Phosphorus Pollution Control by Stormwater Bioretention Systems

2013 ◽  
Vol 726-731 ◽  
pp. 1817-1822
Author(s):  
Fu Guo Qiu ◽  
Yu Wang
Keyword(s):  
Pollution Control ◽  
Phosphorus Removal ◽  
Suspended Solids ◽  
Phosphorus Leaching ◽  
Research Needs ◽  
Phosphorus Pollution ◽  
Phosphorus Forms ◽  
Study Progress ◽  
The Matrix ◽  
Nitrogen Phosphorus

This paper reviewed the development of bioretention systems with a focus on its abilities to control phosphorus in stormwater. Bioretention systems takes full advantage of the matrix-microbes-plant system with simultaneous removal of organic matter, nitrogen, phosphorus, total suspended solids (TSS), heavy metal, and pathogens. But phosphorus removal has been found inconsistent in bioretention systems, which can be observed phosphorus leaching in some systems. The phosphorus forms in stormwater, the distribution and transfer pathways of phosphorus in bioretention system need to be figured out and simulated in order to solve the phosphorus leaching. Some new matrix materials, such as aluminum-based water treatment residual, were also employed to adsorb and trap the phosphorus in stormwater. The latest study progress and further research needs of bioretention systems were summarized.

scholarly journals Performance of Filterbeds and Macrophytes in Vertical Constructed Wetland for Treating Domestic Sewage Effluent

2021 ◽  
Author(s):  
Vanitha Thammaiah ◽  
Manjunatha Hebbara ◽  
Manjunatha Mudukapla Virupakshappa
Keyword(s):  
Constructed Wetland ◽  
Suspended Solids ◽  
Typha Latifolia ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Organic N ◽  
Sewage Effluent ◽  
Ammoniacal Nitrogen ◽  
Wetland Treatment ◽  
Nitrogen Phosphorus

Abstract An experiment with different filterbeds and macrophytes was carried-out to study their phytoremediation capacity on the efficiency of domestic wastewater treatment through constructed wetland (CW) during November to March, 2017-18 at University of Agricultural Sciences, Dharwad campus, Karnataka, India. Twenty treatment combinations involving five types of filterbeds (FB-1: gravel, FB-2: gravel-sand-gravel, FB-3: gavel-sand-brick-gravel, FB-4: gravel-sand-charcoal-gravel and FB-5: gravel-sand-(charcoal+brick)-gravel) and four macrophytes (MP-1: Typha latifolia, MP-2: Brachiaria mutica, MP-3: Canna indica and MP-4: Phragmites sps.) were evaluated for treating domestic wastewater. After 120 days from start, across treatment combinations, water electrical conductivity (EC), total dissolved and suspended solids (TDS-TSS), biological oxygen demand (BOD), chemical oxygen demand (COD), sodium, sodium adsorption ratio (SAR), residual sodium carbonate (RSC), bicarbonates, total nitrogen-phosphorus-potassium (N-P-K) and boron (B) were reduced by more than 40 per cent due to wetland treatment. The system enhanced the mineralization of organic nitrogen to ammoniacal nitrogen (NH4+-N) and nitrate nitrogen (NO3-N) fractions. Among filterbeds, Type-5 caused higher reduction in pH, EC, BOD, COD and Organic-N while, Type-4 proved efficient in removing total solids and lowering pH in the sewage effluent. The Type-3 filterbed removed more suspended solids, potassium and ammoniacal nitrogen. Among the macrophytes, Brachiaria (paragrass) removed more nitrogen and potassium while, Phragmites removed more nitrogen, phosphorus and boron. The flexibility of implementation allows the CW to be adapted to different sites with different configurations, being suitable as main, secondary or tertiary treatment stage.

scholarly journals Determination of Insecticides in Honey by Matrix Solid-Phase Dispersion and Gas Chromatography with Nitrogen–Phosphorus Detection and Mass Spectrometric Confirmation

2002 ◽  
Vol 85 (1) ◽  
pp. 128-133 ◽  
Author(s):  
Consuelo Sánchez-Brunete ◽  
Beatriz Albero ◽  
Ester Miguel ◽  
José Luis Tadeo
Keyword(s):  
Solid Phase ◽  
Single Step ◽  
Organophosphorus Insecticides ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Relative Standard ◽  
The Matrix ◽  
Low Volume ◽  
Nitrogen Phosphorus

