The Zero Valent Iron (ZVI) is the material most commonly used for permeable reactive barriers (PRB). For technical and economic reasons, hoter reactive substances usable in alternative to ZVI are investigated. The present study takes into account a vegetable fibers, the cabuya, investigating its capacity to retain heavy metals. The capacity of the cabuya fibers to adsorb heavy metals was verifi...

Zero velocity update (ZUPT) plays an important role in pedestrian navigation algorithms with the premise that the zero velocity interval (ZVI) should be detected accurately and effectively. A novel adaptive ZVI detection algorithm based on a smoothed pseudo Wigner-Ville distribution to remove multiple frequencies intelligently (SPWVD-RMFI) is proposed in this paper. The novel algorithm adopts t...

Red mud (RM) was produced during alumina production from bauxite known as the Bayer process. Arsenic was detected in the solid phase of RM (RMsf) which was disposed in the disposal area. This study investigates the effectiveness of using Zero-valent iron (ZVI), ferrihydrite, ferrous sulfate (FeSO4), waste acid (WA) or CO2 for immobilization of arsenic in the RMsf. To test the effect of the amen...

Large amounts of NH3 and H2S are emitted during sewage sludge composting, resulting in odor pollution. This composting experiment was carried out using mixed with sawdust, different zero-valent iron (ZVI) were added to investigate the effect on volatile gases, such as H2S, analyze available sulfur, total moisture content, germination index compost. The results showed that addition ZVI process h...

Nanoscale zerovalent iron (NZVI) such as Toda Kogyo RNIP-10DS has been used for site remediation, yet information is lacking regarding how far injected NZVI can travel, how long it lasts, and how it transforms to other minerals in a groundwater system. Previously we reported effective mass destruction of chlorinated ethenes dominated by tetrachloroethene (PCE) using emulsified zerovalent iron (...

Direct injection of reactive nanoscale zerovalent iron particles (NZVI) is considered to be a promising approach for remediation of aquifers contaminated by chlorinated organic pollutants. In this study we show that the extent of sulfidation of NZVI enhances the rate of dechlorination of trichloroethylene (TCE) compared to that by unamended NZVI, and the enhancement depends on the Fe/S molar ra...

Pretreatment with the addition of metals to anaerobic digestion in biogas production is crucial address improper degradation organic compounds low methane production. Biogas from a combination cassava pulp and wastewater batch system under variation alkaline heat conditions as pretreatment was investigated zero-valent iron (ZVI) after pretreatment. It found that at pH 10 100 °C for 30 min combi...

Carbon emission is one of the main causes global climate change, thus it necessary to choose a low-carbon method in contaminated soil remediation. This paper studies adsorption ability ZVI on Pb(II) soils under different working conditions. The removal efficiency was 98% because suitable dosage, log reaction time and low initial solution concentration. whole balancing process much fast accordin...