scholarly journals Improvement of aggregate‐associated organic carbon and its stability in bauxite residue by substrate amendment addition

2020 ◽  
Vol 31 (16) ◽  
pp. 2405-2416
Author(s):  
Tao Tian ◽  
Zheng Liu ◽  
Feng Zhu ◽  
William Hartley ◽  
Yuzhen Ye ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Bauxite Residue ◽  
Substrate Amendment

pH and Organic Carbon Dose Rates Control Microbially Driven Bioremediation Efficacy in Alkaline Bauxite Residue

2016 ◽  
Vol 50 (20) ◽  
pp. 11164-11173 ◽  
Author(s):  
Talitha C. Santini ◽  
Laura I. Malcolm ◽  
Gene W. Tyson ◽  
Lesley A. Warren
Keyword(s):  
Organic Carbon ◽  
Bauxite Residue ◽  
Dose Rates

Effects of natural weathering processes on the distribution characteristics of organic carbon and its composition in bauxite residue aggregates

2017 ◽  
Vol 37 (4) ◽  
Author(s):  
朱锋 ZHU Feng ◽  
李萌 LI Meng ◽  
薛生国 XUE Shengguo ◽  
邹奇 ZOU Qi ◽  
吴昊 WU Hao ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Bauxite Residue ◽  
Natural Weathering ◽  
Distribution Characteristics ◽  
Weathering Processes

Effect of substrate amendment on alkaline minerals and aggregate stability in bauxite residue

2019 ◽  
Vol 26 (2) ◽  
pp. 393-403 ◽  
Author(s):  
Tao Tian ◽  
Wen-shun Ke ◽  
Feng Zhu ◽  
Qiong-li Wang ◽  
Yu-zhen Ye ◽  
...  
Keyword(s):  
Bauxite Residue ◽  
Aggregate Stability ◽  
Substrate Amendment

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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