Is Technology Stealing Our Jobs? The Impact of the Fourth Industrial Revolution on the Hotel Industry Workforce

The recent technological advancements have had everyone in awe of the fast development and benefits they bring along. However, they have also started a heated conversation among scholars, companies and employees who are concerned about what changes this Fourth Industrial Revolution is going to bring, and how it will affect the workplace. Through examining the history of automation, existing HR challenges in the modern era, current technological implementation and the skill demand in such new environment, the aim of this paper was to verify whether or not the hotel industry jobs are susceptible to automation. By conducting an extensive meta-analysis, the author of this research demonstrates that the future is brighter than it might seem. Jobs will evolve and technology will have a major impact on hotel industry yet these jobs remain highly dependent on human, soft skills, demanding a switch in focus from occupation to tasks approach, and setting a higher focus on the individuals’ skill-set and its proper utilization

Is Technology Stealing Our Jobs? The Impact of the Fourth Industrial Revolution on the Hotel Industry Workforce

The recent technological advancements have had everyone in awe of the fast development and benefits they bring along. However, they have also started a heated conversation among scholars, companies and employees who are concerned about what changes this Fourth Industrial Revolution is going to bring, and how it will affect the workplace. Through examining the history of automation, existing HR challenges in the modern era, current technological implementation and the skill demand in such new environment, the aim of this paper was to verify whether or not the hotel industry jobs are susceptible to automation. By conducting an extensive meta-analysis, the author of this research demonstrates that the future is brighter than it might seem. Jobs will evolve and technology will have a major impact on hotel industry yet these jobs remain highly dependent on human, soft skills, demanding a switch in focus from occupation to tasks approach, and setting a higher focus on the individuals’ skill-set and its proper utilization

Statistical interpretation of carbon dioxide emission in the photocopying process

The concentration levels of carbon dioxide, monitored in indoor of three photocopying shops in Novi Sad, Serbia, were subjected to two-way ANOVA, in order to investigate statistically significant emission, due to the different sampling points and time intervals. Obtained results pointed out that only selection of time interval significantly affects the emission of carbon dioxide. In addition, the least significant difference test indicated that second time interval has the greatest influence on the CO2 emission, whereas the CO2 concentrations of the second time interval were subjected to further cluster analysis. Hierarchical clustering grouped three photocopying shops into four clusters with similar CO2 concentration levels

Cadmium in industrial wastewater

The concentration of cadmium in the industrial wastewater discharged from the aluminium and copper metal processing industry was analysed. The samples of water and sediment were taken from the Dragića Stream and the river Đetinja, downstream from the place where the wastewater from the metalworking industry flows into the Dragića Stream. According to the measured metal concentrations in the water and pursuant to the Regulations on Hazardous Substances in Water, issued by the Republic of Serbia, the water from the Dragića Stream belongs to the II class. Based on the obtained results, it was determined that the amount of metals in the water samples taken during the spring/summer season was relatively low, and that cadmium was dominantly present in the sediment

Unfired clayey pellets as the adsorbents for metal ions removal from a waste printing developer

The paper analyses the application of various forms of unfired clay pellets (whole and half), for the removal of zinc and copper ions from a waste printing developer. The adsorption experiments were performed in batch mode. The textural properties of defined clayey pellets were examined by mercury porosimetry. Textural characterization showed a significant amount of the small pores in the case of whole pellets in relation to half pellets. The efficiency of the metal ions removal significantly increases with the increase of the adsorbents mass. The removal efficiency varied between 50 and 94%. Considering the adsorption efficiencies, the following order of unfired clay pellets was noticed: whole pellet > half-pellet. The ionic radius of metal ions and the obtained trends of adsorption efficiency show that the selectivity sequence of metal ions on the unfired clay pellets was Zn > Cu. Therefore, the unfired clayey adsorbents present the promising alternatives for purification of waste printing developers

