IDENTIFICAÇÃO DE COMPOSTOS ORGÂNICOS EM LIXIVIADO DE ATERRO SANITÁRIO MUNICIPAL POR CROMATOGRAFIA GASOSA ACOPLADA A ESPECTROMETRIA DE MASSAS

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Translated abstract

<p>The organic compounds present in leachate can contaminate soil, superficial and underground water, and the majority is considered harmful to the environment and human health. The objective of this study was to identify organic compounds present in landfill leachate located in Maringá-PR by gas chromatography coupled to mass spectrometry (GC-MS). The raw leachate was characterized by measurements of pH, Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOQ), Dissolved Organic Carbon (DOC), apparent and true colors, turbidity and absorbance at 254 nm. The extraction of organic compounds in leachate was carried out by liquid-liquid extraction (LLE) with ethyl acetate and dichloromethane solvents, while varying the pH and ionic strength. The analysis of the leachate by GC-MS showed the presence of compounds considered to have toxic effects on the environment and human health, such as pesticides and phenolic compounds. Several compounds containing oxygenated groups such as carboxylic acids and alcohols were also identified, indicating that it was highly probable that the decomposition of waste in the landfill was in the acidogenic phase.</p>

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Standard Methods for the Examination of Water and Wastewater

(1995)

The best compilation of water & wastewater analysis methods available anywhere! This reorganized reference source is written for many scientific fields, including chemistry, engineering, biology, health, the environment & geo-sciences. More than 340 hods are presented, each with step-by-step procedures for precise analysis of water & wastewater chemical constituents, sanitary quality, & physical & biological characteristics. Twenty-three new methods have been added & 26 methods have been revised to reflect the very latest technical advances. You'll find a revised method for turbidity, new information on UV-absorbing organic constituents cited in the Information Collection Rule (ICR), new procedures for laboratory occupational health & safety, & much more. Incorporates the methods published in the 18th Edition Supplement. CONTENTS INCLUDE : Physical Examination, Determination of Metals & Other Inorganic Nonmetallic Constituents, Determination of Organic Constituents, Examination of Water & Wastewater Radioactivity, Toxicity Test Methods for Aquatic Organisms, Microbiological Examination of Water, Biological Examination of Water. $180.00 Nonmembers, $140.00 APHA, AWWA & WEF members.

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Preparation and certification of hijiki reference material, NMIJ CRM 7405-a, from the edible marine algae hijiki (Hizikia fusiforme).

Tomohiro Narukawa, Kazumi Inagaki, Yanbei Zhu … (2012)

A certified reference material, NMIJ CRM 7405-a, for the determination of trace elements and As(V) in algae was developed from the edible marine hijiki (Hizikia fusiforme) and certified by the National Metrology Institute of Japan (NMIJ), the National Institute of Advanced Industrial Science and Technology (AIST). Hijiki was collected from the Pacific coast in the Kanto area of Japan, and was washed, dried, powdered, and homogenized. The hijiki powder was placed in 400 bottles (ca. 20 g each). The concentrations of 18 trace elements and As(V) were determined by two to four independent analytical techniques, including (ID)ICP-(HR)MS, ICP-OES, GFAAS, and HPLC-ICP-MS using calibration solutions prepared from the elemental standard solution of Japan calibration service system (JCSS) and the NMIJ CRM As(V) solution, and whose concentrations are certified and SI traceable. The uncertainties of all the measurements and preparation procedures were evaluated. The values of 18 trace elements and As(V) in the CRM were certified with uncertainty (k = 2).