WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 83
·期 8
·2038-2050
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IF 1.915
Li Changyu,Sheng Yanqing
Vivianite crystallization is a promising route for phosphorus (P) recovery from P-rich wastewater. However, organic matter (OM) in wastewater may influence vivianite formation. In this study, the effects of four representative OMs, glucose, bovine serum albumin (BSA), humic acid (HA) and sodium alginate (SA), on P recovery by vivianite were investigated. The results showed that P recovery efficiency was inhibited by HA and SA, declining by 3.7% and 12.1% under HA (100 mg/L) and SA (800 mg/L), respectively. BSA, HA and SA affected the aggregated form of vivianite crystals. Vivianite particle size decreased in the presence of HA and SA. Subsequent mechanistic exploration indicated that the complexation between the OM and Fe 2+ was the main cause of P recovery efficiency reduction. The coprecipitation of HA and SA with vivianite could reduce the zeta potential on the crystal surface, resulting in a smaller particle size. The nucleation sites provided by BSA and SA could transfer vivianite from single plate-like agglomerate to multilayer plate-like agglomerate. This study provided a better understanding of P recovery by vivianite from OM-rich wastewater. Glucose, BSA, HA and SA affected vivianite crystallization from wastewater. OM might reduce P recovery rate by competition adsorption of Fe 2+ . The morphology of vivianite crystals were different under SA and BSA. Negative correlation presented between OM and Fe/P ratios during crystallization.
研究领域:
环境科学
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水处理技术
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材料科学
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DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2023
·Vol. 87
·期 11
·2634-2647
·
IF 2.7
Yu Rongzhen,Xiao Ya,Zhao Xiaojiao,Yao Pin,Yan Tinggui
View large Download slide View large Download slide Close modal Recovering phosphorus from incineration sludge sewage ash (ISSA) is a well-established technology, with a greater recovery potential than that of supernatant or sludge. ISSA can be utilized as a secondary raw material in the fertilizer industry, or as a fertilizer if heavy metal concentrations do not exceed permissible limits, thus reducing the cost of phosphorus recovery. Increasing the temperature to produce ISSA with higher solubility and plant availability of phosphorus is advantageous for both pathways. But a decrease in the extraction of phosphorus is also observed at high temperatures, thereby diminishing the overall economic benefits. In this study, CaCl 2 was utilized to mitigate the decrease in the extraction rate and also to promote the bioavailability of phosphorus. The addition of CaCl 2 (80 g/kg of dry sludge) effectively promoted the conversion of non-apatite inorganic phosphorus to apatite inorganic phosphorus at a rate of 87.73% at 750 °C. Furthermore, the decrease in the extraction rate of phosphorus at 1,050 °C was comparatively smaller in the presence of CaCl 2 . If iron flocculants are used to capture P in wastewater management, it may be necessary to pay special attention to the amount of addition and incineration temperature to maximize the economic potential of recycling. The decrease in the extraction of phosphorus at high temperatures is due to the enwrapping of some phosphorus-containing minerals by molten phases. The decrease in the extraction of phosphorus in sludge ash at high temperatures is mitigated by CaCl 2 . The acceptable conversion rate of apatite inorganic phosphorus (87%) can be achieved at 750 °C with a Ca/P ratio of 2.0.
研究领域:
环境科学
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资源回收
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DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Ying Wang,Haoyu Chen,Chao Chen,Zikun Zhang,Yin Xu,Guangjiao Chen,Yanlong Zhang
The anammox-HAP coupling process can simultaneously achieve high-efficiency nitrogen removal and phosphorus recovery from sewage. The composition and physical properties of the byproducts (aHAP) collected in the anammox-HAP process were analyzed. In addition, the application potential and mechanisms for Cd(II) adsorption by aHAP in wastewater were investigated. The results show that aHAP is mainly composed of hydroxyapatite and calcium carbonate , having granular structure with honeycombs and pores. The aHAP shows an adsorption capacity of 21.10–34.80 mg/g for Cd(II) removal, and the adsorption behavior is consistent with pseudo-second-order and intra-particle diffusion models, showing that the rate-limiting step is controlled by the chemical reaction of surface complexation, ion exchange, and precipitation. In addition, the remaining anammox biomass in aHAP can bind Cd(II). The aHAP also shows a pH buffer capacity when the initial pH ranges between 4.10 and 8.46, and the final pH can be stabilized in the range of 6.3 to 8.3, which is suitable for anammox reactions. Collectively, the anammox-HAP coupling process can not only be used to achieve high-efficiency nitrogen and phosphorus removal, but its aHAP byproduct shows good adsorption properties and pH buffering capacity, which meets the requirements of green chemistry and has high economic and environmental benefits.