Abstract A multiresidue method was developed for the determination of 12 organophosphorus insecticides (diazinon, parathion methyl, fenitrothion, pirimiphosmethyl, malathion, fenthion, chlorpyrifos, quinalphos, methidathion, ethion, azinphosmethyl, coumaphos), one carbamate (pirimicarb), and one amidine (amitraz) in unifloral and multifloral honeys. The analytical procedure was based on the matrix solid-phase dispersion of honey on a mixture of Florisil and anhydrous sodium sulfate in small glass columns and subsequent extraction with a low volume of hexane–ethyl acetate (90 + 10, v/v), assisted by sonication. The insecticide residues were determined by capillary chromatography with nitrogen–phosphorus detection and confirmed by mass spectrometry. Average recoveries at the 0.05–0.5 μg/g levels were >80% for organophosphorus insecticides and about 60% for the other insecticides, pirimicarb and amitraz, with relative standard deviations <10%. The detection limit for the different insecticides ranged between 6 and 15 μg/kg. The main advantages of the proposed method are that extraction and cleanup are performed in a single step with a low volume of organic solvent. The method is simple, rapid, and less laborious than conventional methods. Several Spanish honeys were analyzed with the proposed method and no residues of the studied insecticides were found.

scholarly journals Forms of Nitrogen and Phosphorus in Suspended Solids: A Case Study of Lihu Lake, China

2020 ◽  
Vol 12 (12) ◽  
pp. 5026 ◽  
Author(s):  
Jialu Li ◽  
Qiting Zuo
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Inorganic Phosphorus ◽  
Nitrogen And Phosphorus ◽  
Lake Ecosystems ◽  
Phosphorus Forms ◽  
Sequential Extraction Method ◽  
Main Component ◽  
The Impact

Suspended solids are an important part of lake ecosystems, and their nitrogen and phosphorus contents have a significant effect on water quality. However, information on nitrogen and phosphorus forms in suspended solids remains limited. Therefore, a case study was conducted in Lihu Lake (China), a lake with characteristically high amounts of suspended solids. Nitrogen and phosphorus speciation in suspended solids was analyzed through a sequential extraction method. We also evaluated the sources of various forms of nitrogen and phosphorus and their different effects on eutrophication. The total nitrogen (TN) content was 758.9–3098.1 mg/kg. Moreover, the proportions of various N forms in the suspended solids of the study areas were ranked as follows: Hydrolyzable nitrogen (HN) > residual nitrogen (RN) > exchangeable nitrogen (EN). Total phosphorus (TP) ranged from 294.8 to 1066.4 mg/kg, and 58.6% of this TP was inorganic phosphorus (IP). In turn, calcium (Ca)-bound inorganic phosphorus (Ca-Pi) was the main component of IP. The correlation between various nitrogen and phosphorus forms showed that there were different sources of suspended nitrogen and phosphorus throughout Lihu Lake. Correlation analysis of water quality indices and comparative analysis with surface sediments showed that in Lihu Lake, the dissolved nitrogen and phosphorus contents in water were influenced by sediment through diffusion, while particle phosphorus content in water was influenced by suspended solids through adsorption; however, due to the higher phosphorus contents in suspended solids, we should pay more attention to the impact of suspended solids.

scholarly journals Preparation, Performances, and Mechanisms of Microbial Flocculants for Wastewater Treatment

2020 ◽  
Vol 17 (4) ◽  
pp. 1360 ◽  
Author(s):  
Huiru Li ◽  
Shaohua Wu ◽  
Cheng Du ◽  
Yuanyuan Zhong ◽  
Chunping Yang
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Suspended Solids ◽  
Current Status ◽  
Future Research ◽  
Research Needs ◽  
Close Attention ◽  
Charge Neutrality ◽  
Environmental Friendliness ◽  
Preparation Methods

In recent years, close attention has been paid to microbial flocculants because of their advantages, including safety to humans, environmental friendliness, and acceptable removal performances. In this review, the preparation methods of microbial flocculants were first reviewed. Then, the performances of bioflocculants in the removal of suspended solids, heavy metals, and other organic pollutants from various types of wastewater were described and commented, and the removal mechanisms, including adsorption bridging, charge neutralization, chemical reactions, and charge neutrality, were also discussed. The future research needs on microbial flocculants were also proposed. This review would lead to a better understanding of current status, challenges, and corresponding strategies on microbial flocculants and bioflocculation in wastewater treatment.

