The Experts below are selected from a list of 6594 Experts worldwide ranked by ideXlab platform
Zhibo Lu - One of the best experts on this subject based on the ideXlab platform.
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converter slag coal Cinder columns for the removal of phosphorous and other pollutants
Journal of Hazardous Materials, 2009Co-Authors: Jian Yang, Su Wang, Zhibo LuAbstract:Abstract A mixture of converter slag and coal Cinder as adsorbent for the removal of phosphorous and other pollutants was studied in the paper. The maximum P adsorption capacity, pH of solution, contact time and initial phosphate concentration were evaluated in batch experiments for the two materials firstly. The data of P sorption were best fitted to Langumir equation, and the maximum adsorption capacities of converter slag and coal Cinder were 2.417 and 0.398 mg P/g, respectively. The pH of solutions with converter slag and coal Cinder changed dramatically with time and closed to 8 in 8 h, and the influence of initial pH on phosphate removal by coal Cinder was more significant than by converter slag. Phosphate removal rate by converter slag decreased with increase of initial phosphate concentrations. Subsequently, two flow-through columns (Column 1#, V converter slag : V coal Cinder = 1:5; Column 2#, V converter slag : V coal Cinder = 1:3) were operated for the removal of phosphorous and other pollutants from the effluents of a vermifilter for nearly eleven months. Results indicated the average removal efficiency of total phosphorus, dissolved phosphorus, COD and NH 4 + –N by Column 1# were 44%, 56%, 31% and 67%, and by Column 2# were 42%, 54%, 24% and 57%, respectively. Column 1# had higher removal efficiency for P and other pollutants.
Jian Yang - One of the best experts on this subject based on the ideXlab platform.
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converter slag coal Cinder columns for the removal of phosphorous and other pollutants
Journal of Hazardous Materials, 2009Co-Authors: Jian Yang, Su Wang, Zhibo LuAbstract:Abstract A mixture of converter slag and coal Cinder as adsorbent for the removal of phosphorous and other pollutants was studied in the paper. The maximum P adsorption capacity, pH of solution, contact time and initial phosphate concentration were evaluated in batch experiments for the two materials firstly. The data of P sorption were best fitted to Langumir equation, and the maximum adsorption capacities of converter slag and coal Cinder were 2.417 and 0.398 mg P/g, respectively. The pH of solutions with converter slag and coal Cinder changed dramatically with time and closed to 8 in 8 h, and the influence of initial pH on phosphate removal by coal Cinder was more significant than by converter slag. Phosphate removal rate by converter slag decreased with increase of initial phosphate concentrations. Subsequently, two flow-through columns (Column 1#, V converter slag : V coal Cinder = 1:5; Column 2#, V converter slag : V coal Cinder = 1:3) were operated for the removal of phosphorous and other pollutants from the effluents of a vermifilter for nearly eleven months. Results indicated the average removal efficiency of total phosphorus, dissolved phosphorus, COD and NH 4 + –N by Column 1# were 44%, 56%, 31% and 67%, and by Column 2# were 42%, 54%, 24% and 57%, respectively. Column 1# had higher removal efficiency for P and other pollutants.
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Use of Converter Slag-Coal Cinder Filters for Phosphate Removal
2009 3rd International Conference on Bioinformatics and Biomedical Engineering, 2009Co-Authors: Su Wang, Jian Yang, Meiyan XingAbstract:Mixing converter slag and coal Cinder as substrates of filters for phosphorous removal from domestic wastewater was studied in the column experiments. Three converter slag-coal Cinder filter columns: Column 1# (Vconverter slag:Vcoal Cinder =1:1.5), Column 2#(Vconverter slag:Vcoal Cinder =1:3) , Column 3#(Vconverter slag:Vcoal Cinder =1:5) were operated for more than one month, and the average influent and effluents total phosphorus (TP) concentrations were 2.24 plusmn 0.52 mg/L, 0.66 plusmn 0.23 mg/L, 0.96 plusmn 0.28 mg/L and 0.59 plusmn 0.23 mg/L, respectively. After three months, slag samples were taken from the columns and P-extraction experiments were performed to elucidate the dominant P-retention mechanisms. Main reasons for P-retention were the Fe-bounded and Ca-bounded P. This study indicated the potential use of the converter slag-coal Cinder filter with higher P-removal capacity for secondary and tertiary treatment, and the material ratio of converter slag to coal Cinder was an important parameter for the system.
