Delivery of sulfate to petroleum hydrocarbons (PHCs) source zones and groundwater plumes is desirable enhance biodegradation rates when treatment has become limited due depletion sulfate. Sulfate land application involves spreading salts on ground surface allowing their dissolution infiltration into subsurface. The objectives this pilot-scale investigation were capture the vertical transport be...

The soil-plant system can act as a prevailing zone of pesticide dissipation in agroecosystems, which may influence leaching following rainfall events. Here we examined the contribution leaching, and degradation widely used anilide pesticides planted unplanted mesocosms with contrasting vineyard forest soils. were spiked at 25 mg/kg acetochlor, alachlor, S-metolachlor, butachlor metalaxyl, follo...

Eukaryotic microalgae play critical roles in the structure and function of marine food webs. The contribution to webs can be tracked using compound-specific isotope analysis amino acids (CSIA-AA). Previous CSIA-AA studies have defined eukaryotic as a single functional group web mixing models, despite their vast taxonomic ecological diversity. Using controlled cultures, this work characterizes a...

Chlorinated ethenes (CEs) are most problematic pollutants in groundwater. Dehalogenating bacteria, and particular organohalide-respiring bacteria (OHRB), can transform PCE to ethene under anaerobic conditions, thus contribute bioremediation of contaminated sites. Current approaches characterize situ biodegradation CEs include hydrochemical analyses, quantification the abundance key species (e.g...

Preparative high pressure liquid chromatography on US-Y zeolite shape-selective molecular sieve was studied for carbon isotopic fractionation e€ects. We tested a standard mixture [17b, 21b(H)-hopane, 5a-cholestane] and complex natural hydrocarbon mixtures dominated by tetraand pentacyclic triterpenoids extracted from Oxford Clay shales. We con®rmed that steroids and hopanoids were separated on ...

The on-going decline in Arctic sea ice represents a significant loss of habitat for algae, which are major contributor to primary production the Arctic. Data on algal is limited due difficulties both accessing sea-ice and sampling under-ice algae. Compound-specific isotope analysis (CSIA) amino acids (AAs) emerging as powerful tool trace element origins biogeochemical processes marine food webs...

Compound specific isotopic analysis (CSIA) of amino acids has received increasing attention in ecological studies in recent years due to its ability to evaluate trophic positions and elucidate baseline nutrient sources. However, the incorporation rates of individual amino acids into protein and specific trophic discrimination factors (TDFs) are largely unknown, limiting the application of CSIA ...

Since the 1990s, private sector participation through Public-Private Partnerships, PPPs model has started in airport construction, modernization, and operation India. Major international airports like IGIA, Indira Gandhi at Delhi, CSIA Chhatrapati Shivaji Mumbai, Cochin Kochi, etc., are successful examples of implementation. This research focuses on Indian approach privatization, with a specifi...