Sorption, mechanism, and behavior of sulfate on various adsorbents: A critical review

Sadeghalvad, Bahareh; Khorshidi, Niyayesh; Azadmehr, Amirreza; Sillanpää, Mika

doi:10.1016/j.chemosphere.2020.128064

Cited by 57 publications

(12 citation statements)

References 127 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…MZ corresponds to a zeolite-based adsorbent of sulfate, acting faster and displaying superior adsorption capacities. It should be noted that its adsorption efficiency is lower than other reported materials for sulfate removal [69,70]. However, many of these materials are synthetic (mainly polymers) and not friendly to the environment, so in this sense the product developed in this work has a composition equivalent to soils and sediments with a marginal amount of polycation, reaching a maximum of 0.1 mg per gram of zeolite.…”

Section: Adsorption Kineticsmentioning

confidence: 91%

Sulfate Kinetics and Adsorption Studies on a Zeolite/Polyammonium Cation Composite for Environmental Remediation

et al. 2021

View full text Add to dashboard Cite

Sulfide mineral mining produces highly sulfate-contaminated wastewater which needs to be treated before disposal. A composite material was made from natural zeolite (NZ) and Superfloc® SC-581, a polyammonium cationic polymer. The resulting modified zeolite (MZ) demonstrated improved capacity for sulfate abatement from wastewater compared to NZ. Above pH 4.0, MZ retained positive surface charge while NZ remained negative. The effect of the ionic strength on the adsorption process was evaluated. Sulfate adsorption capacity was assessed and revealed MZ to be superior to NZ in all cases. Adsorption kinetics reached equilibrium after 10–12 h, with MZ adsorption being twice that of NZ; data fitted a pseudo-second order kinetic model. Adsorption isotherms reflected the high capacity of MZ for sulfate adsorption with maximum of 3.1 mg g−1, while NZ only achieved 1.5 mg g−1. The process corresponds to heterogeneous partially reversible adsorption of ionic species over the solid adsorbent. Langmuir–Freundlich parameters revealed that adsorption over MZ corresponds to an interaction eight times stronger than that on NZ. The sulfate adsorption pattern changes with ionic strength. Taken together, the composite formed between natural zeolite and polyammonium represents an adsorbent that maintains the adsorption capacity of zeolite and proves suitable for anionic species removal. Further prospect considers the testing of the composite with other anionic pollutants (arsenate, phosphate, perchlorate, etc.)

show abstract

Section: Adsorption Kineticsmentioning

confidence: 91%

Sulfate Kinetics and Adsorption Studies on a Zeolite/Polyammonium Cation Composite for Environmental Remediation

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Under the two pH conditions, DHA and coffee DOC have very similar abilities in precipitating S complexes (up to 25%). The formation of Fe/Al (hydroxide)-DOC complexes during the addition of DHA or coffee DOC could provide adsorption sites for sulfate (Tamrat et al 2019, Sadeghalvad et al 2021, which are dominant in AS soil drainage (Green et al 2007) and counted as total S measurements in solution. In addition, the removal of S and Fe, restricts the formation of problematic Fe species such as schwertmannite (Fitzpatrick et al 2017) and akaganeite (Shahabi-Ghahfarokhi et al 2022) in acidic settings.…”

Section: Precipitationmentioning

confidence: 99%

Removal and Potential Recovery of Dissolved Metals from Acid Sulfate Soil Drainage by Spent Coffee-Grounds and Dissolved Organic Carbon

Shahabi-Ghahfarokhi

Rahmati-Abkenar²,

Matson³

et al. 2021

SSRN Journal

View full text Add to dashboard Cite

“…The main sources of sulfate in natural water are chemical weathering and the oxidation processes of sulfur-containing minerals [1]. However, their concentration in water bodies has been increasing over time, due to the discharge of industrial effluents such as those from acid mine drainage, pharmaceutical wastewater, printing and dyeing [2]. Although the sulfate ion is often considered nontoxic, high concentrations of sulfate ions in water can cause an imbalance in the natural sulfur cycle in the ecosystem and endanger human health with prolonged ingestion, causing a laxative effect, dehydration and gastrointestinal irritation [3].…”

Section: Introductionmentioning

confidence: 99%

Efficient Sulfate Adsorption on Modified Adsorbents Prepared from Zea mays Stems

et al. 2021

View full text Add to dashboard Cite

The effect of temperature on the sulfate adsorption capacity of adsorbents prepared from corn stalks (Zea mays) was evaluated. Two bioadsorbents were prepared from biomass: a biochar modified with H2SO4 with mass: volume ratio 1:1 (B 1:1), and cellulose modified with cetyl trimethyl ammonium chloride (CTAC). There were also determined thermodynamic parameters (ΔG°, ΔS° and ΔH°) and it was studied the adsorption kinetics and isotherm. At 25 °C was obtained the highest adsorption capacity of 16.4 and 7.4 mg/g with mass/volume ratio B 1:1 and modified corn (MC) respectively; it was observed an adverse effect of temperature increase on bioadsorbents’ performance. The thermodynamic parameters showed that the adsorption process is exothermic, not spontaneous, and it was given by chemisorption. Adsorption kinetics showed that equilibrium was reached at 420 min and that the pseudo-second-order model adjusted the experimental data with R2 > 0.98 and qe of 16.64 and 7.48 mg/g for B 1:1 as well as MC. The adsorption isotherm showed a good fit to Freundlich’s model when using B 1:1, whereas using MC as adsorbents the data was adjusted by Dubinin-Radushkevich’s model. Zea mays stems are an abundant agricultural residue and are a good source for the preparation of biochar type bioadsorbents as well as the extraction of cellulose, its use is recommended in the removal of sulfates in solution.

show abstract

Sorption, mechanism, and behavior of sulfate on various adsorbents: A critical review

Cited by 57 publications

References 127 publications

Sulfate Kinetics and Adsorption Studies on a Zeolite/Polyammonium Cation Composite for Environmental Remediation

Sulfate Kinetics and Adsorption Studies on a Zeolite/Polyammonium Cation Composite for Environmental Remediation

Removal and Potential Recovery of Dissolved Metals from Acid Sulfate Soil Drainage by Spent Coffee-Grounds and Dissolved Organic Carbon

Efficient Sulfate Adsorption on Modified Adsorbents Prepared from Zea mays Stems

Contact Info

Product

Resources

About