scholarly journals Isotopic characteristics and sources of organic carbon in suspended particulates and sediments in Lake Wuliangsuhai

2021 ◽  
Vol 33 (6) ◽  
pp. 1753-1765
Author(s):  
Geng Yue ◽  
◽  
Lv Xixi ◽  
Yu Ruihong ◽  
Sun Heyang ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Suspended Particulates

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).

Deployable Decentralized Biofilm System to Degrade Organic Carbon, Nutrients and Benzene from Wastewater

2009 ◽  
Author(s):  
Dong Chen ◽  
Che-Jen Lin ◽  
R. Gavin Jones ◽  
Sehul Patel ◽  
Rachelle Smith ◽  
...  
Keyword(s):  
Organic Carbon

Photocatalytic degradation of methylene blue from aqueous solutions using nanopillars-TiO2 thin films: Batch reactor studies

2018 ◽  
Vol 18 (3) ◽  
pp. 81-91 ◽  
Author(s):  
C. Lalhriatpuia
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Organic Carbon ◽  
Photocatalytic Degradation ◽  
Batch Reactor ◽  
Tio2 Thin Films ◽  
Initial Concentration ◽  
Bet Specific Surface Area ◽  
Interfering Ions

Nanopillars-TiO2 thin films was obtained on a borosilicate glass substrate with (S1) and without (S2) polyethylene glycol as template. The photocatalytic behaviour of S1 and S2 thin films was assessed inthe degradation of methylene blue (MB) dye from aqueous solution under batch reactor operations. The thin films were characterized by the SEM, XRD, FTIR and AFM analytical methods. BET specific surface area and pore sizes were also obtained. The XRD data confirmed that the TiO2 particles are in its anatase mineral phase. The SEM and AFM images indicated the catalyst is composed with nanosized pillars of TiO2, evenly distributed on the surface of the substrate. The BET specific surface area and pore sizes of S1 and S2 catalyst were found to be 5.217 and 1.420 m2/g and 7.77 and 4.16 nm respectively. The photocatalytic degradation of MB was well studied at wide range of physico-chemical parameters. The effect of solution pH (pH 4.0 to 10.0) and MB initial concentration (1.0 to 10.0 mg/L) was extensively studied and the effect of several interfering ions, i.e., cadmium nitrate, copper sulfate, zinc chloride, sodium chloride, sodium nitrate, sodium nitrite, glycine, oxalic acid and EDTA in the photocatalytic degradation of MB was demonstrated. The maximum percent removal of MB was observed at pH 8.0 beyond which it started decreasing and a low initial concentration of the pollutant highly favoured the photocatalytic degradation using thin films and the presence of several interfering ions diminished the photocatalytic activity of thin films to some extent. The overall photocatalytic activity was in the order: S2 > S1 > UV. The photocatalytic degradation of MB was followed the pseudo-first-order rate kinetics. The mineralization of MB was studied with total organic carbon measurement using the TOC (total organic carbon) analysis.

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