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621.
Tao Zhang Yaqun He Fangfang Wang Linhan Ge Xiangnan Zhu Hong Li 《Waste management (New York, N.Y.)》2014,34(6):1051-1058
Mineral processing operation is a critical step in any recycling process to realize liberation, separation and concentration of the target parts. Developing effective recycling methods to recover all the valuable parts from spent lithium-ion batteries is in great necessity. The aim of this study is to carefully undertake chemical and process mineralogical characterizations of spent lithium-ion batteries by coupling several analytical techniques to provide basic information for the researches on effective mechanical crushing and separation methods in recycling process. The results show that the grade of Co, Cu and Al is fairly high in spent lithium ion batteries and up to 17.62 wt.%, 7.17 wt.% and 21.60 wt.%. Spent lithium-ion batteries have good selective crushing property, the crushed products could be divided into three parts, they are Al-enriched fraction (+2 mm), Cu and Al-enriched fraction (?2 + 0.25 mm) and Co and graphite-enriched fraction (?0.25 mm). The mineral phase and chemical state analysis reveal the electrode materials recovered from ?0.25 mm size fraction keep the original crystal forms and chemical states in lithium-ion batteries, but the surface of the powders has been coated by a certain kind of hydrocarbon. Based on these results a flowsheet to recycle spent LiBs is proposed. 相似文献
622.
Chao Jin Bingqing Liang Jingxin Li Fang Li 《Journal of Polymers and the Environment》2013,21(4):1088-1099
This work was aimed at researching the aerobic biodegradation of poly(p-dioxanone) (PPDO), a novel kind of degradable polymer material, by simulating real-life conditions in a laboratory-scale test, specified by the standard methods based on two biodegradation environments, composting and aqueous media. To measure and describe the biodegradability of PPDO, not only had carbon dioxide produced by respiratory metabolism of microorganism been measured, which determines the ultimate aerobic biodegradability of chemical compounds, but also the detailed results of biodegradation were further characterized by monitoring physical, chemical and thermal properties changes of test materials at different incubation times in the two media, confirmed by using the appropriate analytical techniques. Scanning electron microscopy was used to observe the surface morphology, and the thermal performance of PPDO was characterized by differential scanning calorimetry. The changes of molecular weight were detected by intrinsic viscosity ([η]) and gel permeation chromatography, and the variations of the molecular structure were monitored by the nuclear magnetic resonance and FT-IR. The results show that PPDO has outstanding character of biodegradation and may be more adapted for biodegrading in liquid medium than in composting. 相似文献
623.
奈芳 《中国个体防护装备》2009,(2)
本文简单概括和介绍了《缺氧危险作业安全规程》(GB8958-88)及香港《工厂及工业经营(密闭空间)规例》,并提出了密闭空间安全作业的一些方法和建议。 相似文献
624.
625.
Environmental Chemistry Letters - Antibiotics are water and soil contaminants causing the development of multi-resistant bacteria, calling for advanced water treatments. For instance,... 相似文献
626.
Regional Environmental Change - As a direct result of climate change and extreme weather events, refugee migration has attracted worldwide concern. In this study, we select the North China Plain... 相似文献
627.
Chen Qing Wu Wanqing Zhang Linghua Wei Fang 《Environmental science and pollution research international》2021,28(37):51242-51250
Environmental Science and Pollution Research - A bioenhancement strategy for improving the anaerobic degradation efficiency of ship domestic sewage under microaerobic conditions was proposed in... 相似文献
628.
The burrowing mechanism of a coral borer, Lithophaga nigra, from Penhu island was studied from 1984–1985. Chemical analysis, behavioral observation, anatomy, functional morphology and electronmicroscopic data revealed that this organism is not a chemical borer, as previously believed, but a mechanical borer with a very specially modified internal organ and an external shell configuration that enables it to function as an extremely efficient regenerative mechanical file. 相似文献
629.
D. Marc. Kilgour Liping Fang Keith W. Hipel 《Journal of the American Water Resources Association》1992,28(1):141-153
ABSTRACT: Game-theoretic models are developed for describing and analyzing the inspection and enforcement process, especially as it relates to environmental laws and regulations in North America. Based on these models, systems using irrevocable control orders can be compared to those relying on court determination of guilt and punishment. The cost-effectiveness of environmental enforcement can be systematically assessed in terms of factors such as the private gains for violators, the costs of inspection, penalties, and the social value of deterring violations. The policy implications of the analysis, especially with reference to environmental protection, are emphasized. 相似文献
630.
固体废物管理技术进展 总被引:2,自引:1,他引:2
概述了固体废物管理技术近年来的主要进展,这些进展包括,固体废物从“摇蓝到坟墓”的全过程管理,即从废物产生到收集、运输贮存,再循环,再利用,处理直至最终处理过程所涉及到的:废物最小量化管理技术;废物转移跟踪管理中产生者,运输者,处理处理者,主管当局的职责、主管当局的职责,义务和管理方式;废物经营者向主管当局申请许可证的程序和申请。时,对废物交换制度和废物管理信息系统也作了概要介绍。 相似文献