Chemical oxygen demand (COD) is a synthetical indicator which represents the degree of organic pollution in water. The near-infrared (NIR) transmission and the UV absorbance method based on photoelectric detection technology and spectroscopy analysis have some advantages such as high precision, speed, non-contact, no secondary pollution etc compared to conventional wet chemical method. The NIR ...

An updated version of the semi-analytical model for describing the steady-state concentration in the atmospheric boundary layer is presented here. Two inversion methods of the Laplace transform are tested: the Gaussian Quadrature scheme and the Fixed-Talbot method. The model takes into account settling velocity, removal (wet and dry deposition), and first order chemical reactions. The capabilit...

A simple and versatile method for making chemically patterned anisotropic colloidal particles is proposed and demonstrated for two different types of patterning. Using a combination of thermo/mechanical stretching followed by a wet chemical treatment of a sterically stabilized latex, both patchy ellipsoidal particles with sticky interactions near the tips as well as particles with tunable fluor...

Chemical agglomeration can reduce the particulates (including PM2.5) concentration emitted from fly ash particulates and the wet flue gas desulfurization (WFGD) system. However, the calcium-based slurries affect the regulation of agglomeration compared to water, in particular, the wettability of the particulates and the viscosity of the calciumbased slurry. The wettability and the viscosity are...

Patterned deep UV-irradiation of cured polydimethylsiloxane (PDMS) followed by wet-chemical etching is a convenient method to create microstructures in this material with structural depths up to 10 μm. The intrinsic elasticity of many polydimethylsiloxanes allows the introduction of a new parameter influencing the patterning process: elongation. Symmetric stretching during the irradiation, subs...

Clay from deposit Bilalovac, Central Bosnia, was characterized by chemical, IR, XRD and DTA/TG analysis. The major mineral components are kaolinite, illite, muscovite and quartz. Raw clay may be used for pottery products and terracotta. Clay was beneficiated by wet method removing fraction over 20 μm. Beneficiation process increased content of kaolinite and decreased content of quartz. Benefici...

Abstract— Porous Hydroxyapatite (HAP, Ca10(PO4)6(OH)2 possessing bioactivity, biocompatibility, solubility and adsorption is highly useful as a biomaterial in various applications . Pure HAP nanoparticles were synthesized at moderate temperatures by wet chemical synthesis and subjecting it to combustion method with a organic fuel ( ascorbic acid). The X-ray diffractometry (XRD) and Fourier tran...