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Ibrahim NH, Taha GM, Hagaggi NSA, Moghazy MA. Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals. BMC Chem 2024; 18:7. [PMID: 38184656 PMCID: PMC10771699 DOI: 10.1186/s13065-023-01105-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 12/12/2023] [Indexed: 01/08/2024] Open
Abstract
This study marks a pioneering effort in utilizing Vachellia tortilis subsp. raddiana (Savi) Kyal. & Boatwr., (commonly known as acacia raddiana) leaves as both a reducing and stabilizing agent in the green "eco-friendly" synthesis of silver nanoparticles (AgNPs). The research aimed to optimize the AgNPs synthesis process by investigating the influence of pH, temperature, extract volume, and contact time on both the reaction rate and the resulting AgNPs' morphology as well as discuss the potential of AgNPs in detecting some heavy metals. Various characterization methods, such as UV-vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (IR), Zeta sizer, EDAX, and transmitting electron microscopy (TEM), were used to thoroughly analyze the properties of the synthesized AgNPs. The XRD results verified the successful production of AgNPs with a crystallite size between 20 to 30 nm. SEM and TEM analyses revealed that the AgNPs are primarily spherical and rod-shaped, with sizes ranging from 8 to 41 nm. Significantly, the synthesis rate of AgNPs was notably higher in basic conditions (pH 10) at 70 °C. These results underscore the effectiveness of acacia raddiana as a source for sustainable AgNPs synthesis. The study also examined the AgNPs' ability to detect various heavy metal ions colorimetrically, including Hg2+, Cu2+, Pb2+, and Co2+. UV-Vis spectroscopy proved useful for this purpose. The color of AgNPs shifts from brownish-yellow to pale yellow, colorless, pale red, and reddish yellow when detecting Cu2+, Hg2+, Co2+, and Pb2+ ions, respectively. This change results in an alteration of the AgNPs' absorbance band, vanishing with Hg2+ and shifting from 423 to 352 nm, 438 nm, and 429 nm for Cu2+, Co2+, and Pb2+ ions, respectively. The AgNPs showed high sensitivity, with detection limits of 1.322 × 10-5 M, 1.37 × 10-7 M, 1.63 × 10-5 M, and 1.34 × 10-4 M for Hg2+, Cu2+, Pb2+, and Co2+, respectively. This study highlights the potential of using acacia raddiana for the eco-friendly synthesis of AgNPs and their effectiveness as environmental sensors for heavy metals, showcasing strong capabilities in colorimetric detection.
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Affiliation(s)
- Nesma H Ibrahim
- Environmental Applications of Nanomaterial's Lab., Department of Chemistry, Faculty of Science, Aswan University, Aswan, 81528, Egypt
| | - Gharib M Taha
- Environmental Applications of Nanomaterial's Lab., Department of Chemistry, Faculty of Science, Aswan University, Aswan, 81528, Egypt
| | - Noura Sh A Hagaggi
- Botany Department, Faculty of Science, Aswan University, Aswan, 81528, Egypt
| | - Marwa A Moghazy
- Environmental Applications of Nanomaterial's Lab., Department of Chemistry, Faculty of Science, Aswan University, Aswan, 81528, Egypt.
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Belebchouche C, Bensebti SE, Ould-Said C, Moussaceb K, Czarnecki S, Sadowski L. Stabilization of Chromium Waste by Solidification into Cement Composites. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6295. [PMID: 37763572 PMCID: PMC10533120 DOI: 10.3390/ma16186295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/04/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023]
Abstract
This article deals with the study of hazardous chromium leaching, stabilized/solidified by cement CEM II after 28 days of curing, in an acidic environment. The mortars subjected to this study were investigated by X-ray diffraction (XRD) characterization to evaluate the influence of chromium waste on their mineralogical structure. In the study range (0.6-1.2%), increasing the mass percentage of Cr2O3 in the mortars indicates that chromium accelerates the hydration process and setting of the mortar and increases the mechanical strength of the mortars compared to the control sample. It was observed that the release of chromium during the Toxicity Characteristic Leaching Procedure (TCLP) test and the efficiency of the stabilization/solidification process depended on the initial Cr concentration and the leaching time. The use of XRD allowed the identification of new crystallized phases in the cement matrices, namely, CaCrO4·2H2O and chromium-ettringite Ca6Cr2(SO4)3(OH)12·26H2O, which confirms the immobilization of chromium and the efficiency of the stabilization/solidification process. In this research, the release mechanism was found to be primarily a surface phenomenon by modeling the experimental data (dissolution or precipitation).
