Cerium oxide nanoparticle functionalized lignin as a nano-biosorbent for efficient phosphate removal. Issue 3 (8th January 2020)

• Record Type: Journal Article
• Authors: Liu, Xiaohuan; He, Xia; Zhang, Jiantao; Yang, Jiayao; Xiang, Xiaofei; Ma, Zhongqing; Liu, Lina; Zong, Enmin
• Is Part Of: RSC advances. Volume 10:Issue 3(2020)
• Page Start: 1249
• Page End: 1260
• Publication Date: 2020-01-08
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra09986g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : An inexpensive, high stability, and good reusability nano-biosorbent L-NH2 @Ce for efficient phosphate removal was fabricated by a facile method. Abstract : Removing excess phosphorus is a highly effective method to prevent eutrophication in contaminated water. However, the design and preparation of an efficient biosorbent for phosphate capture is still a great challenge. We fabricated a novel, and inexpensive nano-biosorbent, L-NH2 @Ce, by loading cerium oxide nanoparticles (nano-CeO2 ) within the aminated lignin using a facile in situ precipitation approach for efficient phosphate removal. The as-designed nano-biosorbent L-NH2 @Ce exhibited a BET surface area ( S BET ) of 89.8 m 2 g −1, 3 times that of lignin, and a pore volume ( V p ) of 0.23 cm 3 g −1 . Owing to these results, the adsorption capacity of L-NH2 @Ce increased by 14-fold to 27.86 mg g −1 compared with lignin (1.92 mg g −1 ). Moreover, the L-NH2 @Ce can quickly reduce a high phosphate concentration of 10 ppm to well below the discharge standard of 0.5 ppm recommended by the World Health Organization (WHO) for drinking water. Importantly, a study of leaching tests indicated the negligible risk of Ce ion leakage during phosphate adsorption over the wide pH range of 4–9. Moreover, L-NH2 @Ce exhibits good reusability and retains 90% of removal efficiency after two adsorption–desorption cycles. The environmentally benignity of the raw material, the simple preparation process, and the high stability and reusability makes L-NH2 @Ce a promising nano-biosorbent for phosphate removal.