Purification of magenta dye aqueous solution with fenton-like oxidation process

In this study, heterogeneous Fenton oxidation processes is applied, with the usage of nZVI as a catalyst. Greener than the conventional Fenton process, it combines the advantages of nZVI reduction and Fenton oxidation. According to the central composite design and the analysis of variance, the model presents medium R2 value of 73.02% for the Magenta removal. At the 60 min of contact time, dye removal efficiency raised more than 40% and 70% with the increase of hydrogen peroxide concentration and pH decrease, respectively. The experimental results indicate that the oxidation process leads to the reduction in dye concentration up to 97%, confirming the application possibility of Fenton-like oxidation process for the dye removal from the aqueous solution

Optimization of homogenous fenton process using definitive screening design applied for flexographic printing wastewater

The treatment of flexographic cyan dye synthetic solution and real printing effluent has been studied by using homogeneous Fenton process with the addition of FeSO4*7H2O as a catalyst. The study demonstrate that applied treatment could significantly reduce dye concentration in the examined aqueous solutions. Operating parameters, such as initial dye concentration, iron dosage, hydrogen peroxide concentration and pH were varied to investigate their influence on decolorization efficiency, as well as their mutual interactions. The optimal conditions, found with definitive screening design (DSD) statistical method, were: dye concentration = 123 mgL-1 , Fe concentration = 60 mgL-1 , H2O2 concentration = 5.44 mM and a pH value = 2. Under these conditions decolorization efficiency resulted with 87% and 37% for cyan synthetic solution and real printing effluent, respectively

Formulation of zeolite supported nano-metallic catalyst and applications in textile effluent treatment

Textile industry is one of the major industries worldwide and produces a huge amount of coloured effluents. The presence of coloured compounds (dyes) in water change its aesthetic value and cause serious health and environmental consequences. However, the present investigation was carried out to minimize and reduce the colour compounds discharged by the textile industries through a nano-scaled catalyst. This study is mainly focused on the explanation of nanoparticles aggregation by deposition on natural zeolite, and utilization of this natural zeolite as supported material to nano zerovalent iron (NZ-nZVI) in the form of liquid slurry with sodium percarbonate acting as an oxidant in a Fenton like system for the removal of synthetic CI acid orange 52 (AO52) azo dye, in textile effluent. The nano-scaled zerovalent irons were synthesized by borohydride method in ethanolic medium. UV–vis spectrophotometry, FTIR, EDX, SEM, and XRD (powdered) analysis were used for the investigations of surface morphology, composition, and properties of natural zeolite supported nZVI and study the dye removal mechanism. The XRD spectrum revealed that clinoptilolite is the major component of natural zeolite used, while EDX found that the iron content of NZ-nZVI was about 9.5 %. The introduction of natural zeolite as supporting material in the formation of iron nanoparticle resulted in the partial reduction of aggregation of zerovalent iron nanoparticles. The findings revealed that the 94.86 % removal of CI acid orange 52 dye was obtained after 180 min treatment at 15 mg/L initial dye concentration. The highest rapid dye removal of about 60 % was achieved within the first 10 min of treatment at the same dye concentration. Furthermore, the actual dyeing effluent including green, magenta, and the blended colour was successfully decolourized by natural zeolite-supported nZVI/SPC Fenton process. It is concluded that the acceleration of corrosion of NZ-nZVI, breaking of azo bond, and consumption of Fe2+ were the possible mechanisms behind the removal of AO52 dye. It is also recommended that NZ-nZVI/SPC Fenton process could be a viable option for effluent and groundwater remediation

Optimization of Cyan flexo dye removal by nano zero-valent iron using response surface methodology

Application of nano zero-valent iron (nZVI) as a catalyst in a decolorization process is a simple and sensitive method for Cyan flexo dye removal from the aqueous solution. In this paper, a central composite design (CCD), under the response surface methodology (RSM), was applied in order to optimize experimental conditions of the Cyan removal from aqueous solution. The influence of four independent variables was studied: nZVI dosage (5–45 mg L-1), initial dye concentration (2–14 g L-1), pH (2–10) and removal time (20–100 min), in order to build second order quadratic model and to predict the responses. The highest removal percent of 96.35% was attained, and the optimum parameters are achieved after 1h/24h precipitation: nZVI dosage (5/45 mg L-1), initial dye concentration (2/14 g L-1), removal time (20/100 min) and pH (2/10). The Cyan removal efficiency of 38% and 62% were estimated under optimized experimental conditions