Use of (modified) natural adsorbents for arsenic remediation: A review

Asere, Tsegaye Girma; Stevens, Christian V.; Laing, Gijs Du

doi:10.1016/j.scitotenv.2019.04.237

Cited by 259 publications

(102 citation statements)

References 193 publications

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“…On top of that, adsorption has gained extensive attention in NH 4 + removal due to its low‐cost, high affinity towards NH 4 + , efficiency and simplicity of application, as well as environmental friendliness 7–9 . Processes based on the use of natural, locally available adsorbents are considered to be more accessible for developing countries and have lower investment cost and environmental impact 10 …”

Section: Introductionmentioning

confidence: 99%

Ammonium ion removal using activated zeolite and chitosan

Safie

Yaser

Hilal

2020

Asia-Pacific J Chem Eng

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Studies have previously been done on efficacies of chitosan and zeolite in ammonium ion (NH 4 + ) removal. However, no study compares the adsorption performance of natural zeolite (NZ) and activated NZ (ANZ) with high molecular weight chitosan (HMWC) and low molecular weight chitosan (LMWC).Hence, this study investigates the potentials of NZ, ANZ, LMWC, and HMWC in NH 4 + removal. The characteristics of NZ, ANZ, LMWC, and HMWC such as functional groups, surface morphology, elemental composition, zeta potential, and particle size was also investigated. The deposition of NH 4 + on the surface of NZ and ANZ was confirmed with the absence of nitrogen by the adsorption spectrum of energy dispersive X-ray (EDX) and supported by the presence of an Fourier transform infrared (FTIR) stretching band at 3,500-3,300 cm −1 , as well as broader and less intense bands~1,600 cm −1 after the adsorption for all the adsorbents. The particle size of LMWC, HMWC, NZ, and ANZ were 98, 813, 22,354, and 9,826 nm, respectively. Meanwhile, after the activation process, the composition of O, Si, Al, Fe, Ca, and Na was reduced. NH 4 + batch adsorption was also studied. HMWC, NZ, and ANZ reached adsorption equilibrium at 15 h, meanwhile for LMWC, the equilibrium reached at t = 20 h. The adsorption capacity of LMWC, HMWC, NZ, and ANZ at an initial concentration of 50 mg/L was 0.769, 0.331, 2.162, and 2.937 mg/g, respectively.

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Section: Introductionmentioning

confidence: 99%

Ammonium ion removal using activated zeolite and chitosan

Safie

Yaser

Hilal

2020

Asia-Pacific J Chem Eng

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“…Among various arsenic absorbents, iron oxide is one of the most promising adsorbents because it exhibits selective affinity for arsenic ions and is a very cheap material that is abundant in nature. Therefore, iron oxide may be a very effective alternative for domestic water treatment when used as an adsorbent in a filtration system [12,13]. Much research has been done on iron-oxide-modified media, including iron-oxide-coated zeolite [14], cement [15], carbon nanotubes (CNTs) [16], activated carbon [17], biomasses [18], activated alumina [19], and polymers, for arsenic removal [20].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional, printed water-filtration system for economical, on-site arsenic removal

Kim¹,

Ratri²,

Choe³

et al. 2020

PLoS ONE

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The threat of arsenic contamination to public health, particularly in developing countries, has become a serious problem. Millions of people in their daily lives are still highly dependent on groundwater containing high levels of arsenic, which causes excessive exposure to this toxic element, due to the high cost and lack of water-treatment infrastructures. Therefore, a technique for large-scale treatment of water in rural areas to remove arsenic is needed and should be low-cost, be easily customized, and not rely on electrical power. In this study, in an effort to fulfill those requirements, we introduce a three-dimensional (3D), printed water-filtration system for arsenic removal. Three-dimensional printing can provide a compact, customized filtration system that can fulfill the above-mentioned requirements and that can be made from plastic materials, which are abundant. Armed with the versatility of 3D printing, we were able to design the internal surface areas of filters, after which we modified the surfaces of the 3D, printed filters by using iron (III) oxide as an adsorbent for arsenite. We investigated the effects of the controlled surface area on the flow rate and the deposition of the adsorbent, which are directly related to the adsorption of arsenic. We conducted isotherm studies to quantify the adsorption of arsenic on our 3D, printed filtration system.

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“…can pose severe threats to human health (Jin et al 2018;Sheng et al 2017). In contaminated soil and water, Cd contamination can arise from domestic sewage and atmospheric deposition (Kubier et al 2019), and As contamination mainly arises from the extensive use of arsenic-containing chemicals (such as pesticides and herbicides) in the agriculture system (Asere et al 2019). These two toxic heavy metals can be found in acid mine drainage, smelting industry, fuel combustion, and other sources (Duan and Tan 2013).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of Cd(II) and As(III) from co-contaminated aqueous solution by α-FeOOH modified biochar

Zhu

Irshad

et al. 2020

Biochar

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A novel α-FeOOH modified wheat straw biochar (α-FeOOH@BC) was developed and the findings of the current study showed that α-FeOOH@BC is an efficient material for the simultaneous removal of cations (Cd(II)) and anions (As(III)) from aqueous solutions. The SEM, FTIR, and XRD analysis proved that α-FeOOH@BC was covered by α-FeOOH. In the single adsorption system, the maximum adsorption capacities of α-FeOOH@BC for Cd(II) and As(III) were 62.9 and 78.3 mg/g, respectively. In the dual adsorption system, the maximum adsorption capacities of α-FeOOH@BC for Cd(II) and As(III) dropped to 39.3 and 67.2 mg/g, respectively. The adsorption capacities of Cd(II) and As(III) by α-FeOOH@BC were much higher by BC and α-FeOOH both in single and dual adsorbate system. The adsorption results were well fitted by the Langmuir and pseudo-second-order kinetics models. The Cd(II) and As(III) co-adsorption on α-FeOOH@BC had a competitive effect, and the dominant adsorption mechanisms were co-precipitation and ion exchange. Our study showed that α-FeOOH@BC could be an effective remediation material for Cd(II) and As(III) co-adsorption from aqueous environment.

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Use of (modified) natural adsorbents for arsenic remediation: A review

Cited by 259 publications

References 193 publications

Ammonium ion removal using activated zeolite and chitosan

Ammonium ion removal using activated zeolite and chitosan

Three-dimensional, printed water-filtration system for economical, on-site arsenic removal

Simultaneous removal of Cd(II) and As(III) from co-contaminated aqueous solution by α-FeOOH modified biochar

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