Huang GY Zhao L Dong YH et al.. Remediation of soils contaminated with polychlorinated biphenyls by microwave-irradiated manganese dioxide. Journal of Hazardous Materials 2011 186(1): 128-132. (IF 3.723 工程技术,一区)
Abstract
The removal of polychlorinated biphenyls (PCBs) using microwave-irradiated manganese dioxide (MnO(2)) in PCB-contaminated soils under different conditions is investigated. The removal of PCB77 in two actual soil samples exhibits strong pH-dependent behavior and the removal efficiency is higher in acidic soil (Ali-Perudic Ferrosols) than that in neutral soil (Udic Argosols). The removal kinetics of PCB77 using microwave-irradiated MnO(2) under different experimental conditions fits a pseudo-first-order kinetic model well. Both the removal efficiency and the kinetic constant (k) values of PCB77 in Ali-Perudic Ferrosols considerably increase although in a nonlinear fashion as the initial amount of MnO(2) is increased as the treated soil mass is increased and as the microwave power is increased. The reactivity of three PCBs (PCB28 PCB77 and PCB118) did not present as a function of the degree of chlorination in the reaction with microwave-irradiated MnO(2). The pronounced removal of three PCBs in contaminated soil (all above 95%) indicates that MnO(2) in combination with microwave irradiation is promising for technological applications that seek to remediate sites critically polluted with PCBs.
Feng ZZ Pang J Kobayashi K et al.. Differential responses in two varieties of winter wheat to elevated ozone concentration under fully open-air field conditions. Global Change Biology 2011 17(1): 580-591. (IF 6.346 环境科学,一区)
Abstract
Two modern cultivars [Yangmai16 (Y16) and Yangfumai 2 (Y2)] of winter wheat (Triticum aestivum L.) with almost identical phenology were investigated to determine the impacts of elevated ozone concentration (E-O(3)) on physiological characters related to photosynthesis under fully open-air field conditions in China. The plants were exposed from the initiation of tillering to final harvest with E-O(3) of 127% of the ambient ozone concentration (A-O(3)). Measurements of pigments gas exchange rates chlorophyll a fluorescence and lipid oxidation were made in three replicated plots throughout flag leaf development. In cultivar Y2 E-O(3) significantly accelerated leaf senescence as indicated by increased lipid oxidation as well as faster declines in pigment amounts and photosynthetic rates. The lower photosynthetic rates were mainly due to nonstomatal factors e.g. lower maximum carboxylation capacity electron transport rates and light energy distribution. In cultivar Y16 by contrast the effects of E-O(3) were observed only at the very last stage of flag leaf ageing. Since the two cultivars had almost identical phenology and very similar leaf stomatal conductance before senescence the greater impacts of E-O(3) on cultivars Y2 than Y16 cannot be explained by differential ozone uptake. Our findings will be useful for scientists to select O(3)-tolerant wheat cultivars against the rising surface [O(3)] in East and South Asia.
Wu YH Hu ZY Kerr PG et al.. A multi-level bioreactor to remove organic matter and metals together with its associated bacterial diversity. Bioresource Technology 2011 102(2): 736-741. (IF 4.365 工程技术,一区)
Abstract
The purpose of this study was to treat complex wastewater consisting of domestic wastewater tobacco processing and building materials washings. The proposed multi-level bioreactor consists of a biopond-biofilter anoxic-aerobic (A-O) fluidized beds and a photoautotrophic system. The results show that when the hydraulic load of the bioreactor was 200m(3)-d it successfully and simultaneously removed the organic matter and metals. When the bioreactor was in a relatively steady-state condition the overall average organic matter and metals removal efficiencies are as follows COD (89%) UV(245) nm-matter (91%) Cu (78%) Zn (79%) and Fe (84%). The growth conditions of the native bacterial habitat were improved which resulted from the increase of the in bacterial diversity under the rejuvenated conditions induced by the bioreactor. The results demonstrate that the multi-level bioreactor without a sludge treatment system can remove heterogeneous organic matter and metals from wastewater.
Akiyama H Yan XY Yagi K. Evaluation of effectiveness of enhanced-efficiency fertilizers as mitigation options for N2O and NO emissions from agricultural soils: meta-analysis. Global Change Biology 2010 16(6): 1837–1846.
Buckeridge KM Zufelt E Chu HY et al.. Soil nitrogen cycling rates in low arctic shrub tundra are enhanced by litter feedbacks. Plant and Soil 2010 330(1–2): 407–421.
Cai YJ Ding WX Zhang XL et al.. Contribution of heterotrophic nitrification to nitrous oxide production in a long-term N-fertilized arable black soil. Communications in Soil Science and Plant Analysis 2010 41(19): 2264–2278.
Chen JH Wang YJ Zhou DM et al.. Adsorption and Desorption of Cu(II) Zn(II) Pb(II) and Cd(II) on the Soils Amended with Nanoscale Hydroxyapatite. Environmental Progress and sustainable Energy 2010 29(2): 233–241.
