The Phosphorus Removal Characteristics of Grain-Slag as Filter Media

2011 ◽  
Vol 306-307 ◽  
pp. 1488-1491
Author(s):  
Yan Feng ◽  
Yan Zhen Yu ◽  
Man Tun Li ◽  
Lei Cheng
Keyword(s):  
Surface Area ◽  
Phosphorus Removal ◽  
Removal Rate ◽  
Total Porosity ◽  
Total Surface Area ◽  
Phosphate Removal ◽  
Filter Media ◽  
Pore Characteristics ◽  
Filter Materials ◽  
Initial Ph

A novel filter media-grain slag as filter media for the removal of phosphorous studied in the paper. The characteristics of grain-slag and haydite such as total porosity, total surface area, pore size distribution, apparent and bulk density, crystal structures and chemical composition were evaluated for the two materials firstly. The data of pore characteristics and surface morphology of filter materials showed grain-slags were superior to haydites in many ways, including higher total porosity, larger total surface area and lower density. These characteristics were essential for filter materials. Subsequently, the pH of solution and contact time was evaluated in batch phosphate sorption experiments for the two materials. The results showed the phosphate removal rate of grain-slag was higher than haydite. The phosphate removal of the grain-slag tended to decrease with increasing initial pH above neutral. Therefore, grain-slag application, as a novel process of treating phosphorus with wastes, provided a promising way in grain slag utilization.

Effect of Environment Factors on Phosphorus Removal Efficiency of Phosphate Reduction System

2011 ◽  
Vol 255-260 ◽  
pp. 2797-2801
Author(s):  
Chen Yao ◽  
Chun Juan Gan ◽  
Jian Zhou
Keyword(s):  
Removal Efficiency ◽  
Phosphorus Removal ◽  
Ph Value ◽  
Removal Rate ◽  
Mass Rearing ◽  
Phosphate Removal ◽  
Environment Factors ◽  
Reduction System ◽  
Initial Ph ◽  
The Impact

Effect of environment factors such as initial pH value, dissolved oxygen (DO) and temperature on phosphorus removal efficiency of phosphate reduction system was discussed in treating pickled mustard tube wastewater. Results indicate that environment factors have significant influence on dephosphorization efficiency. And, the impact of DO on phosphate reduction is mainly by affecting the distribution of micro-environment inner biofilm, manifest as phosphate removal rate decreased with a fall in DO concentration, while overhigh DO can lead to detachment of biofilm, thus causing the increase of effluent COD concentration, and so DO need to be controlled in the range of 6 mg/L. Moreover, a higher temperature is more beneficial to phosphorus removal by PRB. Unfortunately, exorbitant temperature can result in mass rearing of Leuconostoc characterized with poor flocculability in reactor, and that cause turbidity in effluent appeared as a rise in COD of effluent. Hence, the optimal temperature is found to be about 30°C.

Potential for Phosphorus Removal in Wastewater Using Volcanic Rock as Adsorbent

2014 ◽  
Vol 1010-1012 ◽  
pp. 202-206
Author(s):  
Chi Zhang ◽  
Zhong Zhong ◽  
Yi Jian Feng ◽  
Lu Sun ◽  
Lu Qi
Keyword(s):  
Particle Size ◽  
Volcanic Rock ◽  
Surface Area ◽  
Phosphorus Removal ◽  
Organic Phosphorus ◽  
Removal Rate ◽  
Exchange Capacity ◽  
Phosphorus Concentration ◽  
Wastewater Purification ◽  
Phosphorus Contamination

Phosphorus contamination in aquatic system was a widespread problem in Zhejiang province due to the excess use of detergent, agrochemicals and other organic phosphorus chemicals. Volcanic rock, an adsorbent with porous structure and large surface area, was applied for phosphorus removal in wastewater. The results showed that the phosphorus removal rate and equilibrium time had positive correlation with the initial phosphorus concentration, while the volcanic rock particle size could also affect the adsorption performance as volcanic rock with smaller particle size used to have a larger cation exchange capacity and higher surface area. Both Langmuir adsorption and the Freundlich adsorption happened throughout phosphorus removal process, showing the strong capacity and capability of volcanic rock as absorbent for phosphorus wastewater. It is promising to use volcanic rock in phosphorus water/wastewater purification systems due its large quantities and accessibility in nature.

