151
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Mojoudi N, Soleimani M, Mirghaffari N, Belver C, Bedia J. Removal of phenol and phosphate from aqueous solutions using activated carbons prepared from oily sludge through physical and chemical activation. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 80:575-586. [PMID: 31596268 DOI: 10.2166/wst.2019.305] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Preparation and characterization of activated carbons (ACs) from oily sludge by physical and chemical activation using steam, ZnCl2 and FeCl3 were investigated. The characteristics of produced adsorbents were determined by iodine number, Brunauer-Emmett-Teller (BET) equation, Fourier transform infrared spectrometry and scanning electron microscopy analyses. Batch adsorption experiments for phenol and phosphate were performed to evaluate the efficiency of adsorbents. The optimum porous structure of adsorbents with a BET surface area of 1,259 m2 g-1, total pore volume of 1.22 cm3 g-1 and iodine number of 994 mg g-1 was achieved by ZnCl2 activation at 500 °C and impregnation ratio of 1:1. The adsorption data were well fitted to the pseudo-second-order kinetic model (R2>0.99) and Freundlich isotherm (R2>0.99). The maximum adsorption capacity of phenol (238 mg g-1) and phosphate (102 mg g-1) based on the Langmuir model was achieved at pH of 6.0 and adsorbent dose of 1 g L-1. Thermodynamic parameters were negative and showed that adsorption of phenol and phosphate onto the AC was feasible, spontaneous and exothermic. The results suggested that prepared AC was an effective adsorbent for removal of phenol and phosphate ions from the polluted water.
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Affiliation(s)
- Niloofar Mojoudi
- Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran E-mail:
| | - Mohsen Soleimani
- Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran E-mail:
| | - Nourollah Mirghaffari
- Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran E-mail:
| | - Carolina Belver
- Sección de Ingeniería Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Jorge Bedia
- Sección de Ingeniería Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
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152
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Phosphorus and Nitrogen Adsorption Capacities of Biochars Derived from Feedstocks at Different Pyrolysis Temperatures. WATER 2019. [DOI: 10.3390/w11081559] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This study investigates the P and NO3− adsorption capacities of different biochars made from plant waste including rice straw (RSB), Phragmites communis (PCB), sawdust (SDB), and egg shell (ESB) exposed to a range of pyrolysis temperatures (300, 500 and 700 °C). Results indicate that the effect of pyrolysis temperature on the physiochemical properties of biochar varied with feedstock material. Biochars derived from plant waste had limited adsorption or even released P and NO3−, but adsorption of P capacity could be improved by adjusting pyrolysis temperature. The maximum adsorption of P on RSB700, PCB300, and SDB300, produced at pyrolysis temperature of 700, 300 and 300 °C, was 5.41, 7.75 and 3.86 mg g−1, respectively. ESB can absorb both P and NO3−, and its adsorption capacity increased with an increase in pyrolysis temperature. The maximum NO3− and P adsorption for ESB700 was 1.43 and 6.08 mg g−1, respectively. The less negative charge and higher surface area of ESB enabled higher NO3− and P adsorption capacity. The P adsorption process on RSB, PCB, SDB and ESB, and the NO3− adsorption process on ESB were endothermic reactions. However, the NO3− adsorption process on RSB, PCB and SDB was exothermic. The study demonstrates that the use of egg shell biochar may be an effective way to remove, through adsorption, P and NO3− from wastewater.