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Affiliation(s)
- Cherif Belebchouche
- Department of Civil Engineering, Faculty of Sciences of Technology, Frères Mentouri Constantine 1 University, Constantine 25000, Algeria;
- Materials and Durability of Constructions Laboratory, Faculty of Sciences of Technology, Frères Mentouri Constantine 1 University, Constantine 25000, Algeria
- Laboratory of Materials Technology and Process Engineering, Faculty of Technology, University of Bejaia, Bejaia 06000, Algeria
| | - Salah-Eddine Bensebti
- Department of Civil Engineering, Faculty of Sciences of Technology, Frères Mentouri Constantine 1 University, Constantine 25000, Algeria;
- Materials and Durability of Constructions Laboratory, Faculty of Sciences of Technology, Frères Mentouri Constantine 1 University, Constantine 25000, Algeria
| | - Chaima Ould-Said
- Laboratory of Biology and Physiology of Organisms (LBPO), Faculty of Biological Sciences, USTHB, BP 32 El-Alia, Bab Ezzouar 16111, Algeria;
| | - Karim Moussaceb
- Laboratory of Materials Technology and Process Engineering, Faculty of Technology, University of Bejaia, Bejaia 06000, Algeria
| | - Slawomir Czarnecki
- Department of Materials Engineering and Construction Processes, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland;
| | - Lukasz Sadowski
- Department of Materials Engineering and Construction Processes, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland;
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Zhu Z, Jiang H, Zhu Y, Zhang L, Tang S, Zhou X, Fan Y. Strontium-doped hydroxyapatite as adsorbent effectively to remove lead ions from water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:81063-81075. [PMID: 35729392 DOI: 10.1007/s11356-022-21564-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
In this study, a strontium-doped hydroxyapatite (Sr-HAP) was synthesized by the solgel method, which was used as adsorbent to remove lead ions (Pb2+) from water. The results showed that the adsorption capacities of the Sr-HAP were obviously higher than those of the HAP, the adsorption capacities of which for Pb2+ reached 651.175 mg/g. The proper increasement in the dosage of adsorbent was beneficial to the removal of Pb2+ by Sr-HAP. Meanwhile Sr-HAP had a wide applicable pH range for Pb2+. And the increasement in temperature could increase the adsorption capacity of Sr-HAP for Pb2+ to a certain extent. The Langmuir model was used to fit the isotherm adsorption process of Sr-HAP to Pb2+ in water. Compared with HAP, the specific surface area of Sr-HAP has increased by 11.1%, and the pore size distribution of Sr-HAP tended to be smaller and more uniform. Hence, Sr-HAP could be used as an ideal adsorbent to remove Pb2+ in wastewater.
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Affiliation(s)
- Zongqiang Zhu
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China
- The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China
- Technical Innovation Center of Mine Geological Environmental Restoration Engineering in Southern Karst Area, Nanning, 530022, China
| | - Huiling Jiang
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China
- The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China
| | - Yinian Zhu
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China
- The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China
| | - Lihao Zhang
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China
- The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China
| | - Shen Tang
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China
- The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China
| | - Xiaobin Zhou
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China
- The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China
| | - Yinming Fan
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China.
- The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China.
- School of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541000, People's Republic of China.
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Timalsina H, Gyawali T, Ghimire S, Paudel SR. Potential application of enhanced phytoremediation for heavy metals treatment in Nepal. CHEMOSPHERE 2022; 306:135581. [PMID: 35798158 DOI: 10.1016/j.chemosphere.2022.135581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/20/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
Heavy metals contamination in soil and water resources is a great threat to developing countries because of the lack of waste treatment facilities. A majority of wastewater treatment methods are known to be expensive and out of reach for municipalities and small pollution treatment enterprises. Phytotechnology is a promising, sustainable, environment-friendly, and cost-effective technique for domestic and industrial wastewater treatment in places where land is available. However, interest in conventional remediation methods and the lack of information on recent advances in a significant portion of the society in developing countries have restrained the applications of phytoremediation. This review discusses the concept of phytoremediation, mechanisms of heavy metals removal by plants, and the potential application of enhanced phytoremediation technologies in developing countries like Nepal. The authors also review the commercially viable hyperaccumulator species with their native distribution, heavy metals intake capacity, and their availability in Nepal. Those native plants can be utilized locally or introduced strategically in other parts/countries as well. Thus, for a flora-rich country like Nepal, this study holds great potential and presents enhanced phytoremediation as an effective and sustainable strategy for the future.
