Preparation of high‐strength gypsum by crystal regulation of phosphogypsum in nitrate solution DOI
Weijun Peng,

Baolin Xia,

Junwei Sha

et al.

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 19, 2025

Abstract Phosphogypsum (PG) suffers from impurities and low resource utilization, posing significant environmental challenges negatively impacting the phosphorus chemical industry. Herein, technique that combines flotation for PG purification with conversion of purified into high‐strength gypsum using a magnesium nitrate (Mg(NO 3 ) 2 solution under atmospheric conditions was investigated. A “reverse‐direct” successfully removed organic matter quartz PG, making it be an ideal secondary resource. The achieved whiteness 55.4%, CaSO 4 ·2H O content 96.57%, meeting specifications first‐grade outlined in GB/T 23456‐2018 standard. Mg(NO found to facilitate glutaric acid (GA) modified morphology gypsum. optimum excellent mechanical property were conducted at temperature—85°C, fraction—15 wt%, concentration—30 resulting average length 28.6 µm aspect ratio 2.0. mechanism GA selective adsorbed on end faces hemihydrate gypsum, inhibiting crystal growth along c ‐axis. By supplementing appropriate amounts each cycle, sustainable recycling filtrate achieved. Such technology enables clean production high‐value utilization PG.

Language: Английский

Preparation of graphene aerogel with three-dimensional soft layered structure using waste graphite as precursor for efficient removal of Cr(Ⅵ) from wastewater DOI
Ying Zheng, Hong Li, Lei You

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116727 - 116727

Published: April 1, 2025

Language: Английский

Citations

0
Preparation of high‐strength gypsum by crystal regulation of phosphogypsum in nitrate solution DOI
Weijun Peng,

Baolin Xia,

Junwei Sha

et al.

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 19, 2025

Abstract Phosphogypsum (PG) suffers from impurities and low resource utilization, posing significant environmental challenges negatively impacting the phosphorus chemical industry. Herein, technique that combines flotation for PG purification with conversion of purified into high‐strength gypsum using a magnesium nitrate (Mg(NO 3 ) 2 solution under atmospheric conditions was investigated. A “reverse‐direct” successfully removed organic matter quartz PG, making it be an ideal secondary resource. The achieved whiteness 55.4%, CaSO 4 ·2H O content 96.57%, meeting specifications first‐grade outlined in GB/T 23456‐2018 standard. Mg(NO found to facilitate glutaric acid (GA) modified morphology gypsum. optimum excellent mechanical property were conducted at temperature—85°C, fraction—15 wt%, concentration—30 resulting average length 28.6 µm aspect ratio 2.0. mechanism GA selective adsorbed on end faces hemihydrate gypsum, inhibiting crystal growth along c ‐axis. By supplementing appropriate amounts each cycle, sustainable recycling filtrate achieved. Such technology enables clean production high‐value utilization PG.

Language: Английский

Citations

0