Adsorption of Nitrogen and Phosphorus on Natural Zeolite and its Influencing Factors

2011 ◽  
Author(s):  
Tan Wanchun ◽  
Wang Qiuyun ◽  
Wang Yunbo ◽  
Pan Zhengke
Keyword(s):  
Influencing Factors ◽  
Natural Zeolite ◽  
Nitrogen And Phosphorus ◽  
Adsorption Of Nitrogen

Adsorption of nitrogen and phosphorus by intact cells and cell wall polysaccharides of Microcystis

2013 ◽  
Vol 25 (5) ◽  
pp. 1539-1544 ◽  
Author(s):  
Shan-Shan Li ◽  
Jian-Hong Li ◽  
Ming-Sheng Xia ◽  
Yan-Yan Meng ◽  
Hui Zhang
Keyword(s):  
Cell Wall ◽  
Cell Wall Polysaccharides ◽  
Nitrogen And Phosphorus ◽  
Intact Cells ◽  
Adsorption Of Nitrogen

scholarly journals Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Tingyu Fan ◽  
Miao Wang ◽  
Xingming Wang ◽  
Yingxiang Chen ◽  
Shun Wang ◽  
...  
Keyword(s):  
Adsorption Isotherm ◽  
Clay Minerals ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Order Kinetic ◽  
Natural Clay ◽  
Nitrogen And Phosphorus ◽  
Adsorption Capacities ◽  
Adsorption Of Nitrogen ◽  
Kinetics And Isotherms

Nitrogen and phosphorus are commonly recognized as causing eutrophication in aquatic systems, and their transport in subsurface environments has also aroused great public attention. This research presented four natural clay minerals (NCMs) evaluated for their effectiveness of NH4+ and PO43- adsorption from wastewater. All the NCMs were fully characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), BET analysis, and adsorption kinetics and isotherms to better understand the adsorption mechanism-property relationship. The results show that the adsorption efficiency of the four NCMs for phosphate was better than that for ammonia nitrogen. The removal rate of phosphate was higher than 65%, generally in the range of 80%-90%, while the removal rate of ammonia nitrogen was less than 50%. The adsorption kinetic behavior followed the pseudo-second-order kinetic model. The ammonia nitrogen adsorption isotherm was in good agreement with the Freundlich isotherm equilibrium model, and the phosphate adsorption isotherm matched the Langmuir model. Among all the NCMs studied, bentonite (7.13 mg/g) and kaolinite (5.37 mg/g) showed higher adsorption capacities for ammonia nitrogen, while zeolite (0.21 mg/g) and attapulgite (0.17 mg/g) showed higher adsorption capacities for phosphate. This study provides crucial baseline knowledge for the adsorption of nitrogen and phosphate by different kinds of NCMs.

scholarly journals Use of zeolites for macronutrients removal from wastewater

2019 ◽  
Vol 12 (1) ◽  
pp. 150-161
Author(s):  
Barbora Urminská ◽  
Ján Derco ◽  
Ronald Zakhar ◽  
Adriana Korpicsová
Keyword(s):  
Removal Efficiency ◽  
Phosphorus Removal ◽  
Natural Zeolite ◽  
Ammonium Nitrogen ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Physical Chemical ◽  
Synthetic Zeolites ◽  
Modified Zeolites ◽  
Preliminary Research

Abstract Natural or synthetic zeolites have unique physical, chemical and structural properties that predetermine their use in many processes, including wastewater treatment. This study presents the results of our preliminary research in the field of nitrogen and phosphorus removal using adsorption and adsorptive ozonation with natural and modified zeolites. Iron-modified zeolite was the most efficient for the removal of ammonium nitrogen by adsorption. Phosphorus removal efficiency using adsorption was relatively low and natural zeolite was not suitable for the phosphorus removal at all. Ozone had no significant impact on the removal efficiency. Regeneration of loaded zeolites with ozone has also been studied. This method was partly efficient but it needs be further examined.

