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731.
Wang Xing Wang Bin Xiao Lili Cui Xiuqing Cen Xingzu Yang Shijie Mu Ge Xu Tao Zhou Min Chen Weihong 《Environmental science and pollution research international》2021,28(22):27555-27564
Environmental Science and Pollution Research - Atmospheric PM2.5-bound metals have been widely addressed, but research on the exposure levels and sources of personal PM2.5-bound metals among urban... 相似文献
732.
作为同被环保部列为首批排污权交易试点地区的湖北和江苏,通过多年的试点工作,两地都取得了一定经验。通过全方位对比两地排污权交易制度,包括初次分配、配套优惠政策以及排污监测等,找出湖北省目前排污权交易工作陷入停滞、排污权交易市场惨淡的原因,提出改善初始分配方式、制定相关激励政策、扩大交易对象和范围、加强环境监管等对策,以期为政府决策提供参考。 相似文献
733.
Gas/particle partitioning of polycyclic aromatic hydrocarbons in coastal atmosphere of the north Yellow Sea, China 总被引:1,自引:0,他引:1
Zhen Wang Peifang Ren Yan Sun Xindong Ma Xing Liu Guangshui Na Ziwei Yao 《Environmental science and pollution research international》2013,20(8):5753-5763
Samples of gas- and particle-phase polycyclic aromatic hydrocarbons (PAHs) were collected at three sampling stations (Xiaomai Island, Laohutan, and Zhangzi Island) in the north Yellow Sea, China during November 2008 and September 2009 to study their atmospheric transport potential and the gas/particle distributions. The composition of PAHs was dominated by gaseous compounds. The percentages of the particle-phase PAHs to the total concentrations were found to be higher during the heating period than the non-heating period. The ratios of naphthalene and acenaphthene to phenanthrene, chrysene and dibenzo(a,h)anthracene showed an increasing trend from Xiaomai Island to Zhangzi Island, which can be called as the local atmospheric distillation of PAHs. Gas/particle partitioning coefficients (K p) and their relationship with the sub-cooled liquid vapor pressures (pºL) of PAHs were investigated. The regressions of logK p versus logpºL gave significant correlations for all samples of the three sites with r 2 values in the range 0.56–0.66 (p?<?0.01). Both Junge–Pankow adsorption model and octanol–air partition coefficient absorption model tended to underestimate the sorption for most PAHs, but the absorption model appeared to be more suitable for predicting the particle fraction of PAHs than the Junge–Pankow model. 相似文献
734.
Yunpeng Xing Boyuan Xue Yongshu Lin Xueqi Wu Fang Fang Peishi Qi Jinsong Guo Xiaohong Zhou 《Frontiers of Environmental Science & Engineering》2022,16(12):155
735.
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
736.
Zhang Tian Jiang Bo Xing Yi Ya Haobo Lv Mingjie Wang Xin 《Environmental science and pollution research international》2022,29(12):16830-16859
Environmental Science and Pollution Research - Microplastics, as emerging pollutants, have received great attention in the past few decades due to its adverse effects on the environment.... 相似文献
737.
738.
促生剂投量对菌剂-促生剂协同修复沉积物的影响 总被引:1,自引:0,他引:1
采用5个110 L的模拟河道反应器,在投加菌剂的基础上(底泥稳定后向底泥和水中分别注射浓度为0.09%和0.03%的菌剂),生物促生剂投量分别设计为0(空白对照实验)、0.08、0.09、0.10和0.11 g·L~(-1),通过为期115 d的修复实验研究菌剂与促生剂协同作用时底泥微生物群落特征变化规律,进而分析其对底泥修复效果的影响.实验表明,投加促生剂后,115 d时Chloroflexi、Proteobacteria、Firmicutes、Betaproteobacteria及Bacteroidetes等主要功能菌群相对丰度增加,脲酶活性与蛋白酶活性后期时总体上低于单独投加菌剂组.促生剂投量为0.10 g·L~(-1)时,上覆水COD_(Cr)稳定浓度为16.82 mg·L~(-1),低于其余各组;底泥TOC含量由初始的0.808%下降至第115 d时的0.687%,去除率为14.9%,显著高于其余各组;促生剂投量为0.11 g·L~(-1)时,底泥全氮去除率最高为14.8%.生物促生剂促使微生物群落向更适宜降解去除氮素及有机质的方向演替,有效改善底泥环境. 相似文献
739.
Distribution of soil arsenic species, lead and arsenic bound to humic acid molar mass fractions in a contaminated apple orchard 总被引:2,自引:0,他引:2
Newton K Amarasiriwardena D Xing B 《Environmental pollution (Barking, Essex : 1987)》2006,143(2):197-205
Excessive application of lead arsenate pesticides in apple orchards during the early 1900s has led to the accumulation of lead and arsenic in these soils. Lead and arsenic bound to soil humic acids (HA) and soil arsenic species in a western Massachusetts apple orchard was investigated. The metal-humate binding profiles of Pb and As were analyzed with size exclusion chromatography-inductively coupled plasma mass spectrometry (SEC-ICP-MS). It was observed that both Pb and As bind "tightly" to soil HA molar mass fractions. The surface soils of the apple orchard contained a ratio of about 14:1 of water soluble As (V) to As (III), while mono-methyl (MMA) and di-methyl arsenic (DMA) were not detectable. The control soil contained comparatively very low levels of As (III) and As (V). The analysis of soil core samples demonstrated that As (III) and As (V) species are confined to the top 20 cm of the soil. 相似文献
740.
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