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153
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Banu HT, Karthikeyan P, Meenakshi S. Zr 4+ ions embedded chitosan-soya bean husk activated bio-char composite beads for the recovery of nitrate and phosphate ions from aqueous solution. Int J Biol Macromol 2019; 130:573-583. [PMID: 30797805 DOI: 10.1016/j.ijbiomac.2019.02.100] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/22/2019] [Accepted: 02/16/2019] [Indexed: 11/15/2022]
Abstract
Removal of nitrate and phosphate ions using Zr4+ ions embedded chitosan-soya bean husk activated bio-char composite beads (Zr-CS-SAC) was carried out by batch mode to overcome the environmental problems due to eutrophication. The adsorbent was well characterized by using Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) analysis with energy dispersive X-ray analyzer (EDX), X-ray diffraction analysis (XRD), Brunauer-Emmett-Teller surface analyzer (BET), thermo-gravimetric analysis (TGA) and differential thermal analysis (DTA) etc. The adsorption equilibrium models of Langmuir, Freundlich and D-R isotherms were evaluated and the results described that the Freundlich model was the best for both the adsorbates of nitrate and phosphates ions with respective capacities of 90.09 and 131.29 mg g-1 at 30 °C. Studies on thermodynamic parameters revealed the endothermic and spontaneous nature of the adsorption. Different kinetic models were studied and found that pseudo-second-order kinetic data were well fitted for adsorption process. These results suggested that Zr-CS-SAC composite beads as a promising adsorbent for the removal of nitrate and phosphate ions from water with good removal efficiency, adsorbability, recyclability and non- toxicity.
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Affiliation(s)
- H Thagira Banu
- Department of Chemistry, The Gandhigram Rural Institute-Deemed to be University, Gandhigram 624 302, Tamil Nadu, India
| | - P Karthikeyan
- Department of Chemistry, The Gandhigram Rural Institute-Deemed to be University, Gandhigram 624 302, Tamil Nadu, India
| | - Sankaran Meenakshi
- Department of Chemistry, The Gandhigram Rural Institute-Deemed to be University, Gandhigram 624 302, Tamil Nadu, India.
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154
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Tang Q, Shi C, Shi W, Huang X, Ye Y, Jiang W, Kang J, Liu D, Ren Y, Li D. Preferable phosphate removal by nano-La(III) hydroxides modified mesoporous rice husk biochars: Role of the host pore structure and point of zero charge. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 662:511-520. [PMID: 30699371 DOI: 10.1016/j.scitotenv.2019.01.159] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/27/2018] [Accepted: 01/13/2019] [Indexed: 06/09/2023]
Abstract
Immobilizing La(OH)3 nanoparticles (NPs) to porous hosts has been widely applied to inhibiting their inherent aggregation as well as the subsequent low utilization efficiency of La. In this study, a series of rice husk biochars (RHBCs) with high mesoporous rates were prepared and the effects of host pore structure and point of zero charge (pHpzc) on phosphate adsorption by La-modified RHBCs was particularly focused. Characterization results confirmed that La(OH)3 NPs were both confined in the pore channel and external surface of RHBCs. Adsorption kinetics and isotherms showed that La-modified RHBCs with higher mesoporous rates of the host showed a faster adsorption rate and La-modified RHBCs exhibited superior La utilization efficiency than many reported La-incorporated adsorbents. Phosphate could be effectively captured over a wide pH of 3-10 due to the high pHpzc of La-modified RHBCs. Moreover, the La-modified RHBCs showed satisfactory affinity towards phosphate in the presence of coexisting anions and the phosphate adsorption by La-RHBC9 was enhanced in the presence of Ca2+, while it was inhibited in the presence of Mg2+. The mesoporous structure of RHBCs strengthened the stability of La-modified RHBCs and weakened the inhibition of coexisting humic substances on phosphate adsorption through the "shielding effect".
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Affiliation(s)
- Qian Tang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China
| | - Chenghao Shi
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China
| | - Wenmin Shi
- China Construction Third Bureau Green Industry Investment Co. Ltd, Wuhan, Hubei 430056, PR China
| | - Xueling Huang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China
| | - Yuanyao Ye
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China; Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Wei Jiang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China.
