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981.
Jianfeng Zhang Shichang Wei Zhenxing Liu Huang Tang Xiaoguang Meng Weihuang Zhu 《环境科学学报(英文版)》2022,34(8):67-75
In this study, Pb(II) was used as a target heavy metal pollutant, and the metabolism of Shewanella putrefaciens (S. putrefaciens) was applied to achieve reducing conditions to study the effect of microbial reduction on lead that was preadsorbed on graphene oxide (GO) surfaces. The results showed that GO was transformed to its reduced form (r-GO) by bacteria, and this process induced the release of Pb(II) adsorbed on the GO surfaces. After 72 hr of exposure in an S. putrefaciens system, 5.76% of the total adsorbed Pb(II) was stably dispersed in solution in the form of a Pb(II)-extracellular polymer substance (EPS) complex, while another portion of Pb(II) released from GO-Pb(II) was observed as lead phosphate hydroxide (Pb10(PO4)6(OH)2) precipitates or adsorbed species on the surface of the cell. Additionally, increasing pH induced the stripping of oxidative debris (OD) and elevated the content of dispersible Pb(II) in aqueous solution under the conditions of S. putrefaciens metabolism. These research results provide valuable information regarding the migration of heavy metals adsorbed on GO under reducing conditions due to microbial metabolism. 相似文献
982.
Sulfur deposition simulations over China, Japan, and Korea: a model intercomparison study for abating sulfur emission 总被引:1,自引:1,他引:0
Cheol-Hee Kim Lim-Seok Chang Fan Meng Mizuo Kajino Hiromasa Ueda Yuanhang Zhang Hye-Young Son Jong-Jae Lee Youjiang He Jun Xu Keiichi Sato Tatsuya Sakurai Zhiwei Han Lei Duan Jeong-Soo Kim Suk-Jo Lee Chang-Keun Song Soo-Jin Ban Shang-Gyoo Shim Young Sunwoo Tae-Young Lee 《Environmental science and pollution research international》2012,19(9):4073-4089
In response to increasing trends in sulfur deposition in Northeast Asia, three countries in the region (China, Japan, and Korea) agreed to devise abatement strategies. The concepts of critical loads and source?Creceptor (S?CR) relationships provide guidance for formulating such strategies. Based on the Long-range Transboundary Air Pollutants in Northeast Asia (LTP) project, this study analyzes sulfur deposition data in order to optimize acidic loads over the three countries. The three groups involved in this study carried out a full year (2002) of sulfur deposition modeling over the geographic region spanning the three countries, using three air quality models: MM5-CMAQ, MM5-RAQM, and RAMS-CADM, employed by Chinese, Japanese, and Korean modeling groups, respectively. Each model employed its own meteorological numerical model and model parameters. Only the emission rates for SO2 and NOx obtained from the LTP project were the common parameter used in the three models. Three models revealed some bias from dry to wet deposition, particularly the latter because of the bias in annual precipitation. This finding points to the need for further sensitivity tests of the wet removal rates in association with underlying cloud?Cprecipitation physics and parameterizations. Despite this bias, the annual total (dry plus wet) sulfur deposition predicted by the models were surprisingly very similar. The ensemble average annual total deposition was 7,203.6?±?370 kt S with a minimal mean fractional error (MFE) of 8.95?±?5.24?% and a pattern correlation (PC) of 0.89?C0.93 between the models. This exercise revealed that despite rather poor error scores in comparison with observations, these consistent total deposition values across the three models, based on LTP group's input data assumptions, suggest a plausible S?CR relationship that can be applied to the next task of designing cost-effective emission abatement strategies. 相似文献
983.
Wang Jiajun Meng Xiaoqing Chen Yu Zheng Guanyu Zhou Lixiang 《Environmental science and pollution research international》2021,28(11):13300-13311
Environmental Science and Pollution Research - Fenton conditioning processes have been recently employed to improve the dewaterability of sewage sludge. However, it remains unclear whether the... 相似文献
984.
排污许可制度改革是我国"十三五"期间一项重大内容。宁夏自2017年开始全面推行排污许可制改革,积极推进排污许可证的核发。本文对宁夏排污许可证制度落实情况进行梳理,并从工作机制、证后监管、信息化平台、培育第三方服务等方面提出对策建议。 相似文献
985.
Zhang Bo Yuan Qingbin Wang Meng meng Sun Ruonan Liu Huiling Wang Peng 《Environmental science and pollution research international》2021,28(12):14423-14433
Environmental Science and Pollution Research - Though heavy metals are widely reported to induce antibiotic resistance propagation, how antibiotic resistance changes in response to heavy metal... 相似文献
986.
Meng Qingxin Liu Shuang Guo Yue Hu Yunlong Yu Zhidan Bello Ayodeji Wang Zhigang Xu Weihui Xu Xiuhong 《Environmental science and pollution research international》2023,30(8):20265-20276
Environmental Science and Pollution Research - Microbes often form complex ecological networks in various habitats. Co-occurrence network analysis allows exploring the complex community... 相似文献
987.
988.
Cheng Jiali Tang Zhenwu Ma Yan Yin Hongmin Meng Tong Sun Jiazheng 《Environmental science and pollution research international》2021,28(13):16054-16064
Environmental Science and Pollution Research - Methyl siloxanes are becoming increasingly prevalent in the environment because of their extensive use in various consumer products. Little is known... 相似文献
989.
以柴油机为研究对象,研究了净化柴油机排气微粒的新技术。介绍了柴油机排气微粒的特性、净化技术及电除尘器的基本工作原理以及工作特性。说明了多孔泡沫金属的特性,并设计了净化柴油机排气微粒的以多孔泡沫金属为集尘极的电除尘器结构及原理,分析了该净化装置的优点。 相似文献
990.
Weiqing MENG Cui HAO Hongyuan LI Meiting JU 《Frontiers of Environmental Science & Engineering》2010,4(2):203-212
This study presents a quantitative and ecological benefit evaluation of the Baiyangdian wetland in China between the years 2000 and 2006. Methods of EMERGY analysis were applied to illustrate the wetland ecosystem, to evaluate the economic and environmental inputs and consequent yields, and to assess the sustainability of the Baiyangdian wetland. The indicators for the integrated ecological and economic system, such as EMERGY yield ratio (EYR) (7.51), EMERGY investment ratio (EIR) (4.52), environmental loading ratio (ELR) (2.92), EMERGY exchange ratio (0.41), and EMERGY sustainable indicator (ESI) (2.57) were calculated, compared, analyzed, and discussed. The non-renewable investment in Baiyangdian was greater than renewable investment, leading to the unsustainable development of the system. High EYR indicated that the Baiyangdian integrated system had created huge profits for its people, while ELR and ESI revealed that human behavior has been a heavy burden on the environment, and countermeasures should be taken by the Chinese government to relieve and resolve these problems. Potential management methods were also proposed in this paper. 相似文献