scholarly journals Influence of the pH indicator on dissolved organic carbon for determination the hazardousness of industrial waste

2019 ◽  
pp. 200-206
Author(s):  
Georgiana Cernica ◽  
Georgeta Madalina Arama ◽  
Adriana Cuciureanu ◽  
Gina Catrina ◽  
Diana Stroia
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Industrial Waste ◽  
Common Method ◽  
Leaching Test ◽  
Environmental Legislation ◽  
Ph Indicator ◽  
Essential Information ◽  
Waste Storage ◽  
Influence Of Ph

The paper presents the influence of pH on the dissolved organic carbon in industrial waste samples as a decision indicator in determining the hazardousness of the waste at storage according to the environmental legislation. Waste storage is a common method of management and is realizing according to GO 95/2005, which requires limit concentrations of the indicators analyzed according to each type of deposit (inert, non-hazardous, and hazardous). For the analysis of the dissolved organic carbon, 6 samples of waste from different sectors of activity were subjected to the leaching test and the eluate was analyzed on a multi N/C 3100 equipment at both the pH of the waste, itself and between 7.5 and 8 pH units. From the results obtained it is found that the modification of the pH leads to significant variations in the concentration of the dissolved organic carbon, variations which can provide essential information for the subsequent management of the waste.

scholarly journals SOLVING TECHNICAL PROBLEMS THROUGH EQUATIONS

2018 ◽  
Vol 24 (1) ◽  
pp. 44-49
Author(s):  
DANILA VIERU ◽  
GHEORGHE VOICU ◽  
LAURA TOMA ◽  
PAULA TUDOR
Keyword(s):  
Environmental Factors ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Household Waste ◽  
Mathematical Equation ◽  
Technical Problems ◽  
Waste Gas ◽  
Suspended Particulates ◽  
Waste Storage ◽  
Environmental Permitting

The need for solid household waste (MSW) generated by economic and domestic activities is continuous and should be imposed to protect the health of the population and environmental factors. After sorting the generated waste, „the remaining residue” favours the occurrence of some pollutants, among which we mention suspended particulates, disagreeable odours, greenhouse gases, etc. This waste has to be managed in safe health and environment, no matter where it was generated. Managing them means either storing in statutory environmental protection facilities or incinerating in authorized installations with integrated environmental permitting. Waste storage may be subject to a mathematical equation called the time equation of a landfill. On the basis of such equation, it will be possible to calculate annually the amount of degraded waste gas generating gas (LFG) containing CH4 and CO2. The amount of degraded waste means waste with high dissolved organic carbon (DOC).

scholarly journals SOLVING TECHNICAL PROBLEMS THROUGH EQUATIONS

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
DANILA VIERU ◽  
GHEORGHE VOICU ◽  
LAURA TOMA ◽  
PAULA TUDOR
Keyword(s):  
Environmental Factors ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Household Waste ◽  
Mathematical Equation ◽  
Technical Problems ◽  
Waste Gas ◽  
Suspended Particulates ◽  
Waste Storage ◽  
Environmental Permitting

The need for solid household waste (MSW) generated by economic and domestic activities is continuous and should be imposed to protect the health of the population and environmental factors. After sorting the generated waste, „the remaining residue” favours the occurrence of some pollutants, among which we mention suspended particulates, disagreeable odours, greenhouse gases, etc. This waste has to be managed in safe health and environment, no matter where it was generated. Managing them means either storing in statutory environmental protection facilities or incinerating in authorized installations with integrated environmental permitting. Waste storage may be subject to a mathematical equation called the time equation of a landfill. On the basis of such equation, it will be possible to calculate annually the amount of degraded waste gas generating gas (LFG) containing CH<sub>4</sub> and CO<sub>2</sub>. The amount of degraded waste means waste with high dissolved organic carbon (DOC).

