Exaggerated arsenic removal efficiency and pH adaptability by adsorption using monodispersed porous pinecone-like magnesium hydroxide
Qiwei Lin,
Wendan Chen,
Fangjie Lin,
Hu Zhu,
Xuesong Wang
Affiliations
Qiwei Lin
Engineering Research Center of Industrial Biocatalysis, Fujian Province University; Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou 350007, China
Wendan Chen
Engineering Research Center of Industrial Biocatalysis, Fujian Province University; Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou 350007, China
Fangjie Lin
Engineering Research Center of Industrial Biocatalysis, Fujian Province University; Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou 350007, China
Hu Zhu
Engineering Research Center of Industrial Biocatalysis, Fujian Province University; Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou 350007, China
Xuesong Wang
Engineering Research Center of Industrial Biocatalysis, Fujian Province University; Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou 350007, China
Arsenic compounds are classified as Class I carcinogens due to their high toxicity to the organism. Also, they are easily accumulated in water bodies, and both H2AsO4− and HAsO42− are present simultaneously and convert to each other in a wide pH range. Based on the strategy of simultaneous removal of protons to immobilize AsO43−, a monodispersed porous pinecone-like Mg(OH)2 (PLMH) was prepared via a facile and environmentally friendly ultrasound-assisted precipitation route for deep As(V) removal. The PLMH presents a porous and stable framework structure formed by crossed lamellae, and the As(V) solution can be completely immersed inside, which gives a ‘surface effect’ inside the microsphere and makes the As(V) capture performance much higher than the general adsorbents by the removal of protons to immobilize AsO43−. In addition, the PLMH has an extremely wide pH applicability range (pH 3–12), special pH effects, and symmetry phenomena. These performances indicate that the PLMH can be a good candidate for the treatment of real arsenic industrial wastewater. HIGHLIGHTS The PLMH exhibits exaggerated adsorption properties for water contaminated with As (945.8 mg·g−1).; The first discovery of interesting pH symmetry of the PLMH in wastewater contaminated with As.; The PLMH can be mass-produced and has great prospects for real wastewater applications.;