Chen QX Shi WM Wang XC. Selenium speciation and distributioncharacteristics in the rhizosphere soil of rice (Oryza sativa L.) seedlings. Communications in Soil Science and Plant Analysis 2010 41(12): 1411-1425.
Chen RF Shen RF Yang XD et al.. Effects of buckwheat growth on variation of aluminum and major metals in root-zone soil solutions. Journal of Plant Nutrition and Soil Science 2010 173(5): 788–794.
Chen SB Ma YB Chen L et al.. Adsorption of aqueous Cd2+ Pb2+ Cu2+ ions by nanohydroxyapatite: Single- and multi-metal competitive adsorption study. Geochemical Journal 2010 44(3): 233–239.
Chen ZC Zhao XQ Shen RF. The alleviating effect of ammonium on aluminum toxicity in Lespedeza bicolor results in decreased aluminum-induced malate secretion from roots compared with nitrate. Plant and Soil 2010 337(1–2): 389–398.
Chen SB Ma YB Chen L et al.. Comparison of Pb(II) Immobilized by Bone Char Meal and Phosphate Rock: Characterization and Kinetic Study. Archives of Environmental Contamination and Toxicology 2010 58(1): 24–32.
Cheng L Zhu J Chen G et al.. Atmospheric CO2 enrichment facilitates cation release from soil. Ecology Letters 2010 13(3): 284–291.
Chu HY Fierer N Lauber CL et al.. Soil bacterial diversity in the Arctic is not fundamentally different from that found in other biomes. Environmental Microbiology 2010 12(11): 2998–3006.
Deng H Zhang B Yin R et al.. Long-term effect of re-vegetation on the microbial community of a severely eroded soil in sub-tropical China. Plant and Soil 2010 328(1–2): 447–458.
Ding WX Yagi K Cai ZC et al.. Impact of long-term application of fertilizers on N2O and NO production potential in an intensively cultivated sandy loam soil. Water and Soil Pollution 2010 212(1–4): 141–153.
Wang FY Lin XG Hu JL. Glomus caledonium spores can be occupied by Glomus microaggregatum spores. Annals of Microbiology 2009.4 (59): 693-697
Dorner J Dec D Peng X et al.. Change of shrinkage behavior of an Andisol in southern Chile: Effects of land use and wetting-drying cycles. Soil & Tillage Research 2009.1 (106): 45-53
Dorner J Dec D Peng XH et al.. Effect of Land Use on Structural Stability and Pore Functions of an Andisol (Typic Hapludand) in Southern Chile. Revista De La Ciencia Del Suelo Y Nutricion Vegetal 2009.3 (9): 190-209
Hu JL Lin XG Wang JH et al.. Arbuscular mycorrhizal fungus enhances crop yield and P-uptake of maize (Zea mays L.): A field case study on a sandy loam soil as affected by long-term P-deficiency fertilization. Soil Biology & Biochemistry 2009.12 (41): 2460-2465
Zhang JB Cai ZC Cheng Y et al.. Denitrification and total nitrogen gas production from forest soils of Eastern China. Soil Biology & Biochemistry 2009.12 (41): 2551-2557
Zhao X Xing GX. Variation in the relationship between nitrification and acidification of subtropical soils as affected by the addition of urea or ammonium sulfate. Soil Biology & Biochemistry 2009.12 (41): 2584-2587
Stolte J Shi XZ Ritsema CJ. Introduction: Soil erosion and nutrient losses in the Hilly Purple Soil area in China. Soil & Tillage Research 2009.2 (105): 283-284
Yang JL Zhang GL Shi XZ et al.. Dynamic changes of nitrogen and phosphorus losses in ephemeral runoff processes by typical storm events in Sichuan Basin Southwest China. Soil & Tillage Research 2009.2 (105): 292-299
Wang HJ Shi XZ Yu DS et al.. Factors determining soil nutrient distribution in a small-scaled watershed in the purple soil region of Sichuan Province China. Soil & Tillage Research 2009.2 (10): 5300-306
Wang K Wang HJ Shi XZ et al.. Landscape analysis of dynamic soil erosion in Subtropical China: A case study in Xingguo County Jiangxi Province. Soil & Tillage Research 2009.2 (105): 313-321
Shi XZ Wang HJ Yu DS et al.. Potential for soil carbon sequestration of eroded areas in subtropical China. Soil & Tillage Research 2009.2 (105): 322-327
Lin JS Shi XZ Lu XX et al.. Storage and Spatial Variation of Phosphorus in Paddy Soils of China. Pedosphere 2009.6 (19): 790-798
Cang L Zhou DM Wang QY et al.. Effects of electrokinetic treatment of a heavy metal contaminated soil on soil enzyme activities. Journal of Hazardous Materials 2009.2-3 (172): 1602-1607
Wang YJ Cui YX Zhou DM et al.. Adsorption Kinetics of Glyphosate and Copper (II) Alone and Together on Two Types of Soils. Soil Science Society of America Journal 2009.6 (73): 1995-2001