研究领域:
环境科学
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污水处理
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Lin-Jiang Zhong,Shu-Jie Hu,Di Wu,Meng-Yue Zhang,Hong Liu,Yuan Liu
Both the sustainable development and environmental protection urge a demand of new paradigm to recover high-quality nutrients from source-separated urine, but the simultaneous recovery of phosphorus and nitrogen is difficult due to the complex composition. Herein, a coupled system consisting of a flow-electrode capacitive desalination and magnesium-air fuel cell (FCDI-MAFC) was proposed to accomplish electrochemical selective separation plus induced precipitation. The results showed that ionic species in urine were effectively separated from the non-ionic components to generate a urea solution with purity up to 99.7%. Ionic species were converted into artificial phosphate ores (APOs) with a phosphate content of 98.2%. The mass proportion of struvite in the APOs exceeded 90%. The energy consumption also decreased by 13% over five batches of operation. The overall results provide a novel method for the electrochemical selective separation and recovery of high-quality nutrients from complex wastewater.
研究领域:
环境科学
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资源回收
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电化学工程
✓ 已验证
DOI
高影响因子
HYDROMETALLURGY
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2024
·
IF 4.8
Qingfeng Zhou,Xiangdong Ma,Xunhui Xiong
This work proposes the roasting of amblygonite with calcium sulfate followed by water leaching to extract lithium and phosphorus. Various roasting parameters including roasting temperature, the mass ratio CaSO 4 /ore, roasting time as well as leaching parameters, such as the liquid/solid ratio, temperature and time, have been carefully investigated. The lithium extraction efficiency can be as high as 99.8% with a mass ratio of CaSO 4 /ore of 0.85 after roasting at 775 °C for 1 h and water leaching at a liquid/solid ratio of 3 mL/g at 100 °C for 2 h. The XRD analysis demonstrates that the fluoride in the amblygonite can be converted into Ca 5 (PO 4 ) 3 F and CaF 2 . Lithium in the leach liquor can be recovered as Li 2 CO 3 . Meanwhile, the phosphorus in the water leach residue can be recovered as FePO 4 with a high recovery of 96.6% after acid dissolution and precipitation, which can be further treated to produce LiFePO 4 .
研究领域:
矿物加工工程
·
无机化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yajing Zhang,Hui Wang,Zhaoyong Bian
Currently, using electrochemical precipitation techniques for phosphate removal and recovery in hydroxyapatite (HAP) or calcium phosphate (CaP) form is widely used, while the high energy consumption of electrochemical precipitation is a major obstacle to its application. In this study, a square wave pulsed electrochemical phosphate precipitation method was developed, which achieved phosphate pollution control and phosphate resource recovery and reuse at the same time. The square wave pulsed electrochemical phosphate recovery system was constructed and a Pt-rGO/CuF electrode was synthesized and evaluated. This result indicated that the Pt-rGO/CuF electrode had the highest electrocatalytic activity, the better electrical conductivity, and the smallest electron transport barrier. Under optimal operation conditions, the phosphate removal efficiency and specific energy consumption of Pt-rGO/CuF were 64.2% and 21.49 kWh kg −1 , respectively. The Pt-rGO/CuF electrode demonstrated the best electrochemical precipitation reaction performance. The Pt-rGO/CuF electrode was applied to multiple types of actual wastewater, and the results showed that it has better application prospects in both low (7.75 mg L −1 ) and high (66 mg L −1 ) phosphate concentration wastewater, the phosphate removal efficiency was 75.5% and 59.1%, respectively. Compared with traditional chemical precipitation , the electrochemical precipitation method saved $2.88 per kg P and $57.57 per kg P, respectively.
