Preparation and Characterisation of Pani Nanofibres Using Ferric Chloride As Oxidant in Presence of Hcl

The use of cheap, locally available peat as a treatment method for landfill leachate was investigated by passing leachate through plexiglass columns filled with an amorphous-granular peat. Preliminary adjustment of pH showed that reducing pH to 4.8 dramatically reduced adsorption. Increasing the pH to 8.4, metal removal was increased owing to filtration of precipitated metals. The best adsorption of metals occurred at the 'natural' pH of 7.1. Manganese was found to be the limiting pollutant. At the 0.05 mg/ℓ maximum acceptable manganese concentration 94% of the total metals were removed, requiring 159 kg of peat per 1000 ℓ of leachate.Resting the peat for 1 month did significantly increase removal capacity.Desorption of some contaminants occurred when water was percolated through the peat. The desorption test effluent was not toxic to fish although iron, lead and COD (chemical oxygen demand) exceeded acceptable values.Chemical pretreatment using lime and ferric chloride achieved significant iron, manganese and calcium removals. Chemical pretreatment followed by peat adsorption offered no advantage other than reducing toxicity to fish.Peat treatment alone was effective in reducing concentrations to a level that was non-toxic to fish.

Download Full-text

Insight into the roles of ferric chloride on short-chain fatty acids production in anaerobic fermentation of waste activated sludge: Performance and mechanism

Chemical Engineering Journal ◽

10.1016/j.cej.2021.129809 ◽

2021 ◽

pp. 129809

Author(s):

Wei Zhan ◽

Lipin Li ◽

Yu Tian ◽

Yongjia Lei ◽

Wei Zuo ◽

...

Keyword(s):

Fatty Acids ◽

Activated Sludge ◽

Ferric Chloride ◽

Anaerobic Fermentation ◽

Short Chain Fatty Acids ◽

Short Chain ◽

Waste Activated Sludge ◽

Insight Into ◽

Performance And Mechanism ◽

Chain Fatty Acids

Download Full-text

Improvement of sewage sludge dewatering using Ferric Chloride, Aluminum Sulfate and Calcium Oxide (experimental investigation and descriptive statistical analysis)

Water Environment Research ◽

10.1002/wer.1526 ◽

2021 ◽

Author(s):

Flora Ranjbar ◽

Mohsen Karrabi ◽

Shahnaz Danesh ◽

Mohammad Gheibi

Keyword(s):

Experimental Investigation ◽

Statistical Analysis ◽

Sewage Sludge ◽

Calcium Oxide ◽

Ferric Chloride ◽

Aluminum Sulfate ◽

Sludge Dewatering ◽

Descriptive Statistical Analysis

Download Full-text

Using seafood waste as sludge conditioners

Water Science & Technology ◽

10.2166/wst.2001.0646 ◽

2001 ◽

Vol 44 (10) ◽

pp. 301-307 ◽

Cited By ~ 10

Author(s):

D.Y. Lee ◽

S.R. Jing ◽

Y.F. Lin

Keyword(s):

Ferric Chloride ◽

Specific Resistance ◽

Oyster Shell ◽

Particle Sizes ◽

Sludge Dewatering ◽

Insignificant Effect ◽

Shrimp Shell ◽

Ph Decrease ◽

Shell Particles ◽

Bone Particles

In this study, three kinds of seafood wastes (shrimp shell particles, oyster shell particles, and internal bone particles of squid) were added to dewatered sludge preconditioned with chemical conditioner (alum or ferric chloride). The specific resistance of sludge dewatering was calculated to evaluate the effectiveness of sludge dewatering. The result showed that adding chemical conditioners alone caused noticeable pH decrease and resulted in a conditioned sludge with poor filterability. The addition of oyster shell or internal bone of squid to chemically preconditioned sludge efficiently improved sludge dewatering. This result was possibly due to both the availability of alkaline and the function as skeleton builder provided by these two waste solids. Particle sizes (0.59-2.0 mm) of oyster shell and internal bone of squid were found to have insignificant effect on sludge dewatering.

Download Full-text