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Preparation of chelating resin to be used in the removal of heavy metal ions from solutions.

Chelating resin based on poly (glycidyl‐methacrylate‐co‐N, N‐methylene‐bis‐acrylamide) containing ethylenediamine was synthesised and used in removal of heavy metals from solutions.

The optimal pH values for adsorption of different metal ions occur in the range 4.0‐10.0 depending on the metal ion used. The adsorption of metal ions increases with increasing treatment duration to reach to the equilibrium state. Also, the adsorption of metal ions depends on the degree of cross linking of the chelating resin, and a higher degree of cross linking results in a lower degree of metal ion adsorption. The chelating resin was highly effective for the collection of metal ions by batch and column methods. The metal ions adsorbed could be eluted with 2M HNO₃ except Co²⁺ and the resin could be reused.

The different factors affecting the metal ions (Cu²⁺, Co²⁺, Cd²⁺, Zn²⁺, Pb²⁺ and Hg²⁺) loading in resin such as pH, contact time and cross linking density were studied.

The practical applicability of the chelating resin for final stage of waste water treatment is recommended for use as a polishing agent.

The resins prepared were used successfully in removing heavy metals from water.

The purpose of this paper was to synthesize novel antibacterial reactive dyes for dyeing cotton fabrics.

Four synthetic novel antibacterial reactive dyes based on sulfonamide (D1-D4) have been synthesized by the coupling reaction of sulfonamide diazonium salt with sulfonamido-cyanurated 7-amino-4-hydroxynaphthalene-2-sulfonic acid “j-acid”. The chemical structure of the synthesized dyes was secured by their spectral data [infra red (IR) and proton Nuclear magnetic Resonance (1HNMR)].

The prepared reactive dyes (D1-D4) were applied to cotton fabrics. Optimum conditions of the dying samples at sodium sulfate 100 g/l, liquor ratio (L.R.) 1:10, sodium carbonate 20 g/l at 80°C (D1, D2 and D4), 60°C (D3 for 60 min) were investigated. The fastness properties toward washing, perspiration, rubbing and light were evaluated. Dyed fabrics showed good light fastness property and good to very good washing and perspiration fastness properties according to the gray scale. Antimicrobial activities for synthesized dyes showed excellent activity against gram-negative organisms such as Pseudomonas aeruginosa and Proteus mirabilis faecalis, whereas very good activity against gram-positive organisms such as Staphylococcus aureus and Enterococcus faecalis with respect to the standard drugs ampicillin and chloramphenicol.

The principle advantages in this study were that the synthesis of novel synthesized dyes by introducing bisulfonamide-based moieties to increase the antimicrobial activity of the cellulose fabrics could be used as a medical textile, short reaction time and reaction procedure conducted in few steps, the work up is convenient and thus the starting material can be easily prepared.

The purpose of this paper is to introduce the concept of socially responsible human resource management (SRHRM) and examine the reflection of SRHRM on sustainable development (SD) in Egyptian companies.

The study data was collected using a quantitative method to examine and test the relationship between the two variables. An empirical study was conducted between 2022 and 2023 on 150 samples of male and female employees from 18 companies located in Egypt working in castings and car batteries.

The study found that, in general, SRHRM has a significant impact on organizational sustainability. This contribution is also beneficial for general HRM and corporate social responsibility (CSR) literature as it stresses the importance of its relations to SD. By critically analyzing contemporary SRHRM literature, this study further demonstrates how studies with utilitarian approaches have dominated earlier research. By recognizing the necessity for process-oriented studies and the significance of critical scholarship within the field of SRHRM and its connections to the SD, the researcher thereby creates a research agenda for future studies.

The findings only apply to the sample that has participated in this study and to the Egyptian companies. A longitudinal quantitative evaluation of the SRHRM approaches and dimensions and their impact on the SD strategies of Egyptian companies would be recommended in terms of further research study, highlighting the role of SRHRM and its impact on achieving companies' CSR strategies.