The Characteristics and Application of Water Quenched Slag Particles (WQSP) as Filter Media

2010 ◽  
Vol 156-157 ◽  
pp. 1247-1250
Author(s):  
Yan Feng ◽  
Yan Zhen Yu ◽  
Jian Wei Zhang ◽  
Tan Juan
Keyword(s):  
Municipal Wastewater ◽  
Oxygen Demand ◽  
Total Porosity ◽  
Total Surface Area ◽  
Ammonia Nitrogen ◽  
Mass Ratio ◽  
Filter Media ◽  
N Removal ◽  
The Media ◽  
Heavy Metal Elements

Novel filter media-water quenched slag particles (WQSP) were prepared using waste material- Water quenched slag, clay and pore-forming material with a mass ratio of 3:2:1. Compared with haydite, WQSP had higher total porosity, larger total surface area and lower bulk and apparent density. Tests of heavy metal elements in lixivium proved that SGSP were safe for wastewater treatment. In order to ascertain the application of WQSP ，WQSP and haydite were applied as the media of biological aerated filters (BAF) to treat municipal wastewater in two lab scale upflow BAFs. The results showed that WQSP reactor brought a relative superiority to haydite reactor in terms of chemical oxygen demand (CODcr) and ammonia nitrogen (NH3-N) removal at the conditions of water temperature ranging from 200C to 260C and DO ≥4.00 mg·L-1. Therefore, WQSP application, as a novel process of treating wastes with wastes, provided a promising way in water quenched slag utilization.

Study on Modified Ceramic in Treatment of Micro-Polluted Source Water for Strengthening Filtration

2012 ◽  
Vol 500 ◽  
pp. 70-75
Author(s):  
Yuan Yuan Dai ◽  
Jian Yuan ◽  
Jing Ren Zhang ◽  
Lian Wang Wang
Keyword(s):  
Surface Area ◽  
Aluminum Hydroxide ◽  
Removal Rate ◽  
Internal Surface ◽  
Surface Characteristics ◽  
Absorption Capacity ◽  
Ferric Nitrate ◽  
Filter Media ◽  
Internal Surface Area ◽  
Modified Media

As filter media sand, ceramic has the certain removal effect in treating turbidity, organic matter from water .but the removal rate is limited. Modied filter could change filter surface characteristics. in this article, modied ceramic with aluminum hydroxide 。the experimental resulta showe that the trentment effect of ceramics filter coated aluminum is higher than ordinary ceramic in turbidity, CODMn, UV254 in the water, the removal efficacy is 96.64%，38.14%,47.77%respectively,aftercoated aluminum ceramic getting through the filter candle ,the Zeta potential of filter water is more close to zeto point and helpful for adhering to particles and intercepted. Conventional filtering process of water plant adopting quard sand ,ceramic so on media has low treatment tate in low turbidy , contaninging organic micro-polluted source watet .the reason that those media specific surface area is limited ,under neutral condition surface carries negative charge,absorption capacity is little.which affect impurities adhesion on filter materials[1],to make outlet water quality improved ,.people begin to seek economic,good treatment effect filter media,modified media has become a kind of new workmamship in rencent 10 years[2-6]. .Modified media could make ordinary media surface properties improve, enhance intercepting capability and absoption.now much study regard sand as carrier .and ferric chloride,ferric nitrate,aluminum oxide as modifier. adopt study of modified ceramic little,although ceramic has more porosity , aperture and specific sueface area,which formed internal surface area is smaller respectively .accoding to sanitary standard for drinking water ,ameliorating ceramic performance and advancing effluent is urgently to be solve daboutsubject. this study used aluminum hydroxide as modifier ,investigated coater aluminum ceramic filtering effect.

