Waste bamboo framework decorated with α-FeOOH nanoneedles for effective arsenic (V/III) removal

Lina Xu; Zhu Shu; Jingyang Song; Tiantian Li; Jun Zhou

doi:10.1016/j.scitotenv.2022.160951

Waste bamboo framework decorated with α-FeOOH nanoneedles for effective arsenic (V/III) removal

Sci Total Environ. 2023 Mar 10:863:160951. doi: 10.1016/j.scitotenv.2022.160951. Epub 2022 Dec 16.

Authors

Lina Xu¹, Zhu Shu², Jingyang Song¹, Tiantian Li³, Jun Zhou⁴

Affiliations

¹ Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China.
² Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China; Hubei Three Gorges Laboratory, 1 Mazongling Road, Yichang 443007, China.
³ College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China.
⁴ Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China; Hubei Three Gorges Laboratory, 1 Mazongling Road, Yichang 443007, China. Electronic address: zhoujun@cug.edu.cn.

PMID: 36528951
DOI: 10.1016/j.scitotenv.2022.160951

Abstract

Arsenic pollution of water is one of the severest environmental challenges for human health, and adsorption is the most often used technique in investigations of selective As removal. However, the development of low-cost and easily recoverable adsorbent for aqueous arsenic adsorption remains a challenge. In this work, the α-FeOOH-decorated monolith bamboo composites (α-FeOOH/MB) were fabricated via directly decorating α-FeOOH nanoneedles on the waste bamboo framework without pre‑carbonization. As expected, the as-prepared α-FeOOH/MB exhibits considerably increased adsorption capacity for aqueous arsenic over pure α-FeOOH nanoneedles, with increases of 1.88 and 1.52 times for As(V) and As(III), respectively. Meanwhile, the α-FeOOH/MB composites exhibit positive reusability (recovering 89.73 % and 80.17 % adsorption capacity for As(V) and As(III) after 5 cycles) and are easy to separate after water treatment. Furthermore, the α-FeOOH/MB composites exhibit high arsenic adsorption selectivity even in the presence of competing anions. Overall, the as-obtained α-FeOOH/MB composites, reuse of waste bamboo, are a kind of favorable candidate for arsenic decontamination in practical application owing to the high adsorption capacity, low-cost and facile separation features.

Keywords: Arsenic adsorption; Monolith; Removal mechanism; Waste bamboo; α-FeOOH nanoneedles.