| | - Jianxiong Kang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China
| | - Dongqi Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China
| | - Yongzheng Ren
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China
| | - Daosheng Li
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, PR China
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155
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Wang L, Wang J, Wang Z, Feng J, Li S, Yan W. Synthesis of Ce-doped magnetic biochar for effective Sb(V) removal: Performance and mechanism. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.01.022] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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156
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Zhou R, Wang Y, Zhang M, Yu PX, Li J. Adsorptive removal of phosphate from aqueous solutions by thermally modified copper tailings. ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:198. [PMID: 30824988 DOI: 10.1007/s10661-019-7336-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
In this study, thermally modified copper tailings (TMCT) were used to adsorb phosphate in aqueous solutions through experiments. The characterization of TMCT and unmodified copper tailings (UMCT) was done by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The effects of pH, adsorbent dosage, contact time, and initial phosphate concentrations on phosphate adsorption were investigated. We studied the adsorption ability of TMCT and UMCT at 298 K, and the Langmuir isotherm model closely described the adsorption isotherm data, indicating that the maximum adsorption capacity (Qmax) of the TMCT and UMCT was 14.25 mg g-1 and 2.08 mg g-1, respectively. In addition, the adsorption isotherms of TMCT were analyzed at 288 K, 298 K, and 308 K, and the calculated Qmax of phosphate were 9.83 mg g-1 at 288 K, 14.25 mg g-1 at 298 K, and 11.55 mg g-1 at 308 K. Finally, the concentration of copper in the effluent was checked, and the content was 130 mg L-1. Then, the effluent was adsorbed by Eichhornia crassipes stem biochar; after adsorption, the concentration of the secondary effluent was 0.7 mg L-1, which is lower than the grade II classification (1.0 mg L-1) of the integrated wastewater discharge standard (GB8978-1996). The results suggest that the TMCT can be effectively and environmentally friendly used to adsorb phosphate from aqueous solutions.
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Affiliation(s)
- Runjuan Zhou
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.
- College of Electrical Engineering, Anhui Polytechnic University, 8 Middle Beijing Road, Wuhu, 241000, Anhui, People's Republic of China.
| | - Youbao Wang
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
| | - Ming Zhang
- College of Electrical Engineering, Anhui Polytechnic University, 8 Middle Beijing Road, Wuhu, 241000, Anhui, People's Republic of China
| | - Pei Xin Yu
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
| | - Jiyuan Li
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
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157
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Wu Y, Li X, Yang Q, Wang D, Xu Q, Yao F, Chen F, Tao Z, Huang X. Hydrated lanthanum oxide-modified diatomite as highly efficient adsorbent for low-concentration phosphate removal from secondary effluents. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 231:370-379. [PMID: 30368146 DOI: 10.1016/j.jenvman.2018.10.059] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 10/11/2018] [Accepted: 10/17/2018] [Indexed: 05/24/2023]
Abstract
The requirement to the phosphorus (P) emission from wastewater treatment plants (WWTPs) is becoming increasingly strict, which makes an advanced treatment for the low-concentration phosphate removal from secondary effluents indispensable. In present work, hydrated lanthanum (La) oxide-modified diatomite composites (La-diatomite) were fabricated by a facile method and employed as the highly efficient adsorbent for the low-concentration phosphate removal from simulating secondary effluents. Comparative experiments indicated that the La-diatomite treated by 0.1 mol/L LaCl3 exhibited the highest La availability (P/La molar ratio of 2.30) and performed good selectivity to phosphate adsorption even with the coexistence of competing anions and humic acid. The maximum P adsorption capacity reached to 58.7 mg P/g and the 96% P was removed quickly within 30 min at initial phosphate concentration 2 mg P/L. Insignificant La leaching was observed during the process due to the La stabilization by macroporous diatomite. Eight cycles of adsorption-desorption experiments revealed that the excellent repeated use property of La-diatomite. At the column test, La-diatomite showed superior treatment capacities of 3455 kg water/kg La-diatomite for simulated secondary effluents. The La-diatomite maintained high and stable adsorption effectiveness in wide pH range, which should be attributed to the synergistic effect of electrostatic interactions, ligand exchange and Lewis acid-based interaction. This work might provide a candidate for low-concentration phosphate removal from secondary effluent to alleviate the eutrophication.