The Study of Phosphorus Removal by Electrocoagulation with Iron-Anodes

2011 ◽  
Vol 183-185 ◽  
pp. 417-421
Author(s):  
Yong Bo Lin ◽  
Yang Yang ◽  
Shuai Wang
Keyword(s):  
Reaction Time ◽  
Total Phosphorus ◽  
Current Density ◽  
Phosphorus Removal ◽  
Removal Rate ◽  
Electrolysis Time ◽  
Optimal Conditions ◽  
Reaction Conditions ◽  
Electrode Distance ◽  
Initial Ph

Determined to adopt iron as anodes, and Ti-base board with coating as cathodes. To optimize the reaction conditions of phosphorus removal by electrocoagulation (EC), testing the effect of current density, electrode distance, initial pH and electrolysis time on the phosphorus removal. According to the results, the optimal conditions for the phosphorus removal in the EC treatment were obtained, i.e., 20 mA/cm2 of current density, 2cm of distance and 10min of reaction time were optimum. Under these conditions, phosphorus removal by electrocoagulation reached to 95.07%, 10min later the change of total phosphorus (TP) removal rate is not obvious. By the end of this test, phosphorus removal by electrocoagulation reached to 99.68%.

Removal of Phosphate Anions from Wastewater by Wasted Low Grade Iron Ore with High Phosphorus Adsorbent

2013 ◽  
Vol 803 ◽  
pp. 127-130 ◽  
Author(s):  
Xiao Li Yuan ◽  
Wen Tang Xia
Keyword(s):  
Iron Ore ◽  
Removal Rate ◽  
Phosphate Removal ◽  
Low Grade ◽  
Optimal Conditions ◽  
Industrial Solid Waste ◽  
High Phosphorus ◽  
Initial Ph ◽  
Phosphate Anions ◽  
Second Category

Low grade ore iron with high phosphorus(LGIOWHP), an industrial solid waste is used as an adsorbent to remove phosphate anions from wastewater. The effects of initial pH, stirring speed, reaction time, reaction temperature and adsorbent dosage on the phosphate removal rate were investigated. The results show that the phosphate removal rate exceed 99% under the optimal conditions. After phosphate removal reaction, the phosphate concentrations completely meet the requirement of national discharge standards of the second category pollution (GB 8978- 1996).

Behaviour of Waterworks Alum Sludge for Phosphate Removal

2015 ◽  
Vol 1113 ◽  
pp. 764-769 ◽  
Author(s):  
Nazirul Mubin Zahari ◽  
Chua Kok Hua ◽  
Lariyah Mohd Sidek
Keyword(s):  
Aquatic Plant ◽  
Agricultural Sector ◽  
Removal Rate ◽  
Phosphate Removal ◽  
Alkaline Condition ◽  
Phosphate Adsorption ◽  
Column Tests ◽  
Chemical Additive ◽  
Initial Ph ◽  
Alum Sludge

In the agricultural sector, fertilizer and animal waste are main pollutants to water course. Excessive phosphorus in water bodies may increase the growth of algae and aquatic plant in a pond which leads to eutrophication phenomena. Disposal of alum sludge in landfills can lead to contaminant issues thus, researchers are searching for ways to reduce excessive disposal of waste including alum sludge in landfills. This study provides available options in disposing alum sludge. In this study, continuous column tests were conducted with different initial pH and contact initial phosphate concentrations. The Scanning Electron Microscope indicates that rough alum sludge surface will accelerate the phosphate adsorption rate. This result shows that phosphate removal rate is higher in acidic condition but lower in alkaline condition. In wastewater treatment industries, changing wastewater to pH 4 needs a large amount of chemical additive and suggests that the pH 7 ±0.5 is more suitable in wastewater applications.

Influence of Temperature on the Total Surface Area of Nanopores of Leningrad Deposits Oil Shale

2020 ◽  
Vol 854 ◽  
pp. 194-199
Author(s):  
Maxim Yu. Nazarenko
Keyword(s):  
Heat Treatment ◽  
Surface Area ◽  
Oil Shale ◽  
Total Porosity ◽  
Total Surface Area ◽  
Initial Sample ◽  
Oil Shale Ash ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Shale Ash

The article is devoted to the analysis of the influence of heat treatment of oil shale of the Leningrad field on the total surface area of nanopores and total porosity. Oil shale with particle size up to 0.125 mm in the form of powder and in the form of shale briquette was subjected to heat treatment. The change in the total porosity was studied in the temperature range (0÷1000) oC. The change in the total surface area of nanopores was studied by comparing the initial sample of oil shale with the oil shale ash obtained at 1000 oC. The data presented in this paper is indicative of a decrease in the oil shale nanopores total surface area under heat treatment, for example, for pore diameters (3÷4) nm the area decreases from 15.29 cm2/g to 2.563 cm2/g.

