title: Remediation of Cr(VI)-Contaminated Soil Using the Acidified Hydrazine Hydrate.
abstract: Acidified hydrazine hydrate was used to remediate Cr(VI)-contaminated soil. The content of water-soluble Cr(VI) in contaminated soil was 4977.53 mg/kg. The optimal initial pH of hydrazine hydrate solution, soil to solution ratio and molar ratio of Cr(VI) to hydrazine hydrate for remediation of Cr(VI)-contaminated soil were 5.0, 3:1 and 1:3, respectively. Over 99.50 % of water-soluble Cr(VI) in the contaminated soil was reduced at the optimal condition within 30 min. The remediated soil can keep stable within 4 months. Meanwhile the total phosphorus increased from 0.47 to 4.29 g/kg, indicating that using of acidified hydrazine hydrate is an effective method to remediate Cr(VI)-contaminated soil.
authors.affiliation: Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Zhengzhou, 450006, China.
authors.forename: Yameng
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Institute of Natural Resources and Environment, Henan University, Kaifeng, 475004, China.
authors.forename: Fangfang
authors.initials: F
authors.lastname: Li
authors.affiliation: Institute of Natural Resources and Environment, Henan University, Kaifeng, 475004, China.
authors.forename: Yuling
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Institute of Natural Resources and Environment, Henan University, Kaifeng, 475004, China.
authors.forename: Weihua
authors.initials: W
authors.lastname: Yang
authors.affiliation: Institute of Natural Resources and Environment, Henan University, Kaifeng, 475004, China.
authors.forename: Lv
authors.initials: L
authors.lastname: Lv
authors.affiliation: Qinghai Provincial Research and Design Academy of Environmental Sciences, Xining, 810000, China.
authors.forename: Haotian
authors.initials: H
authors.lastname: Xue
authors.affiliation: Key Research Institute of Yellow River Civilization and Sustainable Development and Collaborative Innovation Center on Yellow River Civilization of Henan Province, Henan University, Kaifeng, 475004, China. wangyangyangxyz@163.com.|Institute of Natural Resources and Environment, Henan University, Kaifeng, 475004, China. wangyangyangxyz@163.com.
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Wang
mesh_terms: D002857:Chromium / Q000032:analysis* / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006834:Hydrazines / Q000737:chemistry*; D010758:Phosphorus / Q000032:analysis; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*
chemical_list: D006834:Hydrazines; D012987:Soil; D012989:Soil Pollutants; D002857:Chromium; C074702:chromium hexavalent ion; C029424:hydrazine; D010758:Phosphorus
keywords: Acidified hydrazine hydrate; Cr(VI)-contaminated soil; Soil remediation; Soil stability