当前位置： SCI文献检索 > CHEMOSPHERE期刊下所有文献 > Ultrafast and deep removal of arsenic in high-concentration wastewater: A superior bulk adsorbent of porous Fe2O3 nanocubes-impregnated graphene aerogel.

Ultrafast and deep removal of arsenic in high-concentration wastewater: A superior bulk adsorbent of porous Fe2O3 nanocubes-impregnated graphene aerogel.

Abstract：

:Bulk adsorbents for fast and deep removal of arsenic in water is highly demanded for practical treatment process, especially fixed-bed column process. In this study, a superior bulk adsorbent of porous Fe2O3 nanocubes-impregnated porous graphene aerogel (PGA/PFe2O3) is prepared using a simple template engineering. The maximum capacity for As(III) and As(V) reaches as high as 172.27 and 217.34 mg g-1 of Fe2O3, respectively. The adsorption equilibrium times of As(III) and As(V) on PGA/PFe2O3 are only 30 and 5 min, respectively (m/V = 0.5 g L-1, C0 = 5 mg L-1). Significantly, the high concentrations of As(III) and As(V) can be reduced below 10 μg L-1 within only 60 and 5 min, respectively. The aerogel is conducive to fast diffusion of arsenic and porous Fe2O3 nanocubes provide abundant adsorption sites. Moreover, the adsorbent exhibits an outstanding reusability. The adsorbent also shows a strong anti-interference to aquatic environment. A real realgar tailing wastewater (C0 = 3.076 mg L-1 for As(III) and 3.225 mg L-1 for As(V)) can be deep treated (below 10 μg L-1) within 4 h (m/V = 0.6 g L-1). The bulk adsorbent of PGA/PFe2O3 presents a high column treatment capacity of arsenic-containing groundwater (4750 BV for As(III), 5730 BV for As(V)), producing only 12 BV eluent. This work develops a superior bulk adsorbent for large-scale treatment of arsenic-containing wastewater.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Yu X,Wei Y,Liu C,Ma J,Liu H,Wei S,Deng W,Xiang J,Luo S

doi

10.1016/j.chemosphere.2019.01.130

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

258-266

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(19)30139-0

journal_volume

222

pub_type

杂志文章

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