UV/PMS degradation mechanism of humic acid in water.

Abstract Using graphite powder, chitosan, and diatomite as raw materials, graphene oxide was first prepared by Hummer’s method GO carboxylated modified into hydroxylated (GOH). It then GOH via carboxylation, (DE) the magnetic chitosan (MCS) were supported on blending to generate composite GOH/DMCS. This novel studied determine its methylene blue wastewater adsorption capability. Results showed that at 45 °C, a dosage of adsorbent 1 g L −1 , pH 12, dye GOH/DMCS reached equilibrium after 120...

In this paper, the effects of coagulant type, compounding ratio, dosage, hydraulic conditions and water temperature were investigated through intensive coagulation.

Antibiotic-related environmental contamination directly threatens ecosystems and human health. Adsorption is an efficient simple treatment process for removing antibiotics from water environments.

To improve the adsorption and separation efficiency of lead-containing wastewater by graphene oxide (GO), attapulgite (ATP) was used through a simple hydrothermal reaction. The prepared GO characterized SEM, TEM, FTIR, XPS. properties were investigated. maximum capacity Pb2+ on as-prepared at pH 5 25 °C 450.9 mg/g. It is concluded that can be as high-efficiency adsorbent for wastewater.

Devising cost-effective electrochemical catalyst system for the efficient degradation of chlorinated aromatic compounds is urgently needed environmental pollution control. Herein, a Fe-ZSM-5 zeolite was used as suspended to facilitate lindane model pesticide in an consisting commercial DSA (Ti/RuO2-IrO2) anode and graphite cathode. It found that greatly accelerated lindane, with rate constant more than 8 times higher without Fe-ZSM-5. In addition, widened working pH range from 3 11, while...

This study addresses the problems of low product purity, current efficiency, and environmental pollution caused by excessive use selenium additives in electrolytic manganese (Mn) industry.It investigates effects composite on reducing (Se) usage while enhancing quality efficiency Mn products.The primary additive is an industrial minimum amount selenious acid (H2SeO3), with sodium sulfite (Na2SO3) dodecyl sulfate (SDS) as auxiliary additives.This research explores their impact membrane...

The solidified landfill disposal of hazardous solid waste such as electroplating sludge in arid/semi-arid areas has potential risks and hazards. In this study, the electrochemical method was used to destroy structures metal complexes release ions so that organics were removed by direct mineralization anode while recovered cathode. A SnO2/Ti electrode during electrolysis process. effect different current densities (10, 20, 30, 40, 50, 60 A/m2), pH values (2, 3, 4, 5, 6), presence chloride...

Given the problems of high energy consumption, low resource utilization, and severe environmental pollution in traditional electrolytic manganese or dioxide, this study puts forth a single-membrane double-chamber electrolysis method for cathodic electrodeposition manganese. Anode co-production dioxide recovery sulfuric acid anode chamber enable efficient utilization resources. The effects Mn2+ concentration, current density, temperature, cathode (NH4)2SO4, H2SO4 concentration on were...

In this study, graphene oxide (GO) was prepared using the improved Hummers’ method, and GO carboxylated modified into hydroxylated (GOH). Diatomaceous earth (DE), which exhibits stable chemical properties, a large specific surface area, high porosity, as well chitosan/magnetic chitosan, loaded by solution blending. Subsequently, oxide/diatomite/chitosan (GOH/DCS) oxide/diatomite/magnetic chitosan (GOH/DMCS) composites were through simple solid–liquid separation. The results showed that...

Fenton oxidation-activated carbon adsorption combination process was used for the treatment of ammunition disposal wastewater in an experimental station Lanzhou Corps District. The pilot plant tests indicated that decomposition efficiency affected markedly by impact factors oxidation. optimal parameters oxidation reaction, such as hydrogen peroxide concentration (0.1 mol /L), Fe <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2+</sup> (1.8 mmol...

Microplastics (MPs), as a novel pollutant, have raised concerns about their potentialtoxicity and the wide-ranging ecological risks they may pose. In this study, attapulgate-supported sulfidized nanoscale zero-valent iron (S-nZVI@ATP) catalyst was prepared for activation of persulfate. We investigated degradation efficiency mechanism polyethylene microplastics (PE) using S-nZVI@ATP activated persulfate advanced oxidation process. Various factors, such temperature,pH, dosage, concentration,...

According to the problem of northwest region excessive hexavalent chromium in rainwater collection, this paper studies influence factors on Nano-metal clustersmedia removing through orthogonal experiments and analyzes different filter layer thickness, initial concentration, velocity water PH, removal rate. The results show that: speed effect plays a main role, thickness weak role. When is 300mm, concentration 0.2mg / L, PH value 7, filtration 2m h, best.

The water catchment quality of northwest China is evaluated and managed through the principal component analysis. results show that characterized by high organic load turbidity, felted roof tiled achieve requirements category. evaluation conform to actual situation rainwater-collecting drinking source area objectively practically. Through this article, more objective reference for region resources planning, utilization, development environmental system optimization provided.

Building water supply and drainage is one of the important courses construction engineering technology. It a project that must be considered in modern building construction. directly related to people’s daily production life. has very distinct practicality. Its teaching content also accompanied by materials technology upgrades continuous improvement. This article discusses problems existing drainage, proposes corresponding reform measures for found, hope can achieve better effects.