Effective removal of trace arsenic from groundwater by capacitive deionization

Separation and Purification Technology, Год журнала: 2023, Номер 330, С. 125419 - 125419

Опубликована: Ноя. 3, 2023

Язык: Английский

---

A fixed-bed-column study on arsenic removal from water using an in situ-synthesized nanocomposite of magnetite and reduced graphene oxide

Nano-Structures & Nano-Objects, Год журнала: 2025, Номер 41, С. 101431 - 101431

Опубликована: Янв. 30, 2025

Язык: Английский

---

Regenerating Iron-Based Adsorptive Media Used for Removing Arsenic from Water

Technologies, Год журнала: 2023, Номер 11(4), С. 94 - 94

Опубликована: Июль 12, 2023

Of all the substances that can be present in water intended for human consumption, arsenic (As) is one of most toxic. Many treatment technologies used removing As from water, instance, adsorption onto iron media, where commercially available adsorbents are removed and replaced with new media when they exhausted. Since this an expensive operation, work, a novel portable plant regenerating has been developed tested four real case studies Central Italy. The obtained results highlight good efficiency system, which was able, 2019 to 2023, regenerate restore its capability adsorb almost entirely. Indeed, legal threshold value 10 μg/L exceeded, regeneration process performed and, after that, concentration effluent at minimum level investigated studies.

Язык: Английский

---

Removal of High Concentrations of Arsenite from Aqueous Solutions by the Emulsion Liquid Membrane Technique

ChemistrySelect, Год журнала: 2024, Номер 9(8)

Опубликована: Фев. 21, 2024

Abstract As(III) is a dangerous species that contaminates groundwater resources and therefore water purification from this element necessary. In study, the removal of was investigated by emulsion liquid membrane (ELM) technique due to high toxicity levels species. The effect various parameters such as hydrochloric acid arsenic concentration in feed solution, ratio, surfactant type carrier evaluated on separation efficiency. results showed best terms stability efficiency ions di‐(2‐ethylhexyl) phosphoric (D2EHPA), its optimal about 5 % (v/v). addition, paraffin organic solvent performed better than mixture kerosene ions. conditions were obtained at 8 0.1 M HCl concentrations for internal phases, respectively. Also, ratio 1 : 4.5, volume phase (v/v) led achieving maximum This work presents broad perspective removing wastewater carefully examining influencing hazardous through ELM method.

Язык: Английский

---

Use of Iron-Modified Biochar Obtained from Rice Straw as an Adsorbent for Removal of Arsenic from Water

Journal of Hazardous Toxic and Radioactive Waste, Год журнала: 2024, Номер 28(3)

Опубликована: Март 21, 2024

In Northern India, a large quantity of rice stubble is burned in situ agricultural fields after the crop has been harvested, which releases harmful gases and particulate matter into environment. This poses threat to environment health living organisms. Stubble burning could be prevented by utilizing straw directly or indirectly. this study, efforts have made explore use biochar that obtained from pyrolysis as an adsorbent for removal arsenic water, because groundwater worldwide problem. The was chemically modified pyrolyzed obtain iron-modified biochar. characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) analysis. adsorption optimization carried out response surface methodology three parameters (e.g., contact time, dosage, initial concentration). remove 99% water with 989 µg/L at dosage 3.25 g/L. leaching iron tested negligible. addition, disposal exhausted municipal solid waste landfills suggested following toxicity characteristic procedure.

Язык: Английский

---

Sheet nanocomposites of sorghum stalk loaded with hydrated ferric oxide for Cu(Ⅱ) deep removal from water

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(6), С. 114415 - 114415

Опубликована: Окт. 11, 2024

Язык: Английский

---