Biosorption of Pb(II),Cu(II) and Cd(II) on biomass of the different activated sludge
  • 【摘要】

    The biosorption of different ions metals (Pb2+ Cu2+ and Cd2+) on the different types sludge was investigated. Biomass of digested sludge and resting sludge can be easily applied as a cheap bioadsorben... 展开>>The biosorption of different ions metals (Pb2+ Cu2+ and Cd2+) on the different types sludge was investigated. Biomass of digested sludge and resting sludge can be easily applied as a cheap bioadsorbent for heavy metal ions such as Cd2+, Cu2+ and Pb2+. Langmuir model was found to fit the experimental adsorption and desorption data of the heavy metal on to the biomass of sludge. That has the competition uptake between the difference metal with another when the adsorption system has the di-metal, and tri-metal combine. The maximal adsorption capacity of (each g DW) resting sludge was nearly 0.517 mmol Pb2+; 0.552 mmol Cu2+; g 0.389 mmol Cd2+, whereas, the maximal adsorption capacity of the digested sludge was 0.478 mmol Pb2+, 0.43 mmol Cu2+ and 0.549 mmol Cd2+. In the absorption system, it was found that, di-metal combine such as (Cu-Cd), (Pb-Cd), and (Cu-Pb), the metal uptake Cu2+ ≈ 3Cd2+, Pb2+ >3 Cd2+, and Cu2+ ≈ Pb2+ respectively. When tri-metal Cu-Cd-Pb combines the number of complex formation varies in the following order: Pb2+> Cu2+ >Cd2+The biosorption of different ions metals (Pb2+ Cu2+ and Cd2+) on the different types sludge was investigated. Biomass of digested sludge and resting sludge can be easily applied as a cheap bioadsorbent for heavy metal ions such as Cd2+, Cu2+ and Pb2+. Langmuir model was found to fit the experimental adsorption and desorption data of the heavy metal on to the biomass of sludge. That has the competition uptake between the difference metal with another when the adsorption system has the di-metal, and tri-metal combine. The maximal adsorption capacity of (each g DW) resting sludge was nearly 0.517 mmol Pb2+; 0.552 mmol Cu2+; g 0.389 mmol Cd2+, whereas, the maximal adsorption capacity of the digested sludge was 0.478 mmol Pb2+, 0.43 mmol Cu2+ and 0.549 mmol Cd2+. In the absorption system, it was found that, di-metal combine such as (Cu-Cd), (Pb-Cd), and (Cu-Pb), the metal uptake Cu2+ ≈ 3Cd2+, Pb2+ >3 Cd2+, and Cu2+ ≈ Pb2+ respectively. When tri-metal Cu-Cd-Pb combines the number of complex formation varies in the following order: Pb2+> Cu2+ >Cd2+EPS was extracted by sonication method. humic substance were greater than protein and polysaccharide for digested sludge, on the contrary, for resting sludge the protein is greater than humic. The ratio PN/PS varies from 1.25 to 2.7, the ratio PN/PS highest for resting sludge. Affinity absorption of Cu2+ and Pb2+ was higher than Cd2+ may be that have the competition metal uptake with functional groups such as hydroxyl, carbonyl, amide on the biomass surface of the sludge. 收起<<

  • 【作者】

    YANG Min  SUN Wei Qing  NING Ping  HU Xue Wei  NGUYEN Dinh Trung 

  • 【作者单位】

    Kunming

  • 【会议名称】

    第五届全国博士生会议暨环境科学与工程新理论、新技术学术研讨会

  • 【会议时间】

    2011-10-20

  • 【会议地点】

    北京

  • 【主办单位】

    中国环境科学学会   清华大学

  • 【语种】

    chi

  • 【关键词】

    Activated sludge  Biosorption  EPS  Sorption isotherm  Lead  Copper  Cadmium.