SITE Demonstration of Minergy Glass Furnace Treatment of PCBs, PCDDs/Fs, and Metals in River Sediment

A part of a soldier block, placed in a float glass furnace near the hot spot area, was investigated to learn about the changes in the microstructure during the production of the block, during the use for glass melting and after the shut down of the furnace and the cooling of the block. Beside the three phases after the production (baddeleyite, corundum, vitreous phase) during use as a soldier block mullite and secondary corundum as well as secondary zirconia may occure. Cooling down the used block after the furnace campaign the beginning of the crystallisation of feldspars may be seen.

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Accelerated bioremediation of a complexly contaminated river sediment through ZVI-electrode combined stimulation

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2021.125392 ◽

2021 ◽

Vol 413 ◽

pp. 125392

Author(s):

Ke Shi ◽

Bin Liang ◽

Qiu Guo ◽

Youkang Zhao ◽

Hafiz Muhammad Adeel Sharif ◽

...

Keyword(s):

River Sediment

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Broad diversity of bacteria degrading 17ß-estradiol-3-sulfate isolated from river sediment and biofilm at a wastewater treatment plant discharge

Archives of Microbiology ◽

10.1007/s00203-021-02409-0 ◽

2021 ◽

Author(s):

Tamara Mainetti ◽

Marilena Palmisano ◽

Fabio Rezzonico ◽

Blaž Stres ◽

Susanne Kern ◽

...

Keyword(s):

Wastewater Treatment ◽

River Sediment ◽

Wastewater Treatment Plants ◽

Treatment Plant ◽

Aquatic Environments ◽

Bacterial Isolates ◽

Degrading Bacteria ◽

17Β Estradiol ◽

Aquatic Wildlife ◽

Harmful Effects

AbstractConjugated estrogens, such as 17β-estradiol-3-sulfate (E2-3S), can be released into aquatic environments through wastewater treatment plants (WWTP). There, they are microbiologically degraded into free estrogens, which can have harmful effects on aquatic wildlife. Here, the degradation of E2-3S in environmental samples taken upstream, downstream and at the effluent of a WWTP was assessed. Sediment and biofilm samples were enriched for E2-3S-degrading microorganisms, yielding a broad diversity of bacterial isolates, including known and novel degraders of estrogens. Since E2-3S-degrading bacteria were also isolated in the sample upstream of the WWTP, the WWTP does not influence the ability of the microbial community to degrade E2-3S.

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IMPROVED GLASS HOMOGENEITY AND HIGHER SUSTAINABILITY THROUGH TEXTURED EXPENDABLES TUBES IN CONTAINER GLASS FURNACE

Ceramic Transactions Series - 81St Conference on Glass Problems ◽

10.1002/9781119823056.ch5 ◽

2021 ◽

pp. 67-72

Author(s):

Patrice Fournier ◽

Michel Gaubil ◽

Stephane Schaller

Keyword(s):

Glass Furnace ◽

Container Glass

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Little Akaki River sediment enrichment with heavy metals, pollution load and potential ecological risks in downstream, Central Ethiopia

ENVIRONMENTAL SYSTEMS RESEARCH ◽

10.1186/s40068-020-00188-z ◽

2020 ◽

Vol 9 (1) ◽

Author(s):

Deshu Mamo Mekuria ◽

Alemnew Berhanu Kassegne ◽

Seyoum Leta Asfaw

Keyword(s):

Heavy Metals ◽

River Sediment ◽

Addis Ababa ◽

Biological Effects ◽

Sediment Quality ◽

Contamination Factor ◽

Anthropogenic Sources ◽

Ecological Risks ◽

Pollution Load ◽

Akaki River

Abstract Addis Ababa City’s river ecosystem is under extreme pressure as a result of inappropriate practices of dumping domestic and industrial wastes; thus, threatening its ability to maintain basic ecological, social and economic functions. Little Akaki River which drains through Addis Ababa City receives inorganic and organic pollutants from various anthropogenic sources. Most of inorganic pollutants such as toxic heavy metals released into the river are eventually adsorbed and settle in the sediment. The objective of this study was to evaluate the enrichment levels, pollution load and ecological risks of selected heavy metals (Zn, Cr, Cd and Pb) using various indices. The mean concentrations of heavy metals in Little Akaki River sediment were: Zn (78.96 ± 0.021–235.2 ± 0.001 mg/kg); Cr (2.19 ± 0.014–440.8 ± 0.003 mg/kg); Cd (2.09 ± 0.001–4.16 ± 0.0001 mg/kg) and Pb (30.92 ± 0.018–596.4 ± 0.066 mg/kg). Enrichment factor values indicated that sediments were moderate to significantly enriched with Zn and Cr; moderate to very highly enriched with Pb, and very highly enriched in all sampled sites with Cd. Geo-accumulation index and contamination factor values indicated that the sediments were moderate to very highly contaminated with toxic Cd and Pb. The decreasing order of pollution load index (PLI) in downstream was: (S9) > (S4) > (S8) > (S3) > (S6) > (S10) > (S5) > (S2) > (S7) > (S1). PLI and hierarchical cluster analysis revealed that the highest pollution load occurred in the lower course of the river (S9) which may be due to metals inputs from anthropogenic sources. The ecological risk (RI = 350.62) suggested that the contaminated Little Akaki River sediment can pose considerable ecological risks of pollution. The concentrations of Zn, Cr, Cd and Pb in Little Akaki River sediment surpassed eco-toxicological guideline limits of USEPA (threshold effect concentration) and CCME (Interim Sediment Quality Guidelines). Thus, the contaminated sediments can pose adverse biological effects on sediment dwelling organisms.

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