Water treatment

In this paper, montmorillonite–Cu(II)/Fe(III) oxides magnetic material was prepared and used for removal of harmful algae from water. The material was prepared by the supporting of Cu(II)/Fe(III) oxides on pillared montmorillonite and was characterized by XRD, zeta potential measurements. The result

The paper describes the preliminary researches on the influence of the ultrasounds of diversified intensity (22 and 24 kHz) on the content iron compounds in water. For the researches, variable operational parameters were used, such as: the vibration amplitude and the exposure time (1–5 min). The sub

The inhibition performance of three synthetic amine/ammonium-containing cationic polymers in colloidal silica particle growth is reported. The three additives are compared to control (no additives present during silicate polymerization). The three polymers, polyethyleneimine (PEI), polyallylamine hy

A study of the scale inhibition in water solutions induced by a galvanic device known as the “allotropic cell” is presented. The scale inhibition effect is related to the release of metal ion impurities of Zn+2 and Cu+2 from the surface of the device. An induced crystal structure modification of the

With the recent emergence of endocrine disrupting compounds, pharmaceuticals, and personal care products (EDC/PPCPs) as an important potable drinking water and reclaimed wastewater quality issue, our study has investigated the removal of EDC/PPCPs of 27 compounds by nanofiltration (NF) and ultrafilt

The results of studies are presented on the treatment of natural waters with a high content of organic compounds. The research involved unit processes of coagulation, microfiltration, and the hybrid process coagulation– sedimentation–microfiltration. In the membrane filtration process 19-channnel ce

According to date from the literature, steroidal sex hormones are present in water environments in very low concentrations, about 1 ng/l (yet for organisms they are physiologically active). Estradiol and ethinylestradiol were also found in drinking water samples at concentrations of up to 2.1 ng/l a

Boron removal is a critical issue in the production of drinking water and of ultra-pure water in the electronics industry. Boron rejection in a RO process is typically in the range of 40–60%. The objective of this study was to distinguish the factor contributing to enhanced boron rejection in reclam

Rotating reverse osmosis (RO), which is based on Taylor-Couette flow, offers a means to minimize flux decline due to concentration polarization and membrane fouling. However, the operating conditions play a significant role in determining the effectiveness of the system. In this study, the effect of

In cross-flow ultrafiltration permeate flux has three types of flow regimes. Initially it has a transient regime with a decreasing permeate flow rate. Then it attains a steady state, and the flux reaches a plateau. In the third stage the flow rate becomes independent of applied pressure and is calle