A process, which does not require the addition of large amounts of chemicals, for the removal of arsenic (V) utilizing amphiphilic aggregates (i.e. cetylpyridinium chloride (CPC) micelles) and ultrafiltration (UF) membranes has been studied. The suitability of UF process was evaluated with semi-equilibrium dialysis (SED) cell since the UF process incorporated with amphiphilic aggregates is an e...

Sugarcane is cultivated on some 170000 ha of land in south central and southwestern Louisiana. This acreage drains into bayous and rivers that empty into Louisiana's coastal bays and estuaries. For a number of years the state's Department of Agriculture and Forestry and Department of Environmental Quality have collected water quality data from this sugarcane area. Study of these data shows that...

Most arsenic cancer risk assessments have been based solely on epidemiological studies to characterize the dose-response relationship for arsenic-associated cancer and to perform risk calculations. However, current epidemiological evidence is too inconsistent and fraught with uncertainty regarding arsenic exposure to provide reliable estimates. This makes it hard to draw a firm conclusion about...

Abstract Tertiary butyl alcohol in the groundwater was evaluated using closed leaking underground storage tank sites Southern California between 2016 and 2019. is not regulated lacks a maximum contaminant level California. The current of 12 µg per liter drinking water (notification level) advisory enforceable. As high as 88% during 2018–2019 fiscal year were with tertiary higher than its notifi...

An analytical model is used to simulate the effects of partial source removal and plume remediation on ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) plumes at contaminated underground storage tank (UST) sites. The risk posed by EDB, 1,2-DCA, and commingled gasoline hydrocarbons varies throughout the plume over time. Dissolution from the light nonaqueous phase liquid (LNAPL) determin...

bgs below ground surface BOD biochemical oxygen demand cDCE cis-1,2-dichloroethene CF chloroform c/t-DCE cis/trans-dichloroethene CT carbon tetrachloride CVOC chlorinated volatile organic compound Dhb Dehalobacter spp. Dhc Dehalococcoides spp. DNAPL dense non-aqueous phase liquid DO dissolved oxygen DoD Department of Defense DOC dissolved organic carbon DPT direct-push technology DWEL Drinking ...

A research project was conducted to evaluate the impact of alternative citrus nitrogen and water management practices on groundwater nitrate concentrations beneath the vulnerable sandy soils in the ridge citrus region of Central Florida. Fifteen months of baseline data indicated that groundwater nitrate-nitrogen concentrations were above the Environmental Protection Agency’s Maximum Contaminant...

In this paper, lumped-parameter models (LPMs) were developed and utilized to simulate nitrate concentration in the groundwater of Gaza City and Jabalia Camp (GCJC) in the Gaza Coastal Aquifer (GCA) in Palestine. In the GCJC area, nitrate levels exceed the maximum contaminant level (MCL) of 10 mg/L NO3-N (45 mg/L NO3) in many wells. Elevated nitrate concentrations in the groundwater of GCJC area...

background: a laboratory study was conducted to investigate the ability of a special type of strongly basic resin mp500ws for the removal of nitrate from different waters. methods: two different types of point-of-use (pou) devices containing an identical resin were used. mp500ws known as macro porous was used in pou devices for removal of high concentrations of nitrate and sulfate ions from wat...