Associations Between the Molecular and Optical Properties of Dissolved Organic Matter in the Florida Everglades, a Model Coastal Wetland System

Optical properties are easy-to-measure proxies for dissolved organic matter (DOM) composition, source, and reactivity. However, the molecular signature of DOM associated with such optical parameters remains poorly defined. The Florida coastal Everglades is a subtropical wetland with diverse vegetation (e.g., sawgrass prairies, mangrove forests, seagrass meadows) and DOM sources (e.g., terrestrial, microbial, and marine). As such, the Everglades is an excellent model system from which to draw samples of diverse origin and composition to allow classically-defined optical properties to be linked to molecular properties of the DOM pool. We characterized a suite of seasonally- and spatially-collected DOM samples using optical measurements (EEM-PARAFAC, SUVA254, S275−295, S350−400, SR, FI, freshness index, and HIX) and ultrahigh resolution mass spectrometry (FTICR-MS). Spearman\u27s rank correlations between FTICR-MS signal intensities of individual molecular formulae and optical properties determined which molecular formulae were associated with each PARAFAC component and optical index. The molecular families that tracked with the optical indices were generally in agreement with conventional biogeochemical interpretations. Therefore, although they represent only a small portion of the bulk DOM pool, absorbance, and fluorescence measurements appear to be appropriate proxies for the aquatic cycling of both optically-active and associated optically-inactive DOM in coastal wetlands

2015 - The Twentieth Annual Symposium of Student Scholars

The full program book from the Twentieth Annual Symposium of Student Scholars, held on April 16, 2015. Includes abstracts from the presentations and posters.https://digitalcommons.kennesaw.edu/sssprograms/1014/thumbnail.jp

2011 Presentation Abstracts

https://scholarworks.gvsu.edu/acf_abstracts/1003/thumbnail.jp

Research on Chesapeake Bay and contiguous waters of the Chesapeake Bight of the Virginian Sea at the Virginia Institute of Marine Science, Gloucester Point, Virginia and Wachapreague, Virginia 1973-74 edition.

RANN (IRRPOS) project report ; no. 4

The Development of a Health, Safety and Environment Management System for an Integrated Gender Separated Campus in the Middle East Region – A Case Study

In recent years, concerns regarding health, safety, and environmental issues increased. This led to the development of integrated Health, Safety and Environment (HSE) Management Systems in many organizations, including universities. The study of the current HSE management system of the United Arab Emirates University (UAEU) has been conducted as a typical National university in the Middle East Region with the added unique feature of a large integrated campus with gender separation. Emphasis has been given to the E-shared laboratories of the UAEU as the interface between the two sides (male/female) of the campus. The E-shared laboratories incorporate most of the teaching laboratories of the Colleges Food and Agriculture, Engineering and Science, and it is here that most of the chemicals and biological samples of the university can be found. At the same time, the E-shared laboratories present a physical bottleneck in the movement between campuses, also in emergency situations. Spatial Analysis has been conducted to model crowd behavior in the E4-shared laboratories building in emergency situations. In addition, about environmental concerns within the health and safety infrastructure, the waste treatment with silica gel and recycling of silica gel in educational and small research laboratories has been studied

Focus, 2016, Summer

https://digitalcommons.andrews.edu/focus/1072/thumbnail.jp

Special Libraries, December 1966

Volume 57, Issue 10https://scholarworks.sjsu.edu/sla_sl_1966/1009/thumbnail.jp

Carbon Dioxide Removal by Using Ionic Liquid

Regarding of many issues faced by the industrial process to remove C02. The writer decides to come out with the latest innovation and technology that can overcome the problem. The current technology is using chemical and physical solvent. The major drawback ofthe traditional gas absorption separation is mainly causes by foaming issues, corrosion issues, effect of impurities and concentration ofthe solvent. Several issues and challenges that in using current C02 removal method is the intensive energy requirements, the corrosivity of the solvents, low C02 loading capacity, hazardous to human health and environment, the degradation of amine, and high cost to maintain the solvent. Therefore, new methodology or approach is needed to overcome this problem. The objective of this research was to identify potential Ionic Liquid for C02 adsorption and to investigate C02 adsorption process by selected Ionic Liquid. There are 3 types of ionic liquid that proved can absorb 0O2 which is l-K-butyl-3-mefhylimidazolium tetrafluoroborate, [bmim]+[BF4]M-«-butyl-3-methylimidazohum dicyanamide and [bmim]+pCA]'l-butyl-3-methylimidazolium acetate, [bmimf[acetatef. The criteria considered to chose the ionic liquid is easy to synthesis, have a very low vapour pressure, minimal degradation of ionic liquid, chemically stable, environmentally friendly, have distinct selectivities and having carboxylate moiety bond. However the best among those 3ionic liquids was chosen due to certain circumstances. In this research it involves several major activities, the preparation of ionic liquid, characterization of ionic liquid, an absorption study on the ionic liquid and result analysis on the ionic liquid. The study also involves a comparison with monodiethanolamine,MEA which is the common chemical solvent that is being used in the process plant The result from each solvent has been compared in the result analysis. The chosen ionic liquid has proven can absorb C02 and can be further research for implementation in the process industry

Fiscal Year 1990 Program Report

The activities on which this report is based were financed in part by the Department of the Interior, U. S. Geological Survey, through the Ohio Water Resources Center.Report No. G-1607-02Title from facsimile cover pageWater is one of Ohio's most important natural resources, and the State has an adequate supply to meet its immediate needs. Most of Ohio's water problems are associated with water quality. Of primary concern are the sediments, nutrients and acids in the surface waters from urban, agricultural and mining areas, and the toxic and hazardous wastes that threaten the ground and surface waters. The focus of the 1990 State Water Research Program was directed at some of these needs. One project explored the design criteria for an innovative two-stage fluidized bed bioreator in which the three major processes of cell immobilization, biodegradation, and biofilm control were combined in a single unit This innovative, reliable biological wastewater treatment process and design provides an efficient and environmentally safe waste water treatment system. Two projects explored the fate and transport of agricultural chemicals. One studied the potential impacts that interactions and reactions between herbicides and existing humic materials as they move through the soils toward the groundwater table. The other project studied the behavior of Nitrogen-heterocyclic compounds as they breakdown in the soil and their persistence in an aquifer. The other project studied the Scioto River buried valley aquifer. This research developed, a ground-water management model for predicting water-quality changes associated with ground-water abstraction. Training was provided to four students enrolled in three disciplines and two colleges at The Ohio State University.Abstract -- Water Problems and Issues of Ohio -- Program Goals and Priorities -- Research Project Synopses -- Information Transfer Activities -- Cooperative Arrangements -- Training Accomplishment

Dissolved black carbon in aquatic ecosystems

The incomplete combustion of organic molecules produces a chemically diverse suite of pyrogenic residues termed black carbon (BC). The significance of BC cycling on land has long been recognized, and the recognition of dissolved BC (DBC) as a major component of the aquatic carbon cycle is developing rapidly. As we seek a greater understanding of DBC cycling, our interpretation of environmental DBC concentrations and molecular composition should take into account both the formation conditions of charred residues, and the physico‐chemical transformation of DBC that occurs during transit within aquatic systems. We present the current state of knowledge concerning sources, processing, and sinks of DBC in inland, coastal/estuarine, and ocean waters. We feature studies and new methodologies which focus specifically on the aquatic cycling of DBC, explore the relationship between particulate and dissolved BC, and highlight research gaps which should be targeted to advance our current knowledge of DBC biogeochemistry