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Affiliation(s)
- You Wu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Qiuxiang Xu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Fubing Yao
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Fei Chen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Ziletao Tao
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xiaoding Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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158
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de Carvalho Eufrásio Pinto M, David da Silva D, Amorim Gomes AL, Leite VDSA, Fialho e Moraes AR, Ferreira de Novais R, Tronto J, Pinto FG. Film based on magnesium impregnated biochar/cellulose acetate for phosphorus adsorption from aqueous solution. RSC Adv 2019; 9:5620-5627. [PMID: 35515895 PMCID: PMC9060768 DOI: 10.1039/c8ra06655h] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 01/25/2019] [Indexed: 11/21/2022] Open
Abstract
New hybrid film formed by biopolymer cellulose acetate and biochar for P adsorption in aqueous solution.
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Affiliation(s)
| | | | | | | | | | | | - Jairo Tronto
- Federal University of Viçosa
- Institute of Exact Science
- Campus de Rio Paranaíba
- Brazil
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159
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Li F, Meng F, Wang H, Ge B, Zhang Y, Yu C. Urea-modified grass ash activated sludge carbon: structure and adsorption properties towards H 2S and CH 3SH. NEW J CHEM 2019. [DOI: 10.1039/c9nj03836a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The deodorization structure of H2S and CH3SH adsorbed by sludge carbon was studied, and the deodorized product was analyzed.
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Affiliation(s)
- Fen Li
- School of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
| | - Fanzhu Meng
- School of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
| | - He Wang
- School of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
| | - Baocai Ge
- School of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
| | - Yanping Zhang
- School of Civil Engineering
- Hebei University of Technology
- Tianjin 300401
- China
| | - Cailian Yu
- School of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
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160
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Yi M, Chen Y. Enhanced phosphate adsorption on Ca-Mg-loaded biochar derived from tobacco stems. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 78:2427-2436. [PMID: 30699094 DOI: 10.2166/wst.2019.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Tobacco stems were used as precursors to prepare biochars (YGs) and develop Ca-Mg-loaded biochars (CMYGs) to enhance phosphate adsorption from aqueous solutions. Some influencing factors, such as pH, adsorption time, temperature, and structure characterization, were investigated. Fourier transform infrared (FTIR) spectra and X-ray diffraction (XRD) patterns showed several new peaks, indicating that Mg(OH)2 and MgO have been present on the surface of the CMYGs. The adsorption could reach equilibrium in 100 min reaction. The equilibrium data were well described by the Langmuir and Freundlich model. After five recycles, the phosphate removal capacity of CMYGs biochar retained over 50%. Moreover, the XRD and FTIR analyses showed that the phosphate sorption mechanisms involved surface electrostatic attraction, inner-sphere complexation and precipitation reactions. Overall, the soaking method could be used to effectively load Mg2+ onto the surface of YGs. The CMYGs synthesized at 750 °C is a promising adsorbent for phosphate removal with a high adsorption capacity for phosphate-polluted wastewater.
