Arsenic removal from water/wastewater using adsorbents—A critical review

https://dr.ntu.edu.sg/bitstream/10356/96770/1/30.%20Application%20of%20Layered%20Double%20Hydroxides%20for%20Removal%20of%20Oxyanions.pdf

Application of layered double hydroxides for removal of oxyanions: A review

Arsenic toxicity, health hazards and removal techniques from water : an overview

Kinetics of adsorption of metal ions on inorganic materials: A review

Arsenic and antimony in water and wastewater: overview of removal techniques with special reference to latest advances in adsorption

Adsorption and removal of arsenic(V) from drinking water by aluminum-loaded Shirasu-zeolite.

The adsorption of Sb(V) ions from aqueous solutions onto commercially available activated alumina (AA) was investigated. AA has a much higher adsorption capacity than presently used adsorbents. Sb(V) ions are likely adsorbed through electrostatic attraction and/or specific adsorption mechanism, while the optimum pH is found in the range of 2.8–4.3. The Sb(V) ions adsorption capacities increase with increasing temperature. The addition of nitrate, acetate, arsenite, chloride, and silicate ions affected Sb(V) ions adsorption only slightly, while the coexisting ascorbate, arsenate, phosphate, sulfate, EDTA, tartrate, and citrate ions substantially depressed Sb(V) ions adsorption.

Adsorption and removal of antimony from aqueous solution by an activated Alumina

A novel adsorbent, aluminium‐loaded Shirasu‐zeolite P1 (A1‐SZP1), has been developed for the removal of arsenate, phosphate, and fluoride ions from aqueous system. The dependence of removal percentage upon aluminium concentration in loading solution, pH, initial concentration, and coexisting anions has been investigated. The rate of adsorption of the anions follows first‐order reaction, the adsorption mode of each anion is of a Freundlich isothermal nature, and the adsorption mechanism is supposed as an ion‐exchange process between these anions and the hydroxide groups on the surface of Al‐SZP1. These anions were also concentrated successfully in a column packed with Al‐SZP1.

Removal of arsenate, phosphate, and fluoride ions by aluminium‐loaded shirasu‐zeolite

A P1 type Shirasu-zeolite (SZP1) was treated with an aluminium sulfate solution, and thus an aluminium-loaded SZP1 (Al-SZP1) was prepared. By use of Al-SZP1 as an adsorbent, the adsorption of As(V) was examined. The Al-SZP1 was superior to an activated alumina and other aluminium-loaded zeolites in terms of the adsorption ability for As(V).

Adsorption of Arsenic(V) by Use of Aluminium-Loaded Shirasu-Zeolites

The leaching of arsenic from coal fly ash NIST‐1633b and NIST‐2689 was tried with various lixiviants. The leaching of arsenic was found to have taken place readily and to be dependent on both the equilibria of dissolution/precipitation and adsorption/desorption in the leaching system. The arsenic leaching intensity was significantly elevated by the use of proper chelating agents, which is supposed to be owing to the formation of metal (aluminium and/or iron)‐chelate complexes followed by an enhanced binding with arsenate ions. The results of the present study show that arsenic oxides are associated well with iron and aluminium oxide deposits on the particle surface of coal fly ash NIST‐1633b. Surface enrichment for arsenic was also examined and confirmed by XPS measurement. The leaching percentages of arsenic on the surface from XPS detection were in good agreement with those in bulk found in the leaching tests.

Yan‐Hua Xu

Papers

Adsorption and removal of arsenic(V) from drinking water by aluminum-loaded Shirasu-zeolite.

Adsorption and removal of antimony from aqueous solution by an activated Alumina

Removal of arsenate, phosphate, and fluoride ions by aluminium‐loaded shirasu‐zeolite

Adsorption of Arsenic(V) by Use of Aluminium-Loaded Shirasu-Zeolites

Leaching of arsenic from coal fly ashes 1. leaching behavior of arsenic and mechanism study