Reduction of membrane fouling in reverse osmosis systems and elimination of scaling of heat transfer surfaces in thermal plants are a major challenge in the desalination of seawater. Precipitation softening has the potential of eliminating the major fouling and scaling species in seawater desalination plants, thus allowing thermal plants to operate at higher top brine temperatures and membrane plants to operate at a reduced risk of fouling, leading to lower desalinated water costs. This work evaluated the use of precipitation softening as a pretreatment step for seawater desalination. The effectiveness of the process in removing several scale-inducing materials such as calcium, magnesium, silica, and boron was investigated under variable conditions of temperature and pH. The treatment process was also applied to seawater spiked with other known fouling species such as iron and bacteria to determine the efficiency of removal. The results of this work show that precipitation softening at a pH of 11 leads to complete elimination of calcium, silica, and bacteria; to very high removal efficiencies of magnesium and iron (99.6 and 99.2 %, respectively); and to a reasonably good removal efficiency of boron (61 %).

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Background and Aims: Quality of care has transformed to become an essential element of healthcare service delivery, which caused decision makers in Health Care Organisations (HCOs) to seek methods to evaluate the level of care provided. The field of accreditation is under massive development, especially in healthcare organizations. Joint Commission International (JCI) accreditation is one of the accreditation bodies that require a lot of documentation and quality improvement to guarantee proper standard application. The process of accreditation is known to be demanding and requires staff involvement to guarantee successful implementation.Methods: This study focuses on the impact of JCI standards implementation on staff productivity and motivation in a 350-bed hospital. An interpretive approach was used to collect empirical data by interpreting the population's behavior, which is represented in this study by the questionnaire. The study is considered an emergent study that identified, explained, illustrated, and developed a model of staff motivation. In this type of study, the process of inquiry, supporting arguments, and questions of interest is developed after the launching of the study and during the process of data collection. Thus, the researcher relied on the social constructive paradigm, whereby the grounded theory (GT) is used to build the research model of staff motivation during the process of accreditation.Results: By studying the Turn Around Time (TAT) performance indicator, the study showed that TAT of tests decreased by 3% after JCI standards implementation, which was reflected at two different laboratory sections. The trainings conducted throughout the process of standards implementation also resulted in enhancing the quality of samples, which was demonstrated by the decrease in the percentage of rejected samples. Conclusion:Staff productivity increases when JCI standards are implemented. However, staff motivation is dependent on their involvement with management decisions and the smooth transition through change management, which ensures staff retention and therefore increase productivity.

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