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Affiliation(s)
- Man Yi
- Chongqing Engineering Research Center of Rural Cleaning, Chongqing 400716, China and College of Resources & Environment, Southwest University, Chongqing 400715, China E-mail:
| | - Yucheng Chen
- Chongqing Engineering Research Center of Rural Cleaning, Chongqing 400716, China and College of Resources & Environment, Southwest University, Chongqing 400715, China E-mail:
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161
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Li R, Wang JJ, Zhang Z, Awasthi MK, Du D, Dang P, Huang Q, Zhang Y, Wang L. Recovery of phosphate and dissolved organic matter from aqueous solution using a novel CaO-MgO hybrid carbon composite and its feasibility in phosphorus recycling. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 642:526-536. [PMID: 29908511 DOI: 10.1016/j.scitotenv.2018.06.092] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 06/01/2018] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
Metal oxide-Carbon composites have been developed tailoring towards specific functionalities for removing pollutants from contaminated environmental systems. In this study, we synthesized a novel CaO-MgO hybrid carbon composite for removal of phosphate and humate by co-pyrolysis of dolomite and sawdust at various temperatures. Increasing of pyrolysis temperature to 900 °C generated a composite rich in carbon, CaO and MgO particles. Phosphate and humate can be removed efficiently by the synthesized composite with the initial solution in the range of pH 3.0-11.0. The phosphate adsorption was best fitted by pseudo-second-order kinetic model, while the humate adsorption followed the pseudo-second-order and the intra-particle diffusion kinetic models. The maximum adsorption capabilities quantified by the Langmuir isotherm model were up to 207 mg phosphorus (or 621 mg phosphate) and 469 mg humate per one-gram composite used, respectively. Characterization of composites after adsorption revealed the contributions of phosphate crystal deposition and electrostatic attraction on the phosphate uptake and involvement of π - π interaction in the humate adsorption. The prepared composite has great potential for recovering phosphorus from wastewater, and the phosphate sorbed composite can be employed as a promising phosphorus slow-releasing fertilizer for improving plant growth.
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Affiliation(s)
- Ronghua Li
- College of Environment and Natural Resources, Northwest A&F University, Yangling 712100, China; School of Plant, Environmental and Soil Sciences, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803, USA
| | - Jim J Wang
- School of Plant, Environmental and Soil Sciences, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803, USA.
| | - Zengqiang Zhang
- College of Environment and Natural Resources, Northwest A&F University, Yangling 712100, China
| | - Mukesh Kumar Awasthi
- College of Environment and Natural Resources, Northwest A&F University, Yangling 712100, China; Department of Biotechnology, Amicable Knowledge Solution University, Satna, India
| | - Dan Du
- College of Environment and Natural Resources, Northwest A&F University, Yangling 712100, China
| | - Pengfei Dang
- College of Environment and Natural Resources, Northwest A&F University, Yangling 712100, China
| | - Qian Huang
- College of Environment and Natural Resources, Northwest A&F University, Yangling 712100, China
| | - Yichen Zhang
- College of Environment and Natural Resources, Northwest A&F University, Yangling 712100, China
| | - Lu Wang
- College of Environment and Natural Resources, Northwest A&F University, Yangling 712100, China
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162
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Zhou Y, Zhang H, Cai L, Guo J, Wang Y, Ji L, Song W. Preparation and Characterization of Macroalgae Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability. MATERIALS 2018; 11:ma11091709. [PMID: 30217033 PMCID: PMC6163897 DOI: 10.3390/ma11091709] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 09/02/2018] [Accepted: 09/04/2018] [Indexed: 11/16/2022]
Abstract
In this study, carbonized kelp biochar (AKB) modified by KOH impregnation and photocatalytic Bi2MoO6/AKB composite (BKBC) nanomaterials were the first time successfully synthesized for efficient removal of dyes in aqueous solution. BET, XRD, FT-IR, and SEM were employed to characterize as-prepared samples. UV-vis and other test results indicated that the removal efficiency of methylene blue (MB) was 61.39% and 94.12% for BKBC and AKB, respectively, which was up to 13 times and 20 times higher in comparison with pure Bi2MoO6 (PBM). In addition, the equilibrium adsorption capacity of MB could reach up to 324.1 mg/g for AKB. This high dyes adsorption performance could be likely attributed to its high specific surface area (507.177 m2/g) and its abundant presence of various functional groups such as –OH and =C–H on AKB. Particularly, the existing of amorphous carbon and transition metal oxides, such as Fe2O3 and Mn5O8, could be beneficial for the photodegradation of MB for AKB. Meanwhile, experimental data indicated that adsorption kinetics complied with the pseudo-second order model well, and all of the tests had satisfactory results in terms of the highly efficient adsorption and photodegradation activity of AKB nanomaterials, which suggested its great potential in wastewater treatment.