scholarly journals Biomass accumulation-influencing factors in microalgae farms

2020 ◽  
Vol 24 (2) ◽  
pp. 134-139
Author(s):  
Gerson O. L. Pedruzi ◽  
Matheus L. Amorim ◽  
Raquel R. Santos ◽  
Márcio A. Martins ◽  
Marcelo G. M. V. Vaz
Keyword(s):  
Growth Rate ◽  
Light Intensity ◽  
Influencing Factors ◽  
Biomass Accumulation ◽  
Gas Diffusion ◽  
Flue Gases ◽  
Nitrogen And Phosphorus ◽  
Nutrient Distribution ◽  
Diffusion Of Gases

ABSTRACT Due to the emergence of large microalgae farms and increased competition in this sector, the search for higher productivity is common. One way to achieve this goal in microalgae production is to optimize the factors that influence their growth during the cultivation stage to increase the accumulation of bio-compounds of interest. In this stage, the factors that most influence are: nutrition, gas diffusion, light intensity and quality and, finally, stirring, which directly affects all other factors. Thus, a review and an evaluation of the influence and importance of stirring were performed in the present study. The nutrients that most influence biomass accumulation are carbon, nitrogen and phosphorus, but their proportion is directly related to the proposed objective for microalgae. In the diffusion of gases, it is essential to supply adequate CO2 for the growth of microalgae, and flue gases can be used. Also, it is necessary to ensure proper removal of photosynthetic O2, which could inhibit microalgae metabolism and slow their growth rate. It is important to provide the appropriate light intensity for photosynthesis, but excess may cause photoinhibition in cultivation. Stirring is of paramount importance to ensure nutrient distribution in the medium, gas diffusion (incorporation of CO2 and removal of O2) and adequate exposure of microalgae to light, reducing the effects of photoinhibition and self-shading.

scholarly journals ADSORPTION OF PHENOLS FROM OLIVE OIL MILL WASTEWATER AS WELL AS N AND P FROM A SIMULATED CITY WASTEWATER LIQUID ON ACTIVATED GREEK LIGNITES

2017 ◽  
Vol 43 (5) ◽  
pp. 2294
Author(s):  
C. Papanicolaou ◽  
G. Triantafyllou ◽  
Ν. Pasadakis ◽  
Α,Ε. Foscolos
Keyword(s):  
Olive Oil ◽  
Surface Area ◽  
Oxygen Demand ◽  
Medium Size ◽  
Nitrogen And Phosphorus ◽  
Olive Oil Mill Wastewater ◽  
Cod Reduction ◽  
Economic Exploitation ◽  
Activated Coal ◽  
Adsorption Of Nitrogen

The results show that surface area of activated coal samples increased substantially and in some more than the commercial one. The increase in surface area was higher the higher the carbon content and the lower the ash content. The adsorption capacity of phenols and the decrease of COD (Chemical Oxygen Demand) in olive oil mil wastewater disposals were measured in selected samples as well as the decrease of COD and the adsorption of nitrogen and phosphorus from a solution which simulates city waste disposals were measured in 14 selected Greek lignites and 1 commercially available activated lignite sample (HOK). The maximum recorded adsorption of phenol was 30.6 mg/g of activated lignite while the commercial one (HOK) adsorbed 16 mg/g of activated lignite. The COD reduction was 1262 mg of COD/g of activated lignite while in the commercial one the reduction was 439 mg of COD/g of activated lignite. The maximum adsorption of N and P from the simulated city waste liquid was 6.41 mg/g of activated lignite and 2.52 mg/g of activated lignite, respectively. while the commercial one (HOK) adsorbed 2.84 mg/g and 2.42 mg/g, respectively. Finally, the COD reduction was 50.28 mg/g of activatedlignite and 34.92 mg/g for the commercially one (HOK). The results show that Greek activated lignites can be used successfully for cleaning industrial and city wastes. These findings open the door for the economic exploitation of small to medium size lignite deposits in Greece, which are widespread in Greece.

Spatial changes and influencing factors of fine root carbon, nitrogen and phosphorus stoichiometry of plants in China

2015 ◽  
Vol 39 (2) ◽  
pp. 159-166 ◽  
Author(s):  
MA Yu-Zhu ◽  
◽  
ZHONG Quan-Lin ◽  
JIN Bing-Jie ◽  
LU Hong-Dian ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Fine Root ◽  
Nitrogen And Phosphorus ◽  
Root Carbon ◽  
Spatial Changes
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