Volatile halogenated organic chemicals are found in indoor and outdoor air, often at concentrations substantially above those in remote, unpopulated areas. The outdoor ambient concentrations vary considerably among sampling stations throughout the United States, as well as diurnally and daily. The vapor pressures and air-water equilibrium (Henry's Law) constants of these chemicals influence con...

Two variants of a polarimetric method to determine ice water content are presented. One uses specific differential phase and differential reflectivity and the other uses specific differential phase; both quantities are for a 10-cm wavelength. Theoretical considerations indicate that these polarimetric methods are suited for pristine ice crystals. Ice water content of lightly to moderately aggre...

abstract soil quality is an essential concept for maximum agriculture production without environmental destruction. studying soil physical quality indicators, that express soil structural stability and soil air-water balance in root zone, is one of the most important aspects of soil quality. so determination of optimal range for pore volume distribution is important and this research carried ou...

Curators of large aquaria where there is no significant primary production and water changes are impractical have been using biological denitrification to control high nitrate concentrations. The two denitrification systems described in this study operate in different ways: the Living Seas uses a batch system, while the New Jersey State Aquarium uses a flow-through system. The rate of denitrifi...

INTRODUCTION During 1970, the amount of ground water pumped in the southern and southeastern sections The economic development of any area is tied of Florida (which includes Broward, Dade and to its natural resource base. Water, one of the most Palm Beach counties) for municipal water use was important of these natural resources, is used for a 121 billion gallons. multitude of purposes includin...

a new method was introduced for frothing characterization of flotation frothers. method uses water recovery to develop a new frothability index named water recovery index (wri). new index was determined for some commercial frothers and results were compared with dynamic frothability index (dfi). results showed that water recovery index values follow the order of a-65 13016 s/mol > df-250 6292.4...

concern over the depletion of natural resources in general, and water scarcity in particular, has stimulated the development and implementation of some policies aimed at changing farmers' behavior in terms of conserving water. in this regard, government has recently begun to invest on researches supporting the technical solutions on conserving water in the agricultural sector as the bigges...

Water hyacinth (Pontederia crassipes) is a floating hydrophyte plant considered one of the 100 most harmful invasive alien species in world. Its main uses have been developed along three lines: (1) control, (2) eradication, and (3) wastewater bioremediation. The objective this work was to conduct systematic literature review (SLR) focused on documented Pontederia crassipes, determine if there e...