1-Octanol/water distribution coefficient of oxolinic acid: influence of pH and its relation to the interaction with dissolved organic carbon

Chemosphere ◽  
2000 ◽  
Vol 40 (7) ◽  
pp. 711-714 ◽  
Author(s):  
Hans-Christian Holten Lützhøft ◽  
Wouter H.J Vaes ◽  
Andreas P Freidig ◽  
Bent Halling-Sørensen ◽  
Joop L.M Hermens
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Distribution Coefficient ◽  
Water Distribution ◽  
Oxolinic Acid ◽  
Influence Of Ph

Influence of pH, Aluminum, and Organic Matter on Stream Invertebrates

1986 ◽  
Vol 43 (6) ◽  
pp. 1285-1289 ◽  
Author(s):  
Thomas M. Burton ◽  
Jon W. Allan
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Stream Water ◽  
Organic Ligand ◽  
Low Ph ◽  
Interactive Effects ◽  
Stream Invertebrates ◽  
Natural Stream ◽  
Influence Of Ph

The interactive effects of low pH, aluminum, and organic matter on five species of invertebrates collected from low-alkalinity (160–300 μeq/L) Michigan streams were measured using five 28-d experiments during 1982 and 1983. Such interactive effects had not been tested previously for these species. Each experiment consisted of a control channel (pH 7.0), a pH modified (4.0 or 5.0), and pH plus Al (250 or 500 μg Al/L) modified channel. Three experiments were conducted using natural stream water (dissolved organic carbon of 42–47 mg C/L), while two were conducted using simulated stream water with no dissolved organic carbon added. The invertebrates included Asellus intermedius Forbes, Pycnopsyche guttifer (Walker), Lepidostoma liba (Ross), Nemoura sp., and Physella heterostropha (Say). Survival of all species was significantly decreased at pH 4 compared with controls but not at pH 5 except for Asellus (15–20% mortality). Adding 500 μg Al/L caused significant additional mortality under some conditions for all species except Physella. Removal of organic matter from the water caused complete mortality at pH 4 for Nemoura and Asellus when 500 μg Al/L was added and decreased survival for Pycnopsyche to less than 20%. Addition of citrate as an organic ligand reduced susceptibility to Al in the low-organic streamwater treatment.

CHARACTERISATION OF DISSOLVED ORGANIC CARBON (DOC) LEACHED FROM LEAVES IN WATER

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Markus Heryanto Langsa
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Total Organic Carbon ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Mass Spectrometry ◽  
Pinus Radiate

<p>Penelitian ini bertujuan untuk menentukan senyawa organik khususnya organic karbon terlarut (DOC) dari dua spesies daun tumbuhan (<em>wandoo eucalyptus </em>and <em>pinus radiate, conifer</em>) yang larut dalam air selama periode 5 bulan leaching eksperimen. Kecepatan melarutnya senyawa organic ditentukan secara kuantitatif dan kualitatif menggunakan kombinasi dari beberapa teknik diantaranya Total Organic Carbon (TOC) analyser, Ultraviolet-Visible (UV-VIS) spektrokopi dan pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS).</p><p>Hasil analisis DOC dan UV menunjukkan peningkatan yang tajam dari kelarutan senyawa organic di awal periode pengamatan yang selanjutnya berkurang seiring dengan waktu secara eksponensial. Jumlah relatif senyawa organic yang terlarut tergantung pada luas permukaan, aktifitas mikrobiologi dan jenis sampel tumbuhan (segar atau kering) yang digunakan. Fluktuasi profil DOC dan UV<sub>254</sub> disebabkan oleh aktifitas mikrobiologi. Diperoleh bahwa daun kering lebih mudah terdegradasi menghasilkan senyawa organic dalam air dibandingkan dengan daun segar. Hasil pyrolysis secara umum menunjukkan bahwa senyawa hidrokarbon aromatic dan fenol (dan turunannya) lebih banyak ditemukan pada residue sampel setelah proses leaching kemungkinan karena adanya senyawa lignin atau aktifitas humifikasi mikrobiologi membuktikan bahwa senyawa-senyawa tersebut merupakan komponen penting dalam proses karakterisasi DOC.</p>

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