title: Bioremediation of agricultural solid waste leachates with diverse species of Cu (II) and Cd (II) by periphyton.
abstract: The aim of this work was to study the bioremediation of agricultural solid waste leachates with high-concentrations of Cu (II) and Cd (II) after washing the wastes with water and Na2EDTA solution (0.2M). Results indicate that Cu (II) and Cd (II) are mainly comprised of Cu2(OH)22+, Cu3(OH)42+, CuOH+, Cu(H2O)4(OH)2, Cd2+and CdOH+in the water-washed leachates and Cu(EDTA)2-, Cu(HEDTA)-, Cd(EDTA)2-and Cd(HEDTA)-in the Na2EDTA-washed leachates. Cu (II) removal efficiency by selected native periphyton from the water- and Na2EDTA-washed leachates were 80.5% and 68.4% respectively, and for Cd (II) it was 57.1% and 64.6%, because the periphyton was able to maintain a stable pH of the leachates and regulate its microbial composition and carbon metabolic capability to acclimate the chemical conditions of the leachates. This study provides a new biomeasure to treat leachates with high-concentration Cu2+and Cd2+, and contribute valuable insights into the relationships between periphyton characteristics and heavy metals.
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008, China; College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Jiali
authors.initials: J
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008, China.
authors.forename: Junzhuo
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
authors.forename: Chenxi
authors.initials: C
authors.lastname: Wu
authors.affiliation: School of Biomedical Sciences, Charles Sturt University, Boorooma St, Wagga Wagga, NSW 2678, Australia.
authors.forename: Philip G
authors.initials: PG
authors.lastname: Kerr
authors.affiliation: School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region.
authors.forename: Po-Keung
authors.initials: PK
authors.lastname: Wong
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008, China. Electronic address: yhwu@issas.ac.cn.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Wu
mesh_terms: D000383:Agriculture; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D003300:Copper / Q000378:metabolism*; D004492:Edetic Acid / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D059013:Microbial Consortia / Q000502:physiology*; D012987:Soil / Q000737:chemistry; D062611:Solid Waste; D014871:Water Microbiology; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D012987:Soil; D062611:Solid Waste; D014874:Water Pollutants, Chemical; D002104:Cadmium; D002244:Carbon; D003300:Copper; D004492:Edetic Acid
keywords: Agricultural solids; Cd(2+); Cu(2+); Leachate; Periphyton; Remediation