Gellable composite materials (GCM) were prepared from a smelting slag of copper and nickel deposits and cement, and activated using gypsum and chemical activators. The effects of material ratio, dosage of chemical activators, and gypsum on the mechanical properties of GCM were studied. Our results showed that the chemical activators of Na2SO4, Na2SiO3, NaOH, and Na2CO3 could improve the compressive strength of the GCM. Considering the market cost and ease operation, the compressive strength of the GCM could be significantly improved with 2% Na2SO4. The experiment results also showed that the compound chemical activator could improve the compressive strength of gelled material. The strength of GCM reaches 41.6 MPa when 2% gypsum and 80% of smelting slags of copper and nickel deposits were used, which met the national standards requirements of GCM. As such, it is expected that a large amount of copper and nickel mining smelting slag could be utilized for the production of cementitious materials.
Hexavalent chromium species, Cr(VI), which can activate teratogenic processes, disturb DNA synthesis and induce mutagenic changes resulting in malignant tumors. The detection and quantification of Cr(VI) is very necessary. One of the rapid and simple methods for contaminant analysis is fluorescence detection using organic dye molecules. Its application is limited owing to concentration quenching due to aggregation of fluorescent molecules. In this study, we successfully intercalated 7-amino-4-methylcoumarin (AMC) into the interlayer space of montmorillonite (MMT), significantly inhibited fluorescence quenching. Due to enhanced fluorescence property, the composite was fabricated into a film with chitosan to detect Cr(VI) in water. Cr(VI) can be detected in aqueous solution by instruments excellent, ranging from 0.005 to 100 mM with a detection limit of 5 μM.
Arsenic (As) contamination of surface water has long been a threat to human health. Extensive studies were made at the bench-scale for the removal of As from water. Commonly-used materials for the removal of As include Al and Fe hydroxides that will form complexes with As. Recently, modification of Earth materials to reverse their surface charge to positive to reduce the mobility of arsenite and arsenate also attracted great attention. In 2008, a severe As contamination was reported in the lake of Yangzonghai, Yunnan, China. Although the As concentration was maintained below 0.05 mg/L for the lake, after 28 months of restoration, the discharge of mine tailings from a nearby fertilizer plants was still one of the contributors to the As in the lake. In this study, zeolite was modified by ionic liquids and the modified materials were installed as a permeable reactive wall (PRW) to contain the As movement. Preliminary results showed more than an 80% reduction in As after surface water moved through the PWR over the six-month sampling period confirming the effectiveness of ionic liquid-modified Earth materials for environmental application.
Divalent mercury ion (Hg2+) is one of the most common pollutants in water with high toxicity and significant bioaccumulation, for which sensitive and selective detection methods are highly necessary to carry out its detection and quantification. Fluorescence detection by organic dyes is a simple and rapid method in pollutant analyses and is limited because of quenching caused by aggregation dye molecules. Hydrotalcite (LDH) is one of the most excellent carrier materials. In this study, an organic dye acridine orange (AO) was successfully loaded on the LDH layers, which significantly inhibited fluorescence quenching of AO. The composite AO/LDH reaches the highest fluorescence intensity when the AO initial concentration is 5 mg/L. With its enhanced fluorescent property, the composite powder was fabricated to fluorescence test papers. The maximal fluorescence intensity was achieved with a pulp to AO/LDH ratio of 1:5 which can be used to detect Hg2+ in water by naked eyes. Hg2+ in aqueous solution can be detected by instruments in the range of 0.5 to 150 mM. The novelty of this study lies on both the development of a new type of mineral-dye composite material, as well as its practical applications for fast detection.
Based on the phenomenon of film rerun in the context of new media era, this paper analyzes the differences between the two film reruns, expounds its function and influence on the film rerun from the perspective of new media communication, and analyzes the changes of the audience to explain the significance of the film rerun and the film communication culture under the new media communication. Keywords:Mass Communication,Movie Communication,Re-release Film,The Lord of the Rings INTRODUCTION 1.1The influence of new media on film marketingAs a kind of culture and art, film is also a kind of consumer goods. Its use value is to bring spiritual enjoyment to the audience. Once its plot, actors and directors bring disappointment to the audience, it will bring bad publicity effect to the related films in the future. On the contrary, a good film will make the audience unforgettable for a long time, and repeatedly aftertaste after walking out of the cinema, in the future when there are relevant director or actor of the film will make the audience want to continue to go into the cinema to support, this is the effective role of the film market brand mechanism.However, the development of new media and communication methods has increased the effect on this situation. In today's society, as a network era, the fast speed of communication and the number of communication channels have played an important role in the film industry. [4] This has brought both advantages and disadvantages. A film will have more ways of publicity, let more people know about the work and make more interest, whether positive or negative news, will increase the curiosity of the masses, so the popularity and economic status will increase. On the contrary, in the short term or even in the long term, a controversial film will become the object of more entertainment. For example, we-media operators will constantly use this work to provide their own heat, both in good direction and bad direction, such as douban rating, such as film explanation. It's possible that in ten years' time, when people are talking about good movies or bad movies, a superhot movie will appear again. This is the importance and change of communication to film.The progress of The Times promotes the rapid development of new media, and the modes of communication are constantly changing and enriching. New media are making continuous progress. At the same time, the film industry cannot be ignored, the film
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