排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Heavy metal pollution from industrial wastewater is a worldwide environmental issue. Biosorption of heavy metals by using biosorbents derived from various types of biomass has been shown to be effective for the uptake of heavy metal ions. In this study, biosorbents derived from the biomass of a group of marine macroalgae were used for the removal and recovery of heavy metal ions from aqueous solutions. Results indicated that the biosorbents have high uptake capacities and affinities for a number of heavy metal ions. The uptake capacities of the biosorbents were in the range of 1.0 to 1.5mmol·g-1 for divalent heavy metal ions. The kinetics of the uptake process was fast and the process can be used in both batch and fixed-bed operations. It appears that the biosorption process by using biosorbents from marine macroalgae can be an efficient and cost effective technology for the treatment of heavy metal containing wastewater. 相似文献
2.
A model for ph dependent equilibrium of heavy metal biosorption 总被引:1,自引:0,他引:1
Biosorption of heavy metals can be an effective process for the removal and recovery of heavy metal ions from aqueous solutions.
The biomass of marine macro algae has been reported to have high uptake capacities for a number of heavy metal ions and the
uptake capacities are strongly influenced by the value of the solution pH. In this paper, a modified Langmuir model was proposed
for describing the pH dependent biosorption equilibrium and validated with isotherm data obtained from batch experiments and
from the literature. The model assumes that the functional groups for heavy metal interactions are weakly acidic and the uptake
capacities of the biomass are affected through the association and dissociation equilibrium between two apparent ionic forms.
The model equations fitted the experimental data well, which supports the biosorption mechanism proposed. 相似文献
1