摘要
Thermally activated pinecone(TAP) was used for the adsorption of dimethyl trisulfide(DMTS)from aqueous solutions,which was proved to be the main odorous in algae-caused black bloom.The effects of adsorbent dosage,adsorbate concentration and contact time on DMTS biosorption were studied.The TAP produced at 600℃ exhibited a relatively high surface area(519.69 m^2/g) and excellent adsorption capacity.The results show that the adsorption of DMTS was initially fast and that the equilibrium time was6 h.Higher initial DMTS concentrations led to lower removal percentages but higher adsorption capacity.The removal percentage of DMTS increased and the adsorption capacity of TAP decreased with an increase in adsorbent dosage.The adsorption process conforms well to a pseudo-second-order kinetics model.The adsorption of DMTS is more appropriately described by the Freundlich isotherm(R^2=0.996 1) than by the Langmuir isotherm(R^2=0.916 9).The results demonstrate that TAP could be an attractive low-cost adsorbent for removing DMTS from water.
Thermally activated pinecone （TAP） was used for the adsorption of dimethyl trisulfide （DMTS） from aqueous solutions, which was proved to be the main odorous in algae-caused black bloom. The effects of adsorbent dosage, adsorbate concentration and contact time on DMTS biosorption were studied. The TAP produced at 600℃ exhibited a relatively high surface area （519.69 m^2/g） and excellent adsorption capacity. The results show that the adsorption of DMTS was initially fast and that the equilibrium time was 6 h. Higher initial DMTS concentrations led to lower removal percentages but higher adsorption capacity. The removal percentage of DMTS increased and the adsorption capacity of TAP decreased with an increase in adsorbent dosage. The adsorption process conforms well to a pseudo-second-order kinetics model. The adsorption of DMTS is more appropriately described by the Freundlich isotherm （R^2=0.996 1） than by the Langmuir isotherm （R^2=0.916 9）. The results demonstrate that TAP could be an attractive low-cost adsorbent for removing DMTS from water.
基金
Supported by the Taihu Special Project of Water Pollution Control,Jiangsu Province(No.TH2013214)
the National Water Pollution Control and Management Technology Major Project(No.2012ZX07103-005)
the Industry-Academia Cooperation Innovation Fund Project of Jiangsu Province(No.BY2011165)
the Open Foundation of State Key Laboratory of Lake Science and Environment,CAS(No.2014SKL005)
