Hydrothermally modified fly ash for heavy metals and dyes removal in advanced wastewater treatment

2014 ◽  
Vol 303 ◽  
pp. 14-22 ◽  
Author(s):  
Maria Visa ◽  
Andreea-Maria Chelaru
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Fly Ash ◽  
Advanced Wastewater Treatment ◽  
Modified Fly Ash ◽  
Dyes Removal

Utilization of cationic polymer-modified fly ash for dye wastewater treatment

2021 ◽  
Author(s):  
Jingye Zhou ◽  
Kai Xia ◽  
Xin Liu ◽  
Long Fang ◽  
Hui Du ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Fly Ash ◽  
Cationic Polymer ◽  
Dye Wastewater ◽  
Modified Fly Ash

The Influence of Modification Conditions on Activation of Coal Fly Ash

2013 ◽  
Vol 813 ◽  
pp. 471-474
Author(s):  
Hui Ping Song ◽  
Fang Bin Xue ◽  
Fang Qin Cheng ◽  
Yan Xia Guo ◽  
Huai Gang Cheng
Keyword(s):  
Wastewater Treatment ◽  
Fly Ash ◽  
Sodium Hydroxide ◽  
Hydrothermal Treatment ◽  
Theoretical Basis ◽  
Coal Fly Ash ◽  
Modified Fly Ash

The sodium hydroxide calcination-hydrothermal treatment was used to modify the fly ash in this paper. The mount of alkali, the ratio of solid and liquid and the temperature of calcination were respectively studied in the process of modification. The best modified condition is that the ratio of sodium hydroxide and fly ash was 0.4:1, the ratio of solid and liquid was 1:1, and the temperature of calcination was 400°C. The zeolite-like structure was generated after modification. The modified fly ash in this paper was cheap and effective, providing a theoretical basis for wastewater treatment.

Simultaneous Adsorption of Methyl Orange and Heavy Metals from Solution Using Fly Ash

2009 ◽  
Vol 79-82 ◽  
pp. 247-250 ◽  
Author(s):  
Maria Visa ◽  
Alexandru Enesca ◽  
Anca Duta
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Methyl Orange ◽  
Treatment Process ◽  
Ionic Species ◽  
Single Step ◽  
Langmuir Model ◽  
Adsorption Mechanisms ◽  
Modified Surface ◽  
Modified Fly Ash

In a wastewater resulted from the dyes finishing industry there are amounts of dyes (very common Methyl Orange) and heavy metals resulted mainly from the organo-metallic dyes. Heavy metals (Cd2+ and Cu2+) advanced removal is usually proposed via adsorption and the use of modified fly ash as adsorbent represents a sustainable solution. The paper presents the results obtained in investigating the effect of methyl orange adsorbed onto the fly ash with modified surface, on the removal efficiency of cadmium and copper ionic species, considering the final application: a single step treatment process applied for wastewaters containing both heavy metals and dyes. The adsorption mechanisms are discussed based on the kinetic results and on the Langmuir model.

Conditioning of oily sludges with municipal solid wastes incinerator fly ash

1997 ◽  
Vol 35 (8) ◽  
pp. 231-238 ◽  
Author(s):  
Tay Joo Hwa ◽  
S. Jeyaseelan
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Specific Resistance ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Solid Wastes ◽  
Municipal Solid Wastes ◽  
Capillary Suction ◽  
Optimum Dosage

Conditioning of sludges improves dewatering characteristics and reduces the quantity of sludge to be handled. Anaerobic digested sludge collected from a sewage treatment plant contained 1.8% to 8% oil. The increase of specific resistance and capillary suction time (CST) with increasing oil content observed in these samples indicates the interference of oil in dewatering. It has been found that addition of municipal solid wastes incinerator fly ash decreases the specific resistances and capillary suction times of oily sludges rapidly up to 3% dosage. Beyond 3% fly ash, the decrease is less significant and the solids content in the sludge cake increases. This optimum dosage remains the same for sludges with varying oil contents from 1.8% to 12%. The total suspended solids of filtrate decreases with fly ash dosage but the toxic concentrations of heavy metals increases considerably. However at the optimum dosage of 3%, concentrations of heavy metals are within the limits for discharging into the sewers. The correlations of CST with the dewatering characteristics such as specific resistance, filter yield and corrected filter yield are established. These correlations can be used to obtain a quick prediction on dewaterability.

Next Level Watershed Protection by Combining Advanced Wastewater Treatment with Phosphorus Offset Program

2015 ◽  
Vol 2015 (18) ◽  
pp. 640-651
Author(s):  
Heather M Brewer ◽  
Ben Samuell ◽  
Emil Rafanan ◽  
Chad Horan
Keyword(s):  
Wastewater Treatment ◽  
Watershed Protection ◽  
Advanced Wastewater Treatment

A novel Fe recycling method from pickling wastewater producing a KFeS2 whisker for electroplating wastewater treatment

2021 ◽  
Author(s):  
Dongxu Liang ◽  
Manhong Ji ◽  
Suiyi Zhu ◽  
Yu Chen ◽  
Zhihua Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Hydrothermal Method ◽  
Facile Hydrothermal Method ◽  
Electroplating Wastewater ◽  
Pickling Sludge

Pickling sludge was converted to a novel product of KFeS2 nanorods via a facile hydrothermal method that effectively removes heavy metals from electroplating wastewater.

Sign in / Sign up

Export Citation Format

Share Document