title: Removal of boron and fluoride in wastewater using Mg-Al layered double hydroxide and Mg-Al oxide.
abstract: Mg-Al layered double hydroxide intercalated with NO3-and Mg-Al oxide were found to remove hazardous materials such as B and As, as well as Cl-and SO42-, from artificial and real hot spring wastewater. However, compared with the mixture of Al2(SO4)3and Ca(OH)2, both adsorbents were inferior for the removal of B from real hot spring wastewater. Both adsorbents were also found to remove F-and PO43-from artificial semiconductor plant wastewater. Both adsorbents have the same ability to remove B from landfill wastewater as the mixture of Al2(SO4)3and Ca(OH)2; furthermore, both remove Cl-, Br-, and SO42-. The benefit of Mg-Al layered double hydroxide intercalated with NO3-is that it does not require neutralization after the treatment. Overall, it can be stated that among the materials tested, Mg-Al layered double hydroxide intercalated with NO3-is the most suitable adsorbent for the treatment of hot spring and landfill wastewater.
authors.affiliation: Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan. Electronic address: kameda@env.che.tohoku.ac.jp.
authors.forename: Tomohito
authors.initials: T
authors.lastname: Kameda
authors.affiliation: Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.
authors.forename: Jumpei
authors.initials: J
authors.lastname: Oba
authors.affiliation: Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Yoshioka
mesh_terms: D000536:Aluminum Hydroxide / Q000737:chemistry; D000537:Aluminum Oxide / Q000737:chemistry; D001895:Boron / Q000737:chemistry / Q000302:isolation & purification*; D005459:Fluorides / Q000737:chemistry / Q000302:isolation & purification*; D008277:Magnesium Oxide / Q000737:chemistry; D064091:Waste Disposal Facilities; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D000536:Aluminum Hydroxide; D000537:Aluminum Oxide; D001895:Boron; D005459:Fluorides; D008277:Magnesium Oxide; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Boron; Fluoride; Mg-Al layered double hydroxide; Mg-Al oxide; Removal; Wastewater