Wasted Low Grade Iron Ore with High Phosphorus Reuse for Phosphate Removal from Aqueous Solution by Using a Factorial Design

2014 ◽  
Vol 852 ◽  
pp. 106-110
Author(s):  
Xiao Li Yuan ◽  
Wen Tang Xia ◽  
Juan An
Keyword(s):  
Aqueous Solution ◽  
Reaction Time ◽  
Removal Rate ◽  
Orthogonal Experiment ◽  
Phosphate Removal ◽  
Low Grade ◽  
Adsorbent Dosage ◽  
High Phosphorus ◽  
Initial Ph ◽  
Second Category

Low grade ore iron with high phosphorus (LGIOWHP) is used as an adsorbent to remove phosphate from aqueous solution. The orthogonal experiment of L16(45) was used to study the effects of experimental parameters on the phosphate removal rate. The important degree of the effects of parameters on the phosphate removal rate is as follows: initial pH > stirring speed > reaction time > reaction temperature > adsorbent dosage. The results show that the phosphate removal rate exceed 99% under the conditions of pH 5.6, temperature 65 °C, reaction time 75 min, particle size <0.147 mm, initial phosphate concentration 20 mg/L, adsorbent dosage 60g·L-1and stirring speed 200 r·min-1. After phosphate removal reaction, the phosphate concentrations completely meet the requirement of national discharge standards of the second category pollution (GB 8978-1996 ).

scholarly journals Phosphate Removal Using Polyethylenimine Functionalized Silica-Based Materials

2021 ◽  
Vol 13 (3) ◽  
pp. 1502
Author(s):  
Maria Xanthopoulou ◽  
Dimitrios Giliopoulos ◽  
Nikolaos Tzollas ◽  
Konstantinos S. Triantafyllidis ◽  
Margaritis Kostoglou ◽  
...  
Keyword(s):  
Sorption Capacity ◽  
Removal Rate ◽  
Phosphate Concentration ◽  
Phosphate Removal ◽  
Equilibrium Studies ◽  
Maximum Sorption Capacity ◽  
Algae Blooms ◽  
Maximum Sorption ◽  
Phosphate Anions ◽  
Adsorbent Dose

In water and wastewater, phosphate anions are considered critical contaminants because they cause algae blooms and eutrophication. The present work aims at studying the removal of phosphate anions from aqueous solutions using silica particles functionalized with polyethylenimine. The parameters affecting the adsorption process such as pH, initial concentration, adsorbent dose, and the presence of competitive anions, such as carbonate, nitrate, sulfate and chromate ions, were studied. Equilibrium studies were carried out to determine their sorption capacity and the rate of phosphate ions uptake. The adsorption isotherm data fitted well with the Langmuir and Sips model. The maximum sorption capacity was 41.1 mg/g at pH 5, which decreased slightly at pH 7. The efficiency of phosphate removal adsorption increased at lower pH values and by increasing the adsorbent dose. The maximum phosphate removal was 80% for pH 5 and decreased to 75% for pH 6, to 73% for pH 7 and to 70% for pH 8, for initial phosphate concentration at about 1 mg/L and for a dose of adsorbent 100 mg/L. The removal rate was increased with the increase of the adsorbent dose. For example, for initial phosphate concentration of 4 mg/L the removal rate increased from 40% to 80% by increasing the dose from 0.1 to 2.0 g/L at pH 7. The competitive anions adversely affected phosphate removal. Though they were also found to be removed to a certain extent. Their co-removal provided an adsorbent which might be very useful for treating waters with low-level multiple contaminant occurrence in natural or engineered aquatic systems.

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