title: Aqueous Cr (VI) removal by Friedel's salt adsorbent prepared from calcium aluminate-rich cementitious materials.
abstract: This research paper investigated a novel absorbent of calcium aluminate-rich cementitious materials (Friedel's salt adsorbent, FA) for aqueous hexavalent chromium (VI) removal. The adsorption kinetics showed that the maximum adsorption capacities of FA were 3.36, 14.66, and 26.17 mg/g when the initial Cr(VI) concentration was 10, 50, and 100 mg/L, respectively. The adsorption fitted with the pseudo-second-order kinetic model, suggesting the important roles of intercalation in the adsorption process with increasing Cr(VI) concentrations. This Friedel's salt adsorbent is suggested as an adaptive and effective adsorbent for Cr(VI) removal in contaminated groundwater.
authors: a State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Sciences , Beijing 100012 , People's Republic of China.
authors: Yonghai
authors: Y
authors: Jiang
authors: Yu
authors: Y
authors: Yang
authors: Guangren
authors: G
authors: Qian
authors: Hetian
authors: H
authors: Hou
authors: Beidou
authors: B
authors: Xi
authors: Yunfeng
authors: Y
authors: Xu
mesh_terms: D000269:Adhesives / Q000737:chemistry; D000327:Adsorption; D017607:Aluminum Compounds / Q000737:chemistry*; D000537:Aluminum Oxide / Q000737:chemistry*; D002122:Calcium Chloride / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry / Q000302:isolation & purification*; D060587:Groundwater / Q000032:analysis / Q000737:chemistry; D007220:Industrial Waste / Q000517:prevention & control; D014462:Ultrafiltration / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D000269:Adhesives; D017607:Aluminum Compounds; D017610:Calcium Compounds; C586815:Friedel's salt; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D002857:Chromium; C035219:calcium aluminate; D000537:Aluminum Oxide; D002122:Calcium Chloride
keywords: Friedel's salt adsorbent; column test; dissolution–precipitation equilibrium; hexavalent chromium; intercalation