Antonio Giandonato; Punamiya, Pravin; Pigna, Massimo; Violante, A.; Sarkar, Dibyendu

doi:10.1016/j.jhazmat.2013.06.023

Cited by 67 publications

(40 citation statements)

References 33 publications

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“…It was shown that the specific surface area of EDCMSM (6.83 m 2 /g) was about 10 times as that of EDCMM (0.70 m 2 /g). The adsorbent with higher surface area had more high affinity sites for heavy metal ions, which lead to faster adsorption rate and higher adsorption capacity [29]. Meanwhile, the increase of carboxyl groups on adsorbent could also enhance the removal of Pb 2+ by electrostatic interaction and chelation [23].…”

Section: Effect Of Contact Time On the Adsorption And The Kinetic Stumentioning

confidence: 99%

“…Chitosan particles are widely used in the field of heavy metal removal [28]. The adsorbent with smaller particle is reported to have higher adsorption capacity due to its higher specific surface area [29]. Submicroparticles, with grain sizes ranging from 100 nm to 1.0 m, have shown excellent performance as a potential catalyst for its high surface area [30].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and characterization of carboxyl-functionalized chitosan magnetic microspheres and submicrospheres for Pb2+ removal

Dang

Liu

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Effect Of Contact Time On the Adsorption And The Kinetic Stumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of carboxyl-functionalized chitosan magnetic microspheres and submicrospheres for Pb2+ removal

Dang

Liu

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Moreover, conclusive prior studies have demonstrated that the smaller fraction of WTR greatly influences its active surface area and leads to increase its adsorption capacity [12][13][14]. Recently, Elkhatib et al [13] developed a method to produce nanoparticles sorbent from water treatment residues using precision milling.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Novel Water Treatment Residual Nanoparticles as a Sorbent for Arsenic Removal

Elkhatib

Mahdy

Sherif

et al. 2015

Journal of Nanomaterials

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A novel sorbent, water treatment residual nanoparticles (nWTR), was synthesized and used to remove As(V) from water solutions. The kinetics and equilibrium of As(V) adsorption by nWTR were evaluated. The kinetic data for nWTR at 3 different pH values indicate that As(V) sorption is biphasic, is favored at low pH values, and followed the power function and first-order kinetics models fit. The results of the batch adsorption study showed that nWTR was effective in As(V) removal and its removal capability was 16 times higher than that of bulk WTR. Fourier transmission infrared (FTIR), SEM-EDX spectra, and As fractionation results indicate the crucial role of surface hydroxyl groups in As retention onto nWTR and the high capability of nWTR to immobilize As(V). The stability of As-nWTR surface complexes is suggested as less than 2% of adsorbed As(V) was released from nWTR after 4 consecutive desorption cycles.

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“…Biochars pyrolyzed from waste biomass (agricultural residues, animal manure, and forestry waste) and carbonaceous materials (compost, lignite, and humus) were less successful for immobilizing oxyanions such as As(III), As(V), and Cr(VI), in spite of their strong binding affinity toward cationic trace metals [e.g., Cu(II), Pb(II)] via metal complexation with O‐containing functional groups (carboxyl, hydroxyl, and phenol groups) (Ok et al, 2011; Uchimiya et al, 2011; Olds et al, 2013; Jiménez‐Cedillo et al, 2013; Tsang et al, 2014). Previous studies also suggested the addition of Fe‐ and Al‐hydroxide‐containing materials, such as water treatment residuals (Nielsen et al, 2011; Caporale et al, 2013b), industrial wastewater sludge (Iqbal et al, 2012; Tsang et al, 2013b), and coal fly ash (Wang and Tsang, 2013; Tsang et al, 2014). Therefore, sludge‐derived biochar (SDBC) is unique as a potentially effective sorbent for these oxyanions because sewage sludge itself comprises a large amount of mineral colloids and inorganic coagulants from wastewater treatment.…”

mentioning

confidence: 99%

Sludge-Derived Biochar for Arsenic(III) Immobilization: Effects of Solution Chemistry on Sorption Behavior

Zhang

Zheng

et al. 2015

J. Environ. Qual.

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Recycling sewage sludge by pyrolysis has attracted increasing attention for pollutant removal from wastewater and soils. This study scrutinized As(III) sorption behavior on sludge-derived biochar (SDBC) under different pyrolysis conditions and solution chemistry. The SDBC pyrolyzed at a higher temperature showed a lower As(III) sorption capacity and increasingly nonlinear isotherm due to loss of surface sites and deoxygenation-dehydrogenation. The Langmuir sorption capacity on SDBC (3.08-6.04 mg g) was comparable to other waste-derived sorbents, with the highest As(III) sorption on SDBC pyrolyzed at 400°C for 2 h. The As(III) sorption kinetics best fit with the pseudo-second-order equation, thus suggesting the significance of the availability of surface sites and initial concentration. Sorption of As(III) was faster than that of Cr(VI) but slower than that of Pb(II), which was attributed to their differences in molar volume (correlated to diffusion coefficients) and sorption mechanisms. The X-ray photoelectron spectra revealed an increase of oxide oxygen (O) with a decrease of sorbed water, indicative of ligand exchange with hydroxyl groups on SDBC surfaces. The As(III) sorption was not pH dependent in acidic-neutral range (pH < 8) due to the buffering capacity and surface characteristics of the SDBC; however, sorption was promoted by increasing pH in the alkaline range (pH > 8) because of As(III) speciation in solution. An increasing ionic strength (0.001-0.1 mol L) facilitated As(III) sorption, indicating the predominance of ligand exchange over electrostatic interactions, while high concentrations (0.1 mol L) of competing anions (fluoride, sulfate, carbonate, and phosphate) inhibited As(III) sorption. These results suggest that SDBC is applicable for As(III) immobilization in most environmentally relevant conditions.

show abstract

Effect of particle size of drinking-water treatment residuals on the sorption of arsenic in the presence of competing ions

Cited by 67 publications

References 33 publications

Preparation and characterization of carboxyl-functionalized chitosan magnetic microspheres and submicrospheres for Pb2+ removal

Preparation and characterization of carboxyl-functionalized chitosan magnetic microspheres and submicrospheres for Pb2+ removal

Evaluation of a Novel Water Treatment Residual Nanoparticles as a Sorbent for Arsenic Removal

Sludge-Derived Biochar for Arsenic(III) Immobilization: Effects of Solution Chemistry on Sorption Behavior

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