研究领域:
环境科学
·
电化学工程
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DOI
高影响因子
WATER RESEARCH
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2017
·
IF 6.942
Liping Fang,Ru Liu,Ji Li,Cuihong Xu,Li-Zhi Huang,Dongsheng Wang
An effective approach for eutrophication control and phosphate recovery remains a longstanding challenge. Herein, we present a new technique for phosphate sequestration in lake and phosphate recovery using novel magnetically recoverable magnetite/lanthanum hydroxide [M-La(OH) 3 ] hybrids that can be prepared using a simple one-pot synthesis method. Batch studies show that M-La(OH) 3 exhibits a strong sorption towards phosphate with sorption capacities of up to 52.7 mg-P/g at pH 7.0 in water. A simple model indicates that the efficiency of M-La(OH) 3 for phosphate sequestration in lake is significantly attenuated by 34–45% compared to that in water, due to interference from sediment particles. However, our results demonstrate that sediments suspensions mixed with a M-La(OH) 3 content of 1–3% exhibit a capability of up to 1.2 mg-P/g for sequestering external phosphate compared with that of 0.2 mg-P/g for pristine sediment at pH 7.3. M-La(OH) 3 -mixed sediment suspensions appear to effectively sequester phosphate over an environmentally relevant pH range from 4 to 8.5. Phosphorus (P) fractionation experiments indicate that the enhanced phosphate sorption by M-La(OH) 3 -mixed sediment suspensions is mainly due to the increased fractions of NaOH-P and inorganic P. This work indicates that the M-La(OH) 3 has the potential for phosphate sequestration and recovery from lake.
研究领域:
环境科学
·
水体富营养化控制
·
环境功能材料
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污染生态学
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资源回收
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chaosheng Zhu,Qinghe Niu,Di Liu,Jingli Wu,Yongjie Hao,Bo Jiang
To make up the gap of phosphorus emissions being too much as a contaminant and phosphorus being too little as a fertilizer resource, an energy-efficient electrochemically mediated precipitation-microfiltration (EMP-MF) system was rationally developed for P removal and recovery as calcium phosphate. In this system, the electrolysis cell was divided by a polytetrafluoroethylene (PTFE) membrane, allowing for the productions of acidic and alkaline effluents. The alkaline effluent was fed directly into the crystallizer for the precipitation of calcium phosphate crystals, which was well intercepted by the following Ti tubular microfilter. In this system, phosphorus recovery efficiency increased from 54 % to 90 % by elevating current density from 1 to 6 mA cm −2 , accompanying the specific energy consumption increasing from 3.92 to 22.44 kWh (kgP) -1 or from 0.039 to 0.38 kWh m −3 water treated. The phosphorus recovery efficiency by ECP-MF system was promoted at high initial solution pH. The phosphorus recovery efficiency was 67 %, 85 %, and 91 %, when initial solution pH was 4.0, 8.0 and 10.0. High initial Ca 2+ concentration favored the phosphorus recovery, whereas it was negatively influenced with the presence of HCO 3 – . In addition, the coexistence of magnesium had little effect on the recovery of phosphorus but inhibited the Ca 2+ removal. Natural organic matter could enhance the phosphorus recovery, but affected the purity of the recovered product. Generally, the established ECP-MF system exhibited significant prospect in promoting the widespread applications for phosphorus recovery from the wastewater.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Qiuwen Tong,Peng Cheng,Guangming Jiang,Yiming Li,Yali Wei,Yan Zou,Xiaoshu Lv,Liang Ao
Layered double hydroxide (LDH) represents an important class of adsorbents for phosphate (P) recovery from water, but the scale application remains challenged by the scarcity of LDH adsorbents with balanced adsorption capacity and settling performance. Herein we developed the three-dimensional Mg x Al 100-x -LDH microparticles (∼4 μm) with hierarchical flower-like structure and controlled compositions, which delivered fast P adsorption (equilibrium time < 5 min), large P adsorption capacities (108.8 mg g −1 by Mg 60 Al 40 -LDH) and better settling performances than the nanoscale LDH counterpart. The mechanistic study revealed that the robust adsorption performance of MgAl-LDH was attributed to the efficient anion exchange of P with the intercalated anions (Cl − and CO 3 2− ) in LDH. Owing to the exchangeability of intercalated P with the concentrated CO 3 2− in aqueous solution, we demonstrated that almost all the P adsorbed in LDH could be recovered in 1.0 M Na 2 CO 3 solution, and the cumulative P in solution could reach a concentration of 4.5 g/L after batches of recovery experiments. The Mg 60 Al 40 -LDH was further coupled with magnetic particles for P removal from natural lake water. The composite afforded high efficiencies in P removal and adsorbent separation from water (settling time: ∼10 min), but inadequate adsorption selectivity towards P especially in the presence of SO 4 2− and dissolved organic matters. This work is expected to provide a new platform for both the efficient P recovery and adsorbent collection from wastewater.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2017
