title: [Study on phosphorus(P) fixation in the sediment of lake using the clays modified by LaCl3].
abstract: 14 kinds of clay modified by LaCl3 were prepared and their phosphorus(P) fixation was studied. The effect of pH on adsorption rate of P using kaolin modified by LaCl3 and dissolved concentration of La3+ from them were also discussed. The results showed that the fixation rates of P using clay modified by LaCl3 were improved to 52% - 95% from 3% - 14% using unmodified clay. The maximum adsorption rate of P using kaolin modified by LaCl3 was 94.85% on the pH value of 5. Under the condition of pH range from 4 to 8, the P adsorption rate was higher than 80%. When the pH value was higher than 6.5, the dissolved concentration of La3+ from the modified clay was lower than 0.017 8 mg/L.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. wayney@126.com
authors.forename: Xian-Zheng
authors.initials: XZ
authors.lastname: Yuan
authors.forename: Gang
authors.initials: G
authors.lastname: Pan
authors.forename: Bing-Hui
authors.initials: BH
authors.lastname: Tian
authors.forename: Hao
authors.initials: H
authors.lastname: Chen
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D005618:Fresh Water / Q000032:analysis; D019015:Geologic Sediments / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D014877:Water Pollution, Chemical / Q000517:prevention & control
chemical_list: D000538:Aluminum Silicates; D012989:Soil Pollutants; C028521:lanthanum chloride; D010758:Phosphorus; D007811:Lanthanum; D000077215:Clay