Su Wang - One of the best experts on this subject based on the ideXlab platform.
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converter slag coal Cinder columns for the removal of phosphorous and other pollutants
Journal of Hazardous Materials, 2009Co-Authors: Jian Yang, Su Wang, Zhibo LuAbstract:Abstract A mixture of converter slag and coal Cinder as adsorbent for the removal of phosphorous and other pollutants was studied in the paper. The maximum P adsorption capacity, pH of solution, contact time and initial phosphate concentration were evaluated in batch experiments for the two materials firstly. The data of P sorption were best fitted to Langumir equation, and the maximum adsorption capacities of converter slag and coal Cinder were 2.417 and 0.398 mg P/g, respectively. The pH of solutions with converter slag and coal Cinder changed dramatically with time and closed to 8 in 8 h, and the influence of initial pH on phosphate removal by coal Cinder was more significant than by converter slag. Phosphate removal rate by converter slag decreased with increase of initial phosphate concentrations. Subsequently, two flow-through columns (Column 1#, V converter slag : V coal Cinder = 1:5; Column 2#, V converter slag : V coal Cinder = 1:3) were operated for the removal of phosphorous and other pollutants from the effluents of a vermifilter for nearly eleven months. Results indicated the average removal efficiency of total phosphorus, dissolved phosphorus, COD and NH 4 + –N by Column 1# were 44%, 56%, 31% and 67%, and by Column 2# were 42%, 54%, 24% and 57%, respectively. Column 1# had higher removal efficiency for P and other pollutants.
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Use of Converter Slag-Coal Cinder Filters for Phosphate Removal
2009 3rd International Conference on Bioinformatics and Biomedical Engineering, 2009Co-Authors: Su Wang, Jian Yang, Meiyan XingAbstract:Mixing converter slag and coal Cinder as substrates of filters for phosphorous removal from domestic wastewater was studied in the column experiments. Three converter slag-coal Cinder filter columns: Column 1# (Vconverter slag:Vcoal Cinder =1:1.5), Column 2#(Vconverter slag:Vcoal Cinder =1:3) , Column 3#(Vconverter slag:Vcoal Cinder =1:5) were operated for more than one month, and the average influent and effluents total phosphorus (TP) concentrations were 2.24 plusmn 0.52 mg/L, 0.66 plusmn 0.23 mg/L, 0.96 plusmn 0.28 mg/L and 0.59 plusmn 0.23 mg/L, respectively. After three months, slag samples were taken from the columns and P-extraction experiments were performed to elucidate the dominant P-retention mechanisms. Main reasons for P-retention were the Fe-bounded and Ca-bounded P. This study indicated the potential use of the converter slag-coal Cinder filter with higher P-removal capacity for secondary and tertiary treatment, and the material ratio of converter slag to coal Cinder was an important parameter for the system.
Gong Feng - One of the best experts on this subject based on the ideXlab platform.
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enhanced biodegradation of pyrene and indeno 1 2 3 cd pyrene using bacteria immobilized in Cinder beads in estuarine wetlands
Marine Pollution Bulletin, 2016Co-Authors: Ruying Huang, Weijun Tian, Huibo Yu, Yangguo Zhao, Yuhang Zhou, Gong FengAbstract:Two strains (Pseudomonas taiwanensis PYR1 and Acinetobacter baumannii INP1) were isolated from PAH-contaminated Liaohe estuarine wetland using enrichment. The cells of PYR1 and INP1 were immobilized in Cinder beads for pyrene and indeno(1,2,3-cd)pyrene biodegradation in wetland. Biodegradation of pyrene and indeno(1,2,3-cd)pyrene in soils from wetland was carried out in pots using free cells as well as those immobilized in Cinder beads to ascertain the role of bioaugmentation. Supported by the Cinder beads, the immobilized cells degraded 70.7% and 80.9% of pyrene and indeno(1,2,3-cd)pyrene respectively after 30 days. While the free cells degraded only 58.2% and 55.3%. Additionally, microbial analysis with high-throughput sequencing revealed the changes of microbial communities in soil without and with Cinder beads immobilized with strains. The result indicated that Gammaproteobacteria were dominant PAH-degrading groups during bioaugmentation. This effective approach can be used to treat other PAH-contaminated wetlands by immobilizing different species of bacteria in Cinder beads.