The study's findings are helpful for firms looking to implement SR-HRM to enhance some employees' performance and promote organisational sustainability. In Egypt, there is a dire need for responsible leadership in the public and private sectors, which is crucial in the market and industry sectors. In addition to updating all policies, urge the younger generation to participate in them. For example, new hires to the company must demonstrate that they have engaged in volunteer work as part of their social obligation to the community, and this is required for recruitment.

Furthermore, refreshing all the policy encourage the young generation working or before working to take part in these policy, such as newcomers to the companies have to show that they have conducted some social responsibility towards their community as voluntary work. A study conducted by Cristina del-Castillo et al. (2022) confirmed that regarding the performance of different factors, the results show that the organizations under study are investing too much effort in improving CSR factors that are less relevant to achieving positive legitimacy assessments. On the one hand, resources destined to improve policies related to health, security and social benefits and those regarding the improvement of the relationship paths between managers and employees are excessive considering the relevance that they represent compared to the rest of the CSR policies. According to Hazzi and Maldaon (2023), stakeholders (including the general public and policymakers) might make an informed choice about how much organizations with CSR could safeguard their well-being if they had access to transparent CSR information. Talking about the sustainability behaviour of SRHRM as crucial for embedding sustainability in the business, a study by Abutaleb et al. (2021) evidence that subjective norms and attitudes, followed by perceived behavioural control and personal norms had the greatest influence on intentions towards behavioural HR. Attitudes towards sustainability practices were significantly influenced by economic advantages and sustainability. A good model fit was demonstrated by measurement and structural models (Abutaleb et al., 2021).

This paper is unique in that it participates in presenting the concept of the social responsibility of HRM as an intervention and approach for SD. It also participates in presenting unique findings related to Egyptian companies. There is a scarcity of literature related to research and studies on SRHRM in Egypt.

White pine wood was impregnated with a mixture of methyl methacrylate (MMA) and N‐methacryloyloxyphthalimide and by other three mixtures prepared by mixing MMA and N‐methacryloyloxytetrabromo‐phthalimide. Water uptake of treated wood was found to be 54 per cent after water‐soaking test of 168 h and maximum antiswell efficiency was found to be 48 per cent for treated wood samples with non‐brominated comonomer mixture.

This chapter investigates the effect of customer orientation and CRM organization on hotel financial performance. A model of enhancing hotel financial performance through customer satisfaction practices was tested. Customer satisfaction was hypothesized to be a mediator in the relationships between customer orientation and CRM organization and the result being financial performance. The sample consisted of 54 hotels that was made up of three 5-star, fifteen 4-star, and thirty-six 3-star hotels in Ghana. A quantitative deductive approach was employed to gather data using cross-sectional survey, which was analyzed using PLS-SEM to check the validity, reliability and factor loading of the data. The findings revealed that, CRM organization enhances customer satisfaction and financial performance of hotels. Also, customer orientation showed significant positively related to customer satisfaction in the hotels. Surprisingly, the effects of CRM organization and customer orientation on financial performance through customer satisfaction were insignificant. Thus, customer satisfaction failed to mediate the effect of CRM organization and customer orientation on the financial performance of hotels. This suggests that though an effective CRM organization enhances customer satisfaction, it directly affects the financial performance of hotels. The outcomes have useful implications for CRM implementation on hotel financial performance in Ghana.

The purpose of this paper is to develop a new methodology to find out the best robotic assembly sequence amongst feasible robotic sequences.

The feasible robotic assembly sequences were generated based on the assembly constraints and later and artificial immune system (AIS) was implemented to find out the best assembly sequence.

The paper reveals the best assembly sequence.

Robotic assembly has expanded the process capabilities in the manufacturing world because of the fact that it is faster, more efficient, precise and cost‐effective process than any conventional mechanized process. Since a robotic system is a cost‐intensive one it is necessary to find out the correct and optimal sequence with the constraints of the process in mind while dealing with assembled products with large number of parts.

