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This study was aimed to prepare carbon-coated magnesium oxide (C-MgO) nanoparticles and investigate the catalytic activity of C-MgO in catalytic ozonation process (COP) for treating a real textile wastewater. A fractional factorial design was conducted to assess the interactions between operating parameters (pH, ozone flow rate, catalyst dose, reaction time) for the catalytic treatment of the textile wastewater via the C-MgO catalyst. The experiments of degradation and mineralization results matched well with those attained by the predicted models. Fractionate of the contribution reactive oxygen species (ROSs) and O3in COD removal indicated that ROSs had a dominant role in the mineralization of the recalcitrant compound in examining the textile wastewater sample. C-MgO showed better potential catalytic activities (synergetic effect = 57%) as compared with plain nano MgO and O3alone in COD elimination. The catalytic activity findings demonstrated that the mineralization rate of the COP with the C-MgO catalyst was 5.7 times that of the plain nano MgO/O3process. Based on the results, this report showed that the C-MgO catalyst could be applied in COP for treating real textile wastewaters.

Sex cord-like differentiation has been well documented in endometrial stromal tumors. On the basis of the extent of sex cord differentiation, uterine stromal tumors with this kind of differentiation have been classified into 2 subgroups of endometrial stromal tumor with sex cord-like elements and uterine tumors resembling ovarian sex cord tumor. When extensive, this differentiation has been accompanied with indolent clinical behavior and rather good prognosis in most cases. Sex cord differentiation has been rarely observed in uterine mullerian adenosarcoma. Only 3 cases of such occurrence have been reported in the English literature. Herein, we report a case of uterine mullerian adenosarcoma extensively overgrown by uterine tumor resembling ovarian sex cord tumor in a young woman. The presence of an ovarian sex cord tumor component has been confirmed by immunohistochemistry. To the best of our knowledge, this is the second report of such a case in the English literature.

A new PVC membrane electrode for Hg(II) ion based on a recently synthesized mercapto compound of 2-benzoylamino-3-(4-chloro-phenyl)-thioacrylic acid S-(2-mercapto-4-methyl-phenyl) ester is reported. The electrode exhibits a Nernstian response for Hg²⁺ ions over a wide concentration range (2.0×10⁻⁷–3.0×10⁻² M) with a slope of 29 (±1). The limit of detection is 5.0×10⁻⁸ M. The proposed sensor revealed good selectivities over a wide variety of other cations include hard and soft metals. This electrode could be used in a pH range of 1.0–4.0. It was used as an indicator electrode in potentiometric titration of mercury(II) ions and can be used in the direct determination of Hg²⁺ in aqueous solutions.

A new PVC membrane electrode for Hg(II) ion based on a recently synthesized mercapto compound of 2‐benzoylamino‐3‐(4‐chloro‐phenyl)‐thioacrylic acid S‐(2‐mercapto‐4‐methyl‐phenyl) ester is reported. The electrode exhibits a Nernstian response for Hg2+ions over a wide concentration range (2.0×10−7–3.0×10−2M) with a slope of 29 (±1). The limit of detection is 5.0×10−8M. The proposed sensor revealed good selectivities over a wide variety of other cations include hard and soft metals. This electrode could be used in a pH range of 1.0–4.0. It was used as an indicator electrode in potentiometric titration of mercury(II) ions and can be used in the direct determination of Hg2+in aqueous solutions.

Due to the growth in the human population globally, it is noted that various industries have also grown. The need for an excess supply of water and the generation of high effluent quality upon proper treatment technologies has become a necessity. These two crucial needs can be achieved with the aid of membrane bioreactor (MBR) that has been proven to be effective in removing organic and inorganic matters as a biological unit for wastewater treatment. MBR plants are created by integrating the biological process with membrane filtration which possesses numerous benefits if compared with conventional methods such as activated sludge; MBR is widely used for municipal and industrial wastewater treatment. This review addresses basic concepts of MBRs plants and subsequently provides information on the recent developments of each part related to MBR plants. The characteristics of the bioreactor treatment process is discussed in detail, and then a comprehensive review of the membrane separation process is examined. The fouling phenomena as a main obstacle to widespread MBRs plant is presented in detail with recent fouling mitigation methods. The efforts of a number of novel MBR processes are summarized. In order to tackle the existing limitation of MBRs to be practical on a larger scale, the existing challenges and future research efforts are proposed.