Thomas G. Whitham - One of the best experts on this subject based on the ideXlab platform.
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relative importance of environmental stress and herbivory in reducing litter fall in a semiarid woodland
Ecosystems, 2005Co-Authors: Thomas D Schuster, Thomas G. Whitham, Neil S Cobb, Stephen C HartAbstract:We examined the impact of soil stress (low water and nutrient availabilities) and two keystone insect herbivores on pinyon pine (Pinus edulis) needle litterfall. We compared trees growing on two distinct soil types: volcanic Cinders, which exhibit pronounced water and nutrient limitation, and sandy-loam soils, which have higher water-storage capacity and nutrient availability. Using two longterm herbivore removal experiments (15 and 18 years, respectively), we also examined the effects of the pinyon needle scale (Matsucoccus acalyptus, which attacks juvenile trees) and the stem-boring moth (Dioryctria albovittella, which attacks mature trees) on pinyon litterfall. These herbivores reach high densities on Cinder soils but are absent or occur at much lower levels on sandy-loam soils. Four years of litterfall measurements showed four major patterns. First, independent of herbivory, needle litterfall was 20% lower under trees on high-stress Cinder soils than on sandy-loam soils. Second, in agreement with the negative impact of scales on tree growth (that is, a 30% decline in stem growth), trees with scale infestations had 25% lower litterfall rates than trees resistant to scale; however, 15 years of scale-insect removal did not significantly increase needle litterfall. This implies possible intrinsic differences in litter production between scale-resistant and scale-susceptible trees. Third, in contrast with significant negative effects of moth herbivory on tree growth (that is, a 27% decline in stem growth), moth herbivory had no effect on needle litterfall. This, along with increased stem density in moth-susceptible trees, may be evidence of compensatory production. Fourth, there were strong year by soil type and year by scale herbivory interactions, such that in some years the effect on litterfall can be obscured or reversed by some other factor. In summary, soil stress has a strong and predictable effect on needle litterfall, whereas the relationship between insect herbivory and needle litterfall is weaker and depends on the individual herbivore. These effects, however, are mediated by other environmental factors that have considerable annual variation.
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The Pinyon Rhizosphere, Plant Stress, and Herbivory Affect the Abundance of Microbial Decomposers in Soils
Microbial Ecology, 2003Co-Authors: Cheryl R. Kuske, L.o. Ticknor, Joseph D. Busch, Catherine A. Gehring, Thomas G. WhithamAbstract:: In terrestrial ecosystems, changes in environmental conditions that affect plant performance cause a cascade of effects through many trophic levels. In a 2-year field study, seasonal abundance measurements were conducted for fast-growing bacterial heterotrophs, humate-degrading actinomycetes, fungal heterotrophs, and fluorescent pseudomonads that represent the decomposers in soil. Links between plant health and soil microbiota abundance in pinyon rhizospheres were documented across two soil types: a dry, nutrient-poor volcanic Cinder field and a sandy-loam soil. On the stressful Cinder fields, we identified relationships between soil decomposer abundance, pinyon age, and stress due to insect herbivory. Across seasonal variation, consistent differences in microbial decomposer abundance were identified between the Cinders and sandy-loam soil. Abundance of bacterial heterotrophs and humate-degrading actinomycetes was affected by both soil nutritional status and the pinyon rhizosphere. In contrast, abundance of the fungal heterotrophs and fluorescent pseudomonads was affected primarily by the pinyon rhizosphere. On the Cinder field, the three bacterial groups were more abundant on 150-year-old trees than on 60-year-old trees, whereas fungal heterotrophs were unaffected by tree age. Fungal heterotrophs and actinomycetes were more abundant on insect-resistant trees than on susceptible trees, but the opposite was true for the fluorescent pseudomonads. Although all four groups were present in all the environments, the four microbial groups were affected differently by the pinyon rhizosphere, by tree age, and by tree stress caused by the Cinder soil and insect herbivory.