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Affiliation(s)
- Yarui Zhou
- College of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China.
| | - Hailong Zhang
- Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan 316022, China.
| | - Lu Cai
- College of Environmental and Science Technology, Donghua University, Shanghai 201620, China.
| | - Jian Guo
- College of Food and Medical, Zhejiang Ocean University, Zhoushan 316022, China.
| | - Yaning Wang
- Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan 316022, China.
| | - Lili Ji
- Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan 316022, China.
| | - Wendong Song
- College of Petrochemical and Energy Engineering, Zhejiang Ocean University, Zhoushan 316022, China.
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163
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Liao T, Li T, Su X, Yu X, Song H, Zhu Y, Zhang Y. La(OH) 3-modified magnetic pineapple biochar as novel adsorbents for efficient phosphate removal. BIORESOURCE TECHNOLOGY 2018; 263:207-213. [PMID: 29747097 DOI: 10.1016/j.biortech.2018.04.108] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 04/24/2018] [Accepted: 04/27/2018] [Indexed: 05/24/2023]
Abstract
A series of La(OH)3-modified magnetic pineapple biochar (Lax-MC) with different contents of La(OH)3 were prepared and used as phosphate adsorbents for the first time. With the increase of La(OH)3 content, the adsorption capacity for phosphate increased while the magnetic property decreased. La10-MC exhibited excellent magnetic property for easy recovery and high adsorption capacity up to 101.16 mg P/g, which was 27 times that of pineapple biochar and much higher than most phosphate adsorbents. Adsorption isotherm and adsorption kinetics were better fitted by Langmuir model and pseudo second-order model, respectively. The removal efficiency >96.04% in coexisting ions indicated its high selectivity to phosphate. Little decrease in removal efficiency after three adsorption-desorption cycles suggested its excellent stability and cyclic utilization. Leaching study demonstrated the negligible risk of La3+ and Fe3+ leakage during adsorption process. Mechanism study revealed that the adsorption mechanism involved precipitation, electrostatic interaction, ligand exchange and inner-sphere complexation.
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Affiliation(s)
- Taiwan Liao
- Department of Chemistry, Jinan University, Guangzhou 510632, PR China
| | - Ting Li
- Department of Chemistry, Jinan University, Guangzhou 510632, PR China
| | - Xiangde Su
- Department of Chemistry, Jinan University, Guangzhou 510632, PR China
| | - Xiang Yu
- Analytical & Testing Center, Jinan University, Guangzhou 510632, PR China
| | - Huiyu Song
- Department of Chemistry, Jinan University, Guangzhou 510632, PR China
| | - Yi Zhu
- Department of Chemistry, Jinan University, Guangzhou 510632, PR China.
| | - Yuanming Zhang
- Department of Chemistry, Jinan University, Guangzhou 510632, PR China
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164
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Delgadillo-Velasco L, Hernández-Montoya V, Rangel-Vázquez NA, Cervantes FJ, Montes-Morán MA, Moreno-Virgen MDR. Screening of commercial sorbents for the removal of phosphates from water and modeling by molecular simulation. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.100] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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165
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Adsorption Behaviors and Removal Efficiencies of Inorganic, Polymeric and Organic Phosphates from Aqueous Solution on Biochar Derived from Sewage Sludge of Chemically Enhanced Primary Treatment Process. WATER 2018. [DOI: 10.3390/w10070869] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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166
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Recycling of Waste Sludge: Preparation and Application of Sludge-Based Activated Carbon. INT J POLYM SCI 2018. [DOI: 10.1155/2018/8320609] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
With the rapidly increasing industrial and agricultural development, a large amount of sludge has been produced from much water treatment. Sludge treatment has become one of the most important environmental issues. Resource utilization of sludge is one of the important efficient methods for solving this issue. Sludge-based activated carbon (SBAC) materials have high adsorption performance and can effectively remove environmental pollutants including typical organic matter and heavy metals through physical and chemical processes. Therefore, developing efficient SBAC materials is important and valuable. At present, preparation, modification, and application of SBAC materials have gained widespread attention. This paper provides a review of the research on SBAC preparation and modification and its utilization in removing environmental pollutants. It included the following topics present in this review: conventional and new methods for preparation of SBAC were clearly present; the effective methods for improving SBAC performance via physical and chemical modification were reviewed; and the correlation of their physic-chemical properties of SBAC with pollutants’ removal efficiencies as well as the removal mechanisms was revealed. SBAC has a better adsorption performance than commercial activated carbon in some aspects. Furthermore, it is a cost-effective technique and has a wide range of raw materials. However, there are still some drawbacks to its research; thus, some suggestions for further research were given in this review.