The contemporary urban fabrics in hot climate regions have overextended urban spaces that face problems of high heat stress due to intense solar radiation and air temperature and that cause the pedestrians to abandon the urban spaces due to thermal discomfort. This work introduced the shading effects as one of the prime factors that contribute to restore thermal comfort and attract pedestrian activities. The purpose of this paper is to identify the proportional limits of the urban space to maintain feasible shades for pedestrian activities.

The urban space abstracted into a floor surrounded by four walls was then classified into four typologies. The assessment tool was developed to calculate the shading efficiency at the floor level of urban space. The width and the length of the floor equally was expanded in the range (0.5/0.5 to 4.0/4.0). The average shading efficiency of the expanded typologies was calculated along three intervals (Morning, midday and afternoon). The results were then analyzed, and critical guidelines were established that could be utilized in the design of the futuristic urban space and provide amendments to the existing urban space.

The paper concluded that the performance of urban spaces was not due to the accumulative performances of all walls but rather due to the combination specific effective walls in response to the interactive variations shading patterns concerning daily pedestrian activities. Any large shallow urban space could be segmented into multiples of the recommended typologies by a vertical landscape.

It is the first study that identified the expansion limit of the urban space that maintains feasible shades for the pedestrian. A further value of this study is establishing guidelines to the urban designers for the effective configurations of the urban space in terms of shading. These guidelines could be utilized in the design of the futuristic urban space and provide amendments to the existing urban space.

This research studies the impact of introducing distributed generators (DGs) into a distribution network. The aim of this paper is to optimally site DGs based on economic, environmental and reliability indices are presented.

The considered network was modelled by using the network’s line parameters and capacity of the load bus with the help of Power System Analysis Toolbox. The location of the DG is based on voltage stability index and power loss reduction index. The DG energy sources considered are the diesel generator, solar photo-voltaic (PV) and wind generator, and the objectives were to minimize cumulative cost while maximizing reliability of the network. The Advanced Interactive Multidimensional Modelling System was used for the mathematical modelling.

The obtained results in the cases of introducing renewable energy into a network improves network performance. The benefits of renewable energy on the distribution network measured in terms of electricity production cost, gas emission cost, fuel cost and value of energy not supplied were positive. The research also showed that the total benefit of renewable energy reduces as the price of the renewable generators increases.

This paper introduces a new approach to determining the optimal location of DG for reducing line losses and improved voltage profile. A new cost modelling function based on external grid power transfer cost, technical losses and cost because of the various energies source is also introduced.

The purpose of this paper is to investigate a fuzzy hybrid approach for ranking the flare gas recovery methods and allocating to refineries.

The proposed approach is containing four stages: in the first stage, experts' assessment is applied to identify relevant criteria and sub-criteria in the evaluation of flare gas recovery methods. In the second stage, the corresponding weights of criteria and sub-criteria are determined via fuzzy decision-making trial and evaluation (DEMATEL)-analytical network process (ANP) (DANP) method. In the third stage, the flare gas recovery methods are ranked using fuzzy weighted aggregated sum product assessment method (WASPAS) multi-criteria decision-making (MADM) technique. In the fourth stage, an optimization model is developed to allocate gas recovery methods to refineries while maximizing the total utility of allocations based on model constraints.

According to the results of fuzzy DANP method, technical and operational criterion was the most important followed by economic, political, managerial and environmental criteria. With respect to sub-criteria, international sanctions and political stability were the most important. The results of fuzzy WASPAS method indicated that gas injection was the first ranked alternative. Finally, the mathematical modeling allocated the recovery methods to five refineries of South Pars gas field in Iran based on budget and time constraints.

The proposed approach provides a systematic tool in the selection of flare recovery methods and allocation to refineries. This approach uses a new combination of fuzzy DEMATEL-ANP (DANP) method, fuzzy WASPAS method and mathematical programming. The approach is effectively implemented in a case study for ranking the flare gas recovery methods and allocating to refineries of South Pars gas field in Iran.