Environmental impact assessment of southern tehran wastewater treatment plant using life cycle assessment (LCA).

The population has increased in recent decades, and as a result, the increase in urban wastewater has led to many environmental problems. In this study, the environmental impacts of the Southern Tehran treatment plant were assessed via life cycle assessment (LCA) (SimaPro 9.4.

UV-light-responsive Ag/TiO/PVA nanocomposite for photocatalytic degradation of Cr, Ni, Zn, and Cu heavy metal ions.

The rapid growth of industrialization has led to the uncontrolled pollution of the environment, and rapid action is needed. This study synthesized Ag/TiO/polyvinyl alcohol (PVA) nano photocatalyst for promising light-derived photocatalytic removal of heavy metal ions. The design of experiment (DOE) was used to study the effect of important factors (pH, reaction time, and photocatalyst dosage) to maximize the final performance of the photocatalyst.

Degradation of phenol in wastewater through an integrated dielectric barrier discharge and Fenton/photo-Fenton process.

In this study, a non-thermal dielectric barrier discharge-Fenton/photo-Fenton process was investigated to remove phenol from synthetic wastewater. The changes and optimal values of influencing parameters, including treatment time, iron concentration, phenol initial concentration, and pH, were investigated based on the central composite design (CCD) method. The presence of 0.

Comparing removal of synthetic anthraquinone dye wastewater in an electrical discharge and UV-LED/WO reactors: using statistical Taguchi optimization approach.

Advanced oxidation processes (AOPs) are an available solution for the rapid growth of the water pollution problem. In the present study, the process of UV-LED/WO and plasma was comparatively studied to remove reactive blue 19. The photocatalyst process efficiency was analyzed by statistical Taguchi model.

Highly efficient photodegradation of raw landfill leachate using cost-effective and optimized g-CN/SnO/WO quantum dots under Vis-NIR light.

In this study, photodegradation of raw landfill leachate under Vis-NIR irradiation and sunlight has been investigated using optimized g-CN/SnO/WO quantum dots as a novel nanocomposite. g-CN/SnO/WO QDs was successfully synthesized and characterized using various analyses. The best mixing ratios of the nanocomposite components were obtained by response surface methodology (RSM).

Removal of Cd(ӀӀ) and phenol using novel cross-linked magnetic EDTA/chitosan/TiO nanocomposite.

In the present study, a novel cross-linked magnetic EDTA/chitosan/TiO (MECT) was prepared as eco-friendly and efficient bioadsorbent for the removal of Cd(II) ions and phenol from aqueous solution. Magnetic chitosan was improved by surface functionalization and cross-linking of it with EDTA and photocatalytic with TiO. The nanocomposite was characterized by FE-SEM, EDX, FTIR and XRD techniques and Cd(II) ions adsorption and phenol degradation under varied experimental conditions were investigated.

Prediction of coagulation and flocculation processes using ANN models and fuzzy regression.

Coagulation and flocculation are two main processes used to integrate colloidal particles into larger particles and are two main stages of primary water treatment. Coagulation and flocculation processes are only needed when colloidal particles are a significant part of the total suspended solid fraction. Our objective was to predict turbidity of water after the coagulation and flocculation process while other parameters such as types and concentrations of coagulants, pH, and influent turbidity of raw water were known.

Dataset of producing and curing concrete using domestic treated wastewater.

We tested the setting time of cement, slump and compressive and tensile strength of 54 triplicate cubic samples and 9 cylindrical samples of concrete with and without a Super plasticizer admixture. We produced concrete samples made with drinking water and treated domestic wastewater containing 300, 400 kg/m(3) of cement before chlorination and then cured concrete samples made with drinking water and treated wastewater. Second, concrete samples made with 350 kg/m(3) of cement with a Superplasticizer admixture made with drinking water and treated wastewater and then cured with treated wastewater.

Application of concrete surfaces as novel substrate for immobilization of TiO2 nano powder in photocatalytic treatment of phenolic water.

Background: In this study, concrete application as a substrate for TiO2 nano powder immobilization in heterogeneous photocatalytic process was evaluated. TiO2 immobilization on the pervious concrete surface was done by different procedures containing slurry method (SM), cement mixed method (CMM) and different concrete sealer formulations. Irradiation of TiO2 was prepared by UV-A and UV-C lamps.

Application of artificial neural networks for prediction of photocatalytic reactor.

In this paper, forecasting of kinetic constant and efficiency of photocatalytic process of TiO2 nano powder immobilized on light expanded clay aggregates (LECA) was investigated. Synthetic phenolic wastewater, which is toxic and not easily biodegradable, was selected as the pollutant. The efficiency of the process in various operation conditions, including initial phenol concentration, pH, TiO2 concentration, retention time, and UV lamp intensity, was then measured.