While the thermochemical stability of gas-phase HgF4 against F2 elimination was predicted by accurate quantum chemical calculations more than a decade ago, experimental verification of "truly transition-metal" mercury(IV) chemistry is still lacking. This work uses detailed density functional calculations to explore alternative species that might provide access to condensed-phase Hg(IV) chemistr...

As the most populous country in world, China has a great shortage pressure of water resources. With acceleration urbanization, China’s usage different sectors will change significantly next few years. In order to investigate main reasons behind China, Logarithmic Mean Divisia Index (LMDI) model was adopted this paper from 2000 2020 with provincial data. Three effects, including that technology,...

A cluster model for active site of nanotube (C48) was presented and investigated the geometricstructure and thermochemical parameters. Quantum-mechanical calculations were performed at theHF / 510-30, 6-310, 6-3 IG• and 6-310" levels of theory in the gas phase and three solvents atfour temperatures. Also, nuclear shielding parameters of the active site of nanotube have been takeninto account us...

The bacterial community composition in water and sediment samples during the decomposition of Microcystis biomass were analyzed using the 454 pyrosequencing technique. We found dramatic shifts in the bacterial community composition of water and sediments after the addition of Microcystis biomass. Among all the detected phyla, only Firmicutes was found to be dominant in both water and sediment s...

As one of the most environmentally friendly and cost-effective method, anaerobic digestion (AD) has been widely studied and developed as a conventional technology to degrade biodegradable materials and produce biogas simultaneously. Various substrate sources are used in this process such as organic fraction of municipal solid waste (MSW), waste activated sludge (WAS), animal manures, agro-indus...

The precipitation of struvite from wastewater is a potential alternative for the recovery nutrients, especially phosphorus, which an essential macronutrient agriculture but can be harmful to environment when improperly disposed in water bodies. In addition, has elements great added value agricultural activity (P, N, and Mg) is, therefore, considered sustainable fertilizer. its formation process...

Greenhouse gases are the major cause of global warming and it leads to climate changes. It poses a threat development community human civilization. Agriculture, fossil fuel consumption by industries automobiles source greenhouse gases. Effective control or reduction is challenge. The conventional methods that used for decomposition absorption, photocatalysis, electrochemical thermochemical meth...

abstract incorporation of plant residues in soils is an important agricultural practice for maintaining soil fertility under organic management systems. plant residues quality, soil physical and chemical properties, and the microbial population diversity of soils are the most important factors influencing the decomposition of added organic matter to soils. decomposition rate of municipal wastes...