Research on the Purification Ability of Porous Asphalt Pavement to Runoff Pollution

2012 ◽  
Vol 446-449 ◽  
pp. 2439-2448 ◽  
Author(s):  
Yao Zhao ◽  
Chen Zhao
Keyword(s):  
Laboratory Experiments ◽  
Suspended Solids ◽  
Field Studies ◽  
Research Needs ◽  
Runoff Water ◽  
Porous Asphalt ◽  
Urban Stormwater Management ◽  
Current Trends ◽  
Effective Technology ◽  
Pavement Structures

PAP has widely used in Europe, the U.S, and Japan. As an effective technology for urban stormwater management, PAP not only decreases stormwater volumes but also improves runoff water quality including heavy metals, suspended solids (SS) and nutrients. In addition, it help protects groundwater and urban environment. In this paper the current trends of investigating the purification ability of PAP are introduced. The characteristics, the pavement structures and materials are analyzed. The recent researches in field studies and laboratory experiments are highlighted. The present applications of and challenges to PAP are discussed. Further research needs are recommended.

Assessment of nitrogen and phosphorus removal in an intermittently aerated sequencing batch reactor (IASBR) and a sequencing batch reactor (SBR)

2013 ◽  
Vol 68 (2) ◽  
pp. 400-405 ◽  
Author(s):  
Min Pan ◽  
Tianhu Chen ◽  
Zhenhu Hu ◽  
Xinmin Zhan
Keyword(s):  
Phosphorus Removal ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Ammonium Nitrogen ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
P Release ◽  
Removal Efficiencies ◽  
Biological Nitrogen

Biological nitrogen and phosphorus removal was investigated in an intermittently aerated sequencing batch reactor (IASBR) and a sequencing batch reactor (SBR). The removal efficiencies of ammonium-nitrogen (NH4+-N) were 100% in both reactors in steady operation state. The total nitrogen (TN) removal efficiencies were 90.4% in the IASBR and 79.3% in the SBR, while the total phosphorus (TP) removal efficiencies were 88.8% in the IASBR and 82.3% in the SBR. The efficiencies of simultaneous nitrification and denitrification (SND) were 90.4% in the IASBR and 79.3% in the SBR, indicating that the IASBR was more efficient than the SBR in SND. The sludge in the IASBR had a P release capability of 16.6 mg P/g VSS (volatile suspended solids) but only 7.5 mg P/g VSS in the SBR.

scholarly journals Study on purification effect of infiltration materials to pavement runoff pollution

2018 ◽  
Vol 53 ◽  
pp. 04045
Author(s):  
Xueling Xu ◽  
Aihong Kang ◽  
Zhingping Lu ◽  
Keke lou ◽  
Changjiang Kou
Keyword(s):  
Pollution Control ◽  
Suspended Solids ◽  
Control Measure ◽  
Low Impact Development ◽  
Purification Process ◽  
Purification Efficiency ◽  
Three Stages ◽  
Runoff Pollution Control ◽  
Runoff Pollution

The concentrations of pollutants in pavement runoff are higher than those in other surface runoff normally, which causes serious problems in protecting the environment of receiving rivers and soils. According to the concept of low impact development (LID), a pavement runoff pollution control measure was developed by using infiltration structure. In order to infiltration structure play a superior role in the control of pavement runoff pollution, purification capacity of four typical infiltration materials was tested. Then, long-term purification efficiency of infiltration materials was explored to suspended solids. Besides, microscopic observation was performed on infiltration materials. Results indicated that purification effects of infiltration materials were significantly different. The purification process can be divided into three stages, which ware "rapid upgrading ", "slow upgrading " and "slow reduction ". Finally, Infiltration materials mainly have two modes to intercept runoff pollutants, which were pore adsorption and mechanical interception of the gap between materials.

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