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The use of antibiotics and dyes has resulted in severe water pollution and health risks; therefore, it is urgent to remove them from water sources. Among the most common methods for removing harmful water contaminants, adsorption and photodegradation are the most economical, simple, and reusable. Due to their high porosity, adjustability, and crystal structure, metal-organic frameworks (MOFs) are one of the effective adsorbents and photocatalysts. A typical MOF material is zeolitic imidazolate framework-8/67 (ZIF-8 and ZIF-67), comprising essentially of the metal atoms Zn and 2-methylimidazole (2- MIM). ZIF-8 and ZIF-67 have unique properties that make them efficient in water treatment due to high adsorption capacities and being good hosts for photocatalytic materials. In this article, a review study of the design and methods of synthesis of ZIF-8 and ZIF-67 composites is presented. An introduction to the current research on the role of ZIF-8 and ZIF-67 compounds as adsorbents and photocatalysts for wastewater pollution removal is provided. In this review study, we aim to supply a mechanistic perspective on the use of ZIF-8/67 composites in wastewater purification and present novel visions for the development of extremely effective ZIF-8/67-based adsorbents and photocatalysts. To unlock the full potential of ZIF-8/67 composites in dye and antibiotic removal and water recycling, current difficulties will be discussed in detail.

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The increase in pollutants such as hazardous refractory contaminants, organic dyes, pharmaceuticals, and pesticides entering water resources on a large scale due to global population growth and industrialization has become a significant health concern worldwide. The two-dimensional (2D) MXene material is a new type of transition metal carbide or carbonitride material, which has demonstrated the capability to adsorb various heavy contaminants, particularly metals such as chromium, copper, lead, and mercury. In addition, MXenes have a tunable band gap (0.92–1.75 eV) and exhibit good thermal stability and considerable damage resistance, which means that they are well suited as adsorbents for waste removal. In this review article, MXene nanocomposites are introduced for the removal of pollutants from water. The idea of water remediation, the applications of MXene-based nanocomposites, and the effects on the degradation of water and wastewater contaminants are reviewed. Future trends in MXene-based nanocomposites for water treatment and environmental applications will also be discussed.

In today’s business world, due to the constant changes and complexity of the situation in different fields, managers need to adopt marketing strategies to achieve competitive advantage and pioneer their target markets. One of the most effective approaches to formulation is the SWOT approach. The purpose of this study was to investigate the marketing strategy of knowledge-based companies in the northwest of the country and to create a SWOT matrix using a mixed research method to select the best marketing strategy. The statistical community in the qualitative section consisted of 30 managers, experts, consultants and support and related units in the surveyed companies. Participants in the quantitative section were also 100 persons, 80 of whom were selected according to Morgan table by simple random sampling. The data collection tools were qualitative interviews, focal interviews and quantitative questionnaires. The coding method, hierarchical analysis method was used for data analysis. The results of the focal interviews showed that 5 points were put into perspective. The results of Question 2 and 3, respectively, indicated that the threat of opportunity was greater and the strength of the weakness was higher, reflecting the position of companies in the home of competitive strategy (ST).