·Vol. 24
·期 6
·5791-5799
·
IF 2.741
Dai Hongliang,Lu Xiwu,Peng Yonghong,Yang Zixuan,Zhsssu Huaqing
The HAP crystallization for phosphorus removal from wastewater contributes to an environmental friendly production due to the fact that it helps reduce or eliminate the water eutrophication as well as increases the recovery of mineral resources. However, the generated microcrystalline with poor settleability in high levels of supersaturation solution has a negative effect on the phosphorus recovery efficiency. To overcome the drawback, multiple reagent feed ports (four feed ports) and different recirculation ratio (1.0, 1.5, 2.0, 2.5, 3.0) were investigated to control the levels of supersaturation in an air-agitated reactor with calcite as seeds. Results showed that the approach of multiple reagent feed ports could improve the conversion ratio of orthophosphate, but it had a limited effect (∼3% improvement) on phosphorus recovery efficiency (deposition on the seeds). With the increase of the recirculation ratio, the recovery efficiency was increased gradually and reached an optimal value of 85.63% under the recirculation ratio of 2.5 and four feed ports. This is because the adopted strategies could reduce the level of supersaturation by diluting the concentration of the reagents and inhibit large numbers of microcrystalline coinstantaneous occurrence. Meanwhile, the crystallized products were detected and analyzed by scanning electron micrograph (SEM) with energy-dispersive spectrometry (EDS) and X-ray diffraction (XRD), which were proved to be HAP with a high purity. Collectively, these results demonstrated that supersaturation control using conventional approaches had a limited improvement on the phosphorus recovery efficiency in the form of HAP, and the new control strategies for supersaturation dispersion should be developed in the further study.
研究领域:
环境工程
·
化学工程
·
资源回收
·
水处理技术
·
结晶过程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Tian Tian,Ke Zhou,Yu-Sheng Li,Dong-Feng Liu,Han-Qing Yu
Phosphorus (P) recovery from wastewater can be completed by iron-involved autotrophic denitrification via forming Fe(III)–P precipitates and/or adsorbing P onto Fe(III) oxyhydroxides. However, so far, most studies focused on the final P-containing products, while the P-capturing pathways in such a process remain unclear. In this work, autotrophic iron-dependent denitrification (AIDD) was used as a typical anoxic iron-involved P-capturing biosystem to investigate the main P recovery pathways. The AIDD biosystem showed a relatively stable capability of capturing P coupled with nitrate reduction. Direct formation of amorphous Fe(II)–P precipitates after the phosphate was fed, followed by microbially driven oxidation into Fe(III)–P minerals, was found to be the primary pathway for the P capture. In addition, adsorption of phosphate onto the formed iron oxyhydroxides also contributed to the P recovery. This work provides better understanding about recovering P in AIDD and iron-involved denitrification and highlights the important roles of iron oxidizers in the iron-related biological wastewater treatment processes.
研究领域:
环境工程
·
水处理技术
·
生物地球化学
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环境微生物学
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资源回收
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yichen Zhang,Guozhong Shi,Weilong Wu,Amjad Ali,Hailong Wang,Quan Wang,Zhongyang Xu,Weidong Qi,Ronghua Li,Zengqiang Zhang
Amino hybrid biopolymer-decorated magnetic biochar composites (MTBC-2 N and MTBC-4 N) derived from green tea waste were synthesized and employed to recover phosphorus (P) from aqueous solution and swine wastewater, respectively. The amino hybrid biopolymer decoration decreased the surface area of the biochar composites but increased the nitrogen content of the MTBC-2 N and MTBC-4 N samples. The MTBC-2 N and MTBC-4 N remarkably promoted the dephosphorization of P-polluted waters than the raw biochar without amino hybrid biopolymer decoration. The kinetic adsorption of P onto MTBC-2 N and MTBC-4 N was simulated using the pseudo-second-order kinetic model and reached equilibrium within 4 h. The P adsorption isotherm was best fitted by the Langmuir model with the maximum adsorption capacities of 53.56 and 62.06 mg P/g for MTBC-2 N and MTBC-4 N, respectively. The tested MTBC-2 N and MTBC-4 N were regenerated and exhibited acceptable reusability. In addition, the adsorption of P onto MTBC-2 N and MTBC-4 N was regulated by electrostatic attraction and surface complexation processes. More than 88.2% and 96.5% of P were recovered by MTBC-2 N and MTBC-4 N from swine wastewater, respectively. Moreover, the pot experiment showed that the P-loaded biochar composites could potentially be used as alternative P fertilizers.
研究领域:
环境科学
·
材料科学
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农业科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）