Effective removal of phosphorus from eutrophic water by using cement

Liu, Benhong; Liu, Lei; Li, Wei

doi:10.1016/j.envres.2020.109218

Cited by 23 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All the chemicals used in this study were of analytical reagent grade. Phosphorous solutions with different concentrations were prepared from KH 2 PO 4 , and the pH value of the solutions was adjusted with 0.1 mol/L hydrochloric acid and 0.1 mol/L sodium hydroxide [ 25 ]. Water-based polyurethane, hydroxyethyl cellulose, potassium dihydrogen phosphate (KH 2 PO 4 ), ammonium molybdate [(NH 4 ) 6 Mo 7 O 24 ·4H 2 O], concentrated sulfuric acid, ascorbic acid (C 6 H 8 O 6 ), potassium persulfate, and potassium antimony tartrate (C 4 H 4 KO 7 Sb·1/2H 2 O) [ 26 ] were obtained from Zhengzhou Heshun Technology Co., Ltd. (Zhengzhou, China), and all solutions were prepared using deionized water (the conductivity of deionized water is 1.0 µs/cm).…”

Section: Methodsmentioning

confidence: 99%

Preparation of a New Iron-Carbon-Loaded Constructed Wetland Substrate and Enhanced Phosphorus Removal Performance

2020

View full text Add to dashboard Cite

Iron-carbon substrates have attracted extensive attention in water treatment due to their excellent processing ability. The traditional iron-carbon substrate suffers from poor removal effects, separation of the cathode and anode, hardening, secondary pollution, etc. In this study, a new type of iron-carbon-loaded substrate (NICLS) was developed to solve the problems of traditional micro-electrolytic substrates. Through experimental research, a preparation method for the NICLS with Fe and C as the core, zeolite as the skeleton, and water-based polyurethane as the binder was proposed. The performance of the NICLS in phosphorus-containing wastewater was analyzed. The results are as follows: The optimal synthesis conditions of the NICLS are 1 g hydroxycellulose, wood activated carbon as the cathode, an activated carbon particle size of 200-60 mesh, and an Fe/C ratio of 1:1. Acidic conditions can promote the degradation of phosphorus by the NICLS. Through the characterization of the NICLS (scanning electron microscope (SEM), X-ray diffractometer (XRD), and energy-dispersive spectrometer (EDS), etc.), it is concluded that the mechanism of the NICLS phosphorus removal is a chemical reaction produced by micro-electrolysis. Using the NICLS to treat phosphorus-containing wastewater has the advantages of high efficiency and durability. Therefore, it can be considered that the NICLS is a promising material to remove phosphorus.

show abstract

Section: Methodsmentioning

confidence: 99%

Preparation of a New Iron-Carbon-Loaded Constructed Wetland Substrate and Enhanced Phosphorus Removal Performance

2020

View full text Add to dashboard Cite

show abstract

“…During the hydration reaction of cement, soluble phosphate reacts with Ca 2+ , thus adsorbing on the surface of the cement particles and retarding the hydration reaction of the cement, while forming a protective layer of calcium phosphate. Liu studied that in an acidic environment, phosphorus precipitates mainly as H 3 PO 4 , H 2 PO, and CaH 2 PO in a toxic leachate backfilling with PG, while in a neutral environment, phosphate starts to precipitate as small amounts of soluble calcium phosphate (hydroxyapatite and calcium fluorophosphate), and in an environment with an alkaline pH, the increase in Ca 2+ and F + leads to the precipitation of phosphate in the form of a dilute increased binding of soluble calcium [ 44 , 45 , 46 , 47 , 48 ]. The M1, M2, and M3 groups were considered as the central sources of TP concentrations of the backfilling bodies from which TP is leached to study the diffusion transport of TP in groundwater under different leaching concentrations in the backfilling bodies.…”

Section: Resultsmentioning

confidence: 99%

The Phosphorus Transport in Groundwater from Phosphogypsum-Based Cemented Paste Backfill in a Phosphate Mine: A Numerical Study

Chen

Zhou

Liu

et al. 2022

IJERPH

View full text Add to dashboard Cite

Stacked phosphogypsum (PG) can not only cause a waste of resources but also has a serious negative impact on the surface environment. Phosphogypsum backfilling (PGB) in the underground goaf is a useful approach to effectively address the PG environmental problems. However, the effects of this approach on the groundwater environment have not been studied. Therefore, the present study aims to assess the spatiotemporal evolution mechanism of total phosphorus (TP) in groundwater to solve the diffusion regular pattern of TP in PGB bodies, as well as to manage and mitigate the impacts of TP on the groundwater system. In this study, leaching toxicity experiments and a numerical groundwater simulation software (GMS10.4) were combined to develop a three-dimensional conceptual model for predicting the groundwater flow and contaminant transport under steady-state conditions in a phosphorus mine in Anhui. The results showed a lower TP concentration than the TP standard concentration (0.2 mg/L) at a source concentration of 0.59 mg/L. However, groundwater TP source concentrations of 1.88 and 2.46 mg/L in the study area were found to exceed the standard concentration for a certain time and areas. In addition, the transport and dispersion of TP are influenced not only by the groundwater flow field, drainage ditches, rivers, and wells but also by the adsorption and attenuation effects of the soil that occur during the transport process, affecting the dispersion distance and distribution of groundwater TP concentrations. The results of the present study can promote the development of groundwater-friendly PGB technology, providing a great significance to the construction of green mines and the promotion of ecological civilization.

show abstract

“… 17 In addition to its great contribution to the construction industry, cement has been preliminarily identified as having considerable potential in P adsorption. 18,19 For instance, aluminate cement thermally activated at 600 °C demonstrated a P adsorption capacity of 49.1 mg g −1 . 19 The introduction of Portland cement into eutrophic water bodies led to a reduction in total P from 2.2 to 0.2 mg L −1 .…”

Section: Introductionmentioning

confidence: 99%

“… 19 The introduction of Portland cement into eutrophic water bodies led to a reduction in total P from 2.2 to 0.2 mg L −1 . 18 Limestone, constituting approximately 80 wt%, 17 is the primary raw material for Portland cement production and likely contributes to its high P adsorption capacity. Currently, the main types of cement include Ordinary Portland cement (OPC), Portland slag cement (PSC), Portland pozzolana cement (PPC), calcium aluminate cement (CAC), and low alkalinity calcium sulfoaluminate cement (CSA), each characterized by distinct compositions.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus adsorption from aqueous solutions using different types of cement: kinetics, isotherms, and mechanisms

Yu,

Yang,

Zhang

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

Effective removal of phosphorus from eutrophic water by using cement

Cited by 23 publications

References 19 publications

Preparation of a New Iron-Carbon-Loaded Constructed Wetland Substrate and Enhanced Phosphorus Removal Performance

Preparation of a New Iron-Carbon-Loaded Constructed Wetland Substrate and Enhanced Phosphorus Removal Performance

The Phosphorus Transport in Groundwater from Phosphogypsum-Based Cemented Paste Backfill in a Phosphate Mine: A Numerical Study

Phosphorus adsorption from aqueous solutions using different types of cement: kinetics, isotherms, and mechanisms

Contact Info

Product

Resources

About