Preparation of a novel non-burning polyaluminum chloride residue(PACR) compound filler and its phosphate removal mechanisms

Li, Qiang; Zhang, Jingshen; Gao, Jingqing; Huang, Zhenzhen; Zhou, Haomin; Duan, Haoyu; Zhang, Zihao

doi:10.1007/s11356-021-15724-2

Cited by 6 publications

(3 citation statements)

References 73 publications

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“…The results show that Oenanthe javanica and low-temperature resistant Bacillus to TP removal efficiency in VSFCW is limited under low-temperature conditions. These results confirmed that the main pathway of TP removal in VSFCW is physicochemical action of the matrix, including adsorption, coprecipitation, ion exchange, and ligand exchange [6,47,48]. This phenomenon is also reflected in similar literature [16].…”

Section: Wastewater Purification Performance Of Wetland Systemsupporting

confidence: 79%

Purification of Micro-Polluted Lake Water by Biofortification of Vertical Subsurface Flow Constructed Wetlands in Low-Temperature Season

Gao

Zhang

et al. 2022

Water

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In this study, a novel lab-scale biofortification-combination system (BCS) of Oenanthe javanica and Bacillus series was developed to improve the treatment ability of vertical subsurface flow constructed wetlands (VSFCW) at low temperatures (0–10 °C). The results showed that BCS-VSFCW overcame the adverse effects of low temperature and achieved the deep removal of nutrients. In addition, the removal rates of chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) by BCS-VSFCW were 38.65%, 28.20%, 18.82%, and 14.57% higher than those of blank control, respectively. During the experiment, Oenanthe javanica and low temperature tolerant Bacillus complemented each other in terms of microbial activity and plant uptake. Therefore, VSFCW combined with Oenanthe javanica and low temperature tolerant Bacillus has a promising future in low temperature (<10 °C) areas of northern China.

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Section: Wastewater Purification Performance Of Wetland Systemsupporting

confidence: 79%

Purification of Micro-Polluted Lake Water by Biofortification of Vertical Subsurface Flow Constructed Wetlands in Low-Temperature Season

Gao

Zhang

et al. 2022

Water

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“…The amount of PAC waste residue increases with the growing demand for water purification. Typically, this waste residue is treated with simple methods 6 , 7 and disposed of in landfills, posing significant pollution risks to groundwater, soil, and the atmosphere. This situation also hampers the development of the water purification industry.…”

Section: Introductionmentioning

confidence: 99%

The mechanical and frost resistance properties of pressed concrete blocks mixed with the polymeric aluminum chloride waste residue

Xu,

Tong,

Shi

2024

Sci Rep

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This study aims to research on the mechanical and frost resistance properties of pressed concrete blocks mixed with the polymeric aluminum chloride (PAC) waste residue. Experimental studies on the activity index of volcanic ash, mechanical property, frost resistance and microstructure of pressed concrete blocks mixed with PAC waste residue were carried out. The results show that the activity index of volcanic ash of PAC waste residue reaches 74.96% at a particle size of 0.075 mm or less and a curing age of 28 days. Based on results of mechanical property tests, the optimum dosage of PAC waste residue is 15%, at which time the compressive and bending strength only decreases by 14.57% and 15.84%. Based on results of frost resistance tests, the optimum dosage of PAC waste residue for pressed concrete blocks is 10%. After 50 freeze–thaw cycles, when the dosage of PAC waste residue is 10%, the strength loss rate is only 3.04%. XRD and SEM tests show that PAC waste residue participates in chemical reactions. With a small amount of PAC waste residue, the structure of the specimen remains dense and therefore the strength decreases less.

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“…Modified waste residue can also enhance sludge dewatering performance [9] and be utilized in the production of baking-free bricks [10]. Although the existing research has tested and analyzed the chemical composition of PACR [11] and demonstrated its potential activity, in-depth research on the hydration activity of polyaluminum chloride and its influence on cement-based products remains limited. The hydration activity of PACR is a critical factor that determines the strength of cement-based products [12][13][14], necessitating a systematic investigation into PACR's hydration activity and strength, as well as its impact on the microstructure of cement-based materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Polyaluminum Chloride Residue on the Strength and Microstructure of Cement-Based Materials

Xu,

Zhang,

Hou

et al. 2024

FDMP

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In this paper, cement and dechlorinated Polyaluminum Chloride Residue (PACR) have been used to prepare a net slurry and mortar specimens. Two hydration activity indicators have been used to quantitatively analyze the dechlorinated PACR hydration activity. In particular, the effect of dechlorinated PACR content on the compressive strength of mortar has been assessed by means of compressive strength tests. Moreover, X-ray diffraction (XRD) and scanning electron microscopy (SEM) have been employed to observe the microstructure of the considered hydration products. The following results have been obtained. The 28th day activity index of the dechlorinated PACR is 75%, and therefore it meets the criterion for the use of active admixture. The increase in the content of the dechlorinated PACR tends to reduce the compressive strength of mortar specimens, however, it is beneficial to its later strength growth. When the content is not greater than 10%, the strength remains unchanged, otherwise, it decreases. The PACR does not form a new crystalline phase in the cement slurry, and the dechlorinated PACR remains active until the age of the 28th day. The inclusion of the PACR mainly deteriorates the early strength of the cement slurry, but it promotes the production of hydration products in the cement slurry after the 7th day.

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Preparation of a novel non-burning polyaluminum chloride residue(PACR) compound filler and its phosphate removal mechanisms

Cited by 6 publications

References 73 publications

Purification of Micro-Polluted Lake Water by Biofortification of Vertical Subsurface Flow Constructed Wetlands in Low-Temperature Season

Purification of Micro-Polluted Lake Water by Biofortification of Vertical Subsurface Flow Constructed Wetlands in Low-Temperature Season

The mechanical and frost resistance properties of pressed concrete blocks mixed with the polymeric aluminum chloride waste residue

Influence of Polyaluminum Chloride Residue on the Strength and Microstructure of Cement-Based Materials

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