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167
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Razmi B, Ghasemi-Fasaei R. Investigation of Taguchi optimization, equilibrium isotherms, and kinetic modeling for phosphorus adsorption onto natural zeolite of clinoptilolite type. ADSORPT SCI TECHNOL 2018. [DOI: 10.1177/0263617418779738] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Adsorption process plays an important role in the removal of phosphorus from aqueous solutions. A laboratory experiment was conducted to investigate the adsorption characteristics of phosphorus onto natural zeolite and to find out the relative importance of some controllable treatments in phosphorus adsorption process using the Taguchi optimization methodology. Results showed that the adsorption of phosphorus in the presence of Fe3+ and Al3+ was higher than that in the absence of these two cations probably due to the adsorption of phosphorus-bearing anions on opposite charges of these cations. Also, increase in contact time tended phosphorus adsorption to be increased. The addition of base and acid treatments caused an increase and a decrease, respectively, on phosphorus adsorption. The order of effectiveness of treatments on the values of phosphorus adsorption was as follows: acid/base treatment >sorbent to sorbate ratio > modification with aluminium (Al)/iron (Fe) >contact time >phosphorus concentration. Phosphorus adsorption data well fitted to the Freundlich isotherm model. The pseudo-second order was the best model describing phosphorus adsorption kinetics. According to the results reported herein, it is assumed that the main mechanism controlling phosphorus adsorption onto natural zeolite is chemisorption.
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Affiliation(s)
- Bahareh Razmi
- Department of Soil Science, College of Agriculture, Shiraz University, Iran
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168
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Zhou R, Wang Y, Zhang M, Li J, Gui Y, Tang Y, Yu B, Yang Y. Effect of heating temperature and time on the phosphate adsorption capacity of thermally modified copper tailings. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 77:2668-2676. [PMID: 29944131 DOI: 10.2166/wst.2018.230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present study, copper tailings were treated at different temperatures (50-650 °C) and for various times (0.5-6 hours) and their phosphate adsorption capacity was investigated. The results showed that heating temperature significantly affected adsorption capacity. The highest capacity was observed in treatments at 310-350 °C. Heating time did not influence phosphate adsorption ability of copper tailings. Scanning electron microscopy, Barrett-Joyner-Halenda (BJH), and Fourier transform infrared spectroscopy (FTIR) were employed to characterize untreated copper tailings (raw CT) and copper tailings heated at 340 °C (CT340). The results showed that CT340 had a rougher surface, more and smaller pores, a larger surface area and higher FTIR transmittance than raw CT. These changes in texture might explain the increased phosphate adsorption of thermally modified copper tailings. Mathematical modeling showed that the Langmuir nonlinear model was the best fit to the current data. The maximum adsorption capacities of raw CT and CT340 were predicted as 2.08 mg/g and 14.25 mg/g at 298 K, pH 6.0, respectively.
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Affiliation(s)
- Runjuan Zhou
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China E-mail: ; College of Electrical Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Youbao Wang
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China E-mail:
| | - Ming Zhang
- College of Electrical Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Jing Li
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China E-mail:
| | - Yanan Gui
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China E-mail:
| | - Yingying Tang
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China E-mail:
| | - Beixin Yu
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China E-mail:
| | - Yaru Yang
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China E-mail:
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