An Electrochemical Study of the Effect of Sulfate on the Surface Oxidation of Pyrite.

Pyrite is one of the most abundant metal sulfide tailings and is susceptible to oxidation, yielding acidic mine drainage (AMD) that poses significant environmental risks. Consequently, the exploration of pyrite surface oxidation and the kinetic influencing factors remains a pivotal research area. Despite the oxidation of pyrite producing a significant amount of sulfate (SO), a comprehensive investigation into its influence on the oxidation process is lacking.

Immobilization of Biomass Materials for Removal of Refractory Organic Pollutants from Wastewater.

In the field of environmental science and engineering, microorganisms, enzymes and algae are promising biomass materials that can effectively degrade pollutants. However, problems such as poor environmental adaptability, recycling difficulties, and secondary pollution exist in the practical application of non-immobilized biomass materials. Biomass immobilization is a novel environmental remediation technology that can effectively solve these problems.

Enhancing mechanism of arsenic(iii) adsorption by MnO-loaded calcined MgFe layered double hydroxide.

The use of MnO/MgFe-layered double hydroxide (MnO/MgFe-LDH) and MnO/MgFe-layered double oxide (MnO/MgFe-LDO) for arsenic immobilization from the aqueous medium is the subject of this research. Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy were used to characterise MnO/MgFe-LDH and MnO/MgFe-LDO. Based on our developed method, MnO was spread on the clay composites' surfaces in the form of a chemical bond.

Reduction of acid mine drainage by passivation of pyrite surfaces: A review.

Acid mine drainage (AMD), a source of considerable environmental pollution worldwide, has prompted the development of many strategies to alleviate its effects. Unfortunately, the methods available for remedial treatment of AMD and the damage it cause are generally costly, labor-intensive, and time-consuming. Furthermore, such treatments may result in secondary pollution.

Effect of fulvic acid co-precipitation on biosynthesis of Fe(III) hydroxysulfate and its adsorption of lead.

Iron (III) co-precipitation with dissolved organic matter (DOM) is pervasive in many natural environments. However, the effects of DOM on the formation of Fe(III) hydroxysulfate (FHS) and its environmental implications are poorly understood. In this study, fulvic acid (FA) was used as a model DOM compound, and experiments were devised to investigate the effects of FA on the formation of FHS.

A Review on Recent Treatment Technology for Herbicide Atrazine in Contaminated Environment.

Atrazine is a kind of triazine herbicide that is widely used for weed control due to its good weeding effect and low price. The study of atrazine removal from the environment is of great significance due to the stable structure, difficult degradation, long residence time in environment, and toxicity on the organism and human beings. Therefore, a number of processing technologies are developed and widely employed for atrazine degradation, such as adsorption, photochemical catalysis, biodegradation, etc.

Spoof Surface Plasmon Polaritons Power Divider with large Isolation.

Periodic corrugated metal structure is designed to support and propagate spoof surface plasmon polaritons (SSPPs) wave in the microwave frequencies. In this paper, firstly a plasmonic waveguide consisting of oval-ring shaped cells is proposed with the performance of high transmission efficiency in a wide frequency range. The coplanar waveguides (CPWs) with 50 Ω impedance are adopted to feed the energies or extract signals at both ends of the plasmonic waveguide.

Removal of heavy metals from acid mine drainage using chicken eggshells in column mode.

Chicken eggshells (ES) as alkaline sorbent were immobilized in a fixed bed to remove typical heavy metals from acid mine drainage (AMD). The obtained breakthrough curves showed that the breakthrough time increased with increasing bed height, but decreased with increasing flow rate and increasing particle size. The Thomas model and bed depth service time model could accurately predict the bed dynamic behavior.

[Clinical study on effects of kangwei granule on precancerous lesion in patients with chronic atrophic gastritis].

Unlabelled: (GPL) in patients suffered from chronic atrophic gastritis (CAG) differentiated as Pi-deficiency with damp-heat retention and blood stasis in TCM Syndrome differentiation.

Methods: Sixty-eight patients fitting to the admission criteria were randomly divided into two groups, 36 patients were treated with KWG in the treated group and 32 were treated with Weifuchun in the control group, all were treated for 2 treatment courses (12 weeks as one course).

Results: The curative effects on gastroscopy and pathologic changes in the treated group were significantly superior to those in the control group (P < 0.