Garlic peel,as the raw material,was modified by loading with zirconium(IV),exhibiting quite good uptaking behaviour for fluoride anion.The adsorption experiments were carried out in batch shaking vessels,and the proce...Garlic peel,as the raw material,was modified by loading with zirconium(IV),exhibiting quite good uptaking behaviour for fluoride anion.The adsorption experiments were carried out in batch shaking vessels,and the process was strongly dependent on the pH value.The adsorption fits Langmuir model well,and the maximum adsorption capacities at equilibrium pH 2 and 6 are evaluated to be 1.10 and 0.89 mol(fluoride)/kg of Zr-loaded garlic peel gel,respectively.The evaluation of effects of coexisting anions such as nitrate,sulfate and phosphate shows that nitrate and sulfate have no negative effect on the adsorption of fluoride,while phosphate has a little effect.Adsorption kinetics of fluoride is well described by pseudo-second-order rate equation,and the corresponding adsorption rate constant is calculated to be 3.25×10?3 g/(mg·min).展开更多
Phytoremediation shows promise as an alternative low-cost to most remediation methods. This study evaluated the germination of six crops, including four mutant lines of barley (Hordium vulgate L.) (1-9-3, 150-2-3, ...Phytoremediation shows promise as an alternative low-cost to most remediation methods. This study evaluated the germination of six crops, including four mutant lines of barley (Hordium vulgate L.) (1-9-3, 150-2-3, 1-1-200 and 150-1-5), wheat (Triticum aestivum L.) and garden cress (Lipidium sativum L.). This experiment was conducted in laboratory at room temperature. Oil extracted from crude oil contaminated soil was added to sand used in different concentrations (0%, 2%, 4%, 6%, 8% and 10%). 10 seeds of each crop were sown in ptri-dishes with different treatments separately. For Each treatment four replicates were used in completely randomized design, germination percent was calculated, after one week, shoot and root length were measured. Data were statistically analyzed using MINTAB version 12. The results show that barley mutant line (150-2-3) was significantly different from other entries in germination percent, shoot and root length except mutant line 150-1-5 in germination percent. Results demonstrated that the mutant line 150-2-3 was promising to remediate crude oil contaminated soil.展开更多
基金Project(11140065) supported by Research Program for Returned Oversea Scholars of China
文摘Garlic peel,as the raw material,was modified by loading with zirconium(IV),exhibiting quite good uptaking behaviour for fluoride anion.The adsorption experiments were carried out in batch shaking vessels,and the process was strongly dependent on the pH value.The adsorption fits Langmuir model well,and the maximum adsorption capacities at equilibrium pH 2 and 6 are evaluated to be 1.10 and 0.89 mol(fluoride)/kg of Zr-loaded garlic peel gel,respectively.The evaluation of effects of coexisting anions such as nitrate,sulfate and phosphate shows that nitrate and sulfate have no negative effect on the adsorption of fluoride,while phosphate has a little effect.Adsorption kinetics of fluoride is well described by pseudo-second-order rate equation,and the corresponding adsorption rate constant is calculated to be 3.25×10?3 g/(mg·min).
文摘Phytoremediation shows promise as an alternative low-cost to most remediation methods. This study evaluated the germination of six crops, including four mutant lines of barley (Hordium vulgate L.) (1-9-3, 150-2-3, 1-1-200 and 150-1-5), wheat (Triticum aestivum L.) and garden cress (Lipidium sativum L.). This experiment was conducted in laboratory at room temperature. Oil extracted from crude oil contaminated soil was added to sand used in different concentrations (0%, 2%, 4%, 6%, 8% and 10%). 10 seeds of each crop were sown in ptri-dishes with different treatments separately. For Each treatment four replicates were used in completely randomized design, germination percent was calculated, after one week, shoot and root length were measured. Data were statistically analyzed using MINTAB version 12. The results show that barley mutant line (150-2-3) was significantly different from other entries in germination percent, shoot and root length except mutant line 150-1-5 in germination percent. Results demonstrated that the mutant line 150-2-3 was promising to remediate crude oil contaminated soil.