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Affiliation(s)
- Haribansha Timalsina
- Department of Civil Engineering, Pulchowk Campus, Institute of Engineering, Tribhuvan University, Pulchowk, Lalitpur, 44700, Nepal; Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, USA
| | - Tunisha Gyawali
- Department of Civil Engineering, Pulchowk Campus, Institute of Engineering, Tribhuvan University, Pulchowk, Lalitpur, 44700, Nepal
| | - Swastik Ghimire
- Department of Civil Engineering, Pulchowk Campus, Institute of Engineering, Tribhuvan University, Pulchowk, Lalitpur, 44700, Nepal
| | - Shukra Raj Paudel
- Department of Civil Engineering, Pulchowk Campus, Institute of Engineering, Tribhuvan University, Pulchowk, Lalitpur, 44700, Nepal; Department of Environmental Engineering, College of Science and Technology, Korea University, Sejong, Republic of Korea.
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Perveen S, Parveen A, Saeed M, Arshad R, Zafar S. Interactive effect of glycine, alanine, and calcium nitrate Ca(NO 3) 2 on wheat (Triticum aestivum L.) under lead (Pb) stress. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:37954-37968. [PMID: 35075561 DOI: 10.1007/s11356-021-17348-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 10/29/2021] [Indexed: 06/14/2023]
Abstract
Aim of this study was to evaluate the interactive effects of glycine, alanine, calcium nitrate [Ca(NO3)2], and their mixture on the growth of two wheat (Triticum aestivum L.) varieties, i.e., var. Punjab-2011 and var. Anaj-2017 under lead [0.5 mM Pb(NO3)2] stress. A pot experiment was conducted for this purpose. Pre-sowing seed treatment with 1 mM glycine, alanine, and calcium nitrate [Ca(NO3)2] was applied under two levels of lead nitrate [Pb(NO3)2] stress, i.e., control and 0.5 mM Pb(NO3)2. Lead (0.5 mM) stress significantly decreased root and shoot lengths, fresh and dry weights of root and shoot, and chlorophyll contents, while it increased activities of antioxidant enzymes such as catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), and peroxidase (POD) in both wheat varieties. Lead (0.5 mM) stress increased the accumulation of free proline, glycinebetaine, total free amino acids, and total soluble protein contents. Although var. Punjab-2011 was higher in root fresh and dry weights, shoot length, and total leaf area per plant, however, var. Anaj-2017 showed less reduction in shoot dry weight, root fresh weight, and shoot length under lead stress. Under lead stress, Punjab-2011 was higher in grain yield and number of grain plant-1, chlorophyll a contents, membrane permeability (%), POD activity, total free amino acids, and glycinebetaine (GB) contents as compared to Anaj-2017. Pre-sowing seed treatments with glycine, alanine, calcium nitrate, and their mixture (1 mM of each) increased shoot dry weight, number of grains per plants, 100-grain weight, number of spikes, and chlorophyll a contents under normal and lead-stressed conditions. Wheat var. Anaj-2017 showed higher growth and yield attributes as compared to var. Punjab-2011. Results of the current study have shown that pre-sowing seed treatments with glycine, alanine, calcium nitrate, and their mixture (1 mM of each) can overcome the harmful effects of lead (Pb) stress in wheat plants.
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Affiliation(s)
- Shagufta Perveen
- Department of Botany, Government College University, Faisalabad, 38000, Pakistan.
| | - Abida Parveen
- Department of Botany, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Saeed
- Department of Botany, Government College University, Faisalabad, 38000, Pakistan
| | - Rabia Arshad
- Department of Botany, Government College University, Faisalabad, 38000, Pakistan
| | - Sara Zafar
- Department of Botany, Government College University, Faisalabad, 38000, Pakistan
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Tangahu BV, Sheikh Abdullah SR, Basri H, Idris M, Anuar N, Mukhlisin M. Lead (Pb) removal from contaminated water using constructed wetland planted with Scirpus grossus: Optimization using response surface methodology (RSM) and assessment of rhizobacterial addition. CHEMOSPHERE 2022; 291:132952. [PMID: 34798103 DOI: 10.1016/j.chemosphere.2021.132952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/10/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
Lead (Pb) is one of the toxic heavy metals that pollute the environment as a result of industrial activities. This study aims to optimize Pb removal from water by using horizontal free surface flow constructed wetland (HFSFCW) planted with Scirpus grossus. Optimization was conducted using response surface methodology (RSM) under Box-Behnken design with the operational parameters of initial Pb concentration, retention time, and aeration. Optimization results showed that 37 mg/L of initial Pb concentration, 32 days of retention time, and no aeration were the optimum conditions for Pb removal by using the systems. Validation test was run under two different conditions, namely, non-bioaugmented and bioaugmented with rhizobacteria (Bacillus cereus, B. pumilus, B. subtilis, Brevibacillus choshinensis, and Rhodococcus rhodochrous). Results of the validation test showed that Pb removal in water achieved 99.99% efficiency with 0.2% error from the RSM prediction, while the adsorption of Pb by plants reached 5160.18 mg/kg with 10.6% error from the RSM prediction. The bioaugmentation of the five rhizobacterial species showed a slight improvement in Pb removal from water and Pb adsorption by plants. However, no significant improvement was achieved (p < 0.05). Overall results suggested that operating the HFSFCW under optimum conditions with no bioaugmentation might be a feasible choice for the treatment of Pb-contaminated water.
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Affiliation(s)
- Bieby Voijant Tangahu
- Department of Environmental Engineering, Faculty of Civil, Planning, and Geo Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS, Sukolilo, Surabaya, 60111, Indonesia.
| | - Siti Rozaimah Sheikh Abdullah
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM, Bangi, Selangor, Malaysia.
| | - Hassan Basri
- Department of Civil and Structural Engineering, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM, Bangi, Malaysia
| | - Mushrifah Idris
- Tasik Chini Research Center, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM, Bangi, Malaysia
| | - Nurina Anuar
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM, Bangi, Selangor, Malaysia
| | - Muhammad Mukhlisin
- Department of Civil Engineering, Politeknik Negeri Semarang, 50275, Semarang, Indonesia
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Moreno-Torres JA, Flores-Acosta M, Ramírez-Bon R, Coutino-Gonzalez E. Lead confinement and fluorimetric detection using zeolites: towards a rapid and cost-effective detection of lead in water. JPHYS PHOTONICS 2021. [DOI: 10.1088/2515-7647/abf945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract
Metal clusters stabilized in zeolites have emerged as promising candidates for optoelectronic applications due to their remarkable luminescent properties. These optical properties have been exploited to develop fast and highly sensitive methods for optical sensing in environmental monitoring. However, to date, these materials have not been proposed as a detection method based on their luminescent response for sensing toxic metal ions. In this report, we synthesized luminescent lead (Pb) clusters into the cavities of synthetic F9-NaX zeolites, which were used as scaffolds to confine and detect Pb2+ ions in water through a fluorimetric mode. These Pb-F9 samples display an intense cyan emission in dehydrated form. Also, a correlation between the luminescence intensity of the materials and the lead loadings was observed, obtaining a low limit of detection of 1.248 ppb and a limit of quantification of 3.782 ppb. The results clearly demonstrate the potential of luminescent lead-exchanged F9 zeolites as one-step method for lead monitoring in water using a rapid and low-cost strategy.
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Liu K, Marin L, Xiao L, Cheng X. Fluorescent multi-component polymer sensors for the sensitive and selective detection of Hg 2+/Hg + ions via dual mode fluorescence and colorimetry. NEW J CHEM 2021. [DOI: 10.1039/d1nj04286f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Fluorescent multi-component polymers, which are sensitive and selective to Hg2+/Hg+ through fluorescence and colorimetry, were synthesized by the Heck coupling reaction.
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Affiliation(s)
- Kaiqi Liu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430073, China
| | - Luminita Marin
- Petru Poni’’ Institute of Macromolecular Chemistry of Romanian Academy, Iasi, Romania
| | - Li Xiao
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430073, China
| | - Xinjian Cheng
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430073, China
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Park BH, Kim S, Seo AY, Lee TG. Evaluation of optimal conditions for anionic surfactant removal in wastewater. CHEMOSPHERE 2021; 263:128174. [PMID: 33297142 DOI: 10.1016/j.chemosphere.2020.128174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/25/2020] [Accepted: 08/26/2020] [Indexed: 06/12/2023]
Abstract
This study was conducted to find the optimal conditions for removing anionic surfactants in wastewater using the coagulant-flocculant method. Optimal conditions must be found to minimize the amount of metal materials that can cause secondary contamination and to improve performance. Five parameters were selected to investigate their influence on surfactant removal. The ranges of the independent variables were 0.5-5% for coagulant concentration, 0.1-1% for flocculant concentration, and 20-650 mg/L for surfactant concentration; the coagulant type was FeCl3·6H2O or Ca(OH)2; and the pH ranged from 2 to 10. The experimental results were analyzed with Minitab 19.1 to find the optimal conditions to maximize the removal rate of surfactant. In this study, a total of 20 experiments were carried out using a half fractional factorial design (FFD) including two center points with a resolution of 5 and a pseudo-center point. The results demonstrated that coagulