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981.
Pan Chunxing Chen Surui Chen Ziming Li Yiming Liu Yike Zhang Zejun Xu Yani Liu Guanting Yang Kaiye Liu Guangrong Du Zhiyun Zhang Lanyue 《Environmental science and pollution research international》2022,29(14):20571-20592
Environmental Science and Pollution Research - The geographical distribution of plant resources is of great significance for studying the origin, distribution, and evolution of species. Climate and... 相似文献
982.
Hengrui Tao Jia Xing Gaofeng Pan Jonathan Pleim Limei Ran Shuxiao Wang Xing Chang Guojing Li Fei Chen Junhua Li 《Frontiers of Environmental Science & Engineering》2022,16(4):44
983.
Effects of ionic strength, pH, organic content, cell concentration, and growth phase on the removal of MA cells using chitosan-modified sepiolite were studied in the laboratory. The MA removal efficiency increased with the increase of salinity for normal clay flocculation. In contrast, for chitosan-modified clays/soils, MA removal efficiency increased with the decrease of salinity. The removal efficiency of chitosan-modified sepiolite was not significantly affected by pH (6-9), but dropped dramatically beyond pH 10. Humic acid had a small negative effect on the removal of MA cells. Cells were removed more effectively by clays around the early senescence growth phase than other growth stages. The removal efficiency increased as the cell concentration increased. In a field enclosure of Taihu Lake, a loading of 0.025 g/L chitosan-modified local soils removed 99% algal cells and no increase of chlorophyll-a was observed during the following one month's monitoring process. 相似文献
984.
Pan SH Lo KV Liao PH Schreier H 《Journal of environmental science and health. Part. B》2006,41(4):451-458
Both the advanced oxidation process (AOP) using a combination of hydrogen peroxide addition and microwave heating (H2O2/microwave), and the microwave heating process were used for solubilization of phosphorus from liquid dairy manure. About 80% of total phosphate was released into the solution at a microwave heating time of 5 min at 170 degrees C. With an addition of H2O2, more than 81% of total phosphate could be released over a reaction period of 49 h at ambient temperature. The AOP process could achieve up to 85% of total phosphate release at 120 degrees C. The results indicated that both the microwave, and the AOP processes could effectively release phosphate from liquid dairy manure. These processes could serve as pretreatments for phosphorus recovery from animal wastes, and could be combined with the struvite crystallization process to provide a new approach in treating animal wastes. 相似文献
985.
Pan B Xing B Liu W Tao S Lin X Zhang Y Yuan H Dai H Zhang X Xiao Y 《Journal of environmental science and health. Part. B》2006,41(8):1333-1347
Sorption characteristics of phenanthrene (PHE) were studied on eight soils with organic carbon contents spanning over an order of magnitude using phase distribution relationships (PDRs) at 1 h, 48 h, and 720 h contact times. A new algebraic method was employed to describe the sorption characteristics at different time intervals (between 1 h and 48 h, and 1 h and 720 h). It was found that nonlinearity increased with increasing contact time and sorption that occurred in the subsequent time interval following the initial 1 h exhibited stronger isotherm nonlinearity. Sorption coefficients were positively correlated with the organic carbon contents of the soils. Detailed sorption dynamics were also examined on these soils. A two-compartment, first-order model was used to describe the sorption dynamics. The rate constants of the two compartments differed 18-170 times, suggesting the dissimilar sorption behaviors of the mathematically separated compartments. These two compartments were labeled fast and slow sorption compartment according to the rate constants. Calculation showed that the fast compartment accounted for over 80% of the overall sorption at the initial 1 h, while the slow compartment predominated the total sorption in the following 47 h. By combining the discussion of PDRs and sorption dynamics, the contributions of the two compartments to linear and nonlinear sorption were differentiated. The slow sorption compartment made a major contribution to nonlinear sorption and possibly to sequestration of organic pollutants by these soils. 相似文献
986.
采用顶空-气相色谱法测定固定污染源废气中甲胺、二甲胺、乙胺、二乙胺和三乙胺,通过优化相关测定条件,使5种挥发性脂肪胺在0.005 mg/L~25.0 mg/L范围内线性良好,方法检出限为0.004 mg/m3~0.4 mg/m3(以采集20 L空气样品计).5种挥发性脂肪胺的加标回收率为91.0%~113%,6次测定结... 相似文献
987.
Fang Chen Ping Liu Ying Gu Zhu Zhu Amulya Nanisetti Zhangzhang Lan Zhiwei Huang Jia Sophie Liu Xiongbin Kang Yuqing Deng Liqiong Luo Dan Jiang Yong Qiu Jianchang Pan Jun Xia Ken Xiong Chao Liu Lin Xie Qianyu Shi Jing Li Xiuqing Zhang Wei Wang Snezana Drmanac Lars Bolund Hui Jiang Radoje Drmanac Xun Xu 《黑龙江环境通报》2017,37(13):1311-1321
988.
989.
Solving the dispute over historical greenhouse gases emission responsibility is critical for the future climate agreement.This article borrows the methodology from the carbon budget proposal,but further develops this approach by proposing discount of the historical responsibility due to the technology advance.Firstly,it studies the Annex I countries’mitigation and financial responsibilities of the historical emission in the carbon budget proposal;furthermore,it analyzes the results and implications of the discount approach.Results show that the discount method significantly reduces the burden of the mitigation and financial responsibilities of the Annex I countries.Thus,we claim that the discount approach is a systematic,pragmatic,and fair approach to solve the historical responsibility dispute and financial problems for the post-2020international climate institutions. 相似文献
990.
气温对长江上游巴塘站年径流的影响分析 总被引:1,自引:0,他引:1
为了深入分析气温对长江上游年径流的影响和解释青藏高原冰川融水再冻结现象的物理机制,采用对位置、尺度、形状的广义可加模型(简称GAMLSS)建立控制因素降水、气温、ATD与年径流量之间的关系。在GAMLSS框架下,气温影响因子可以用两种形式表示,一种是直接采用气温,另一种是采取ATD指数(累积气温亏损值)。通过比较不同解释变量组合下的GAMLSS模型,进而研究气温对长江上游巴塘站1960~2012年的年径流影响。结果表明:基于ATD的回归模型,在年径流序列服从对数正态分布假设的条件下拟合效果最优。与气温值相比,ATD指数能更有效地解释长江上游径流变化的特征和冰川产流的物理机制。研究成果对长江上游年径流预报、高原气候下的产流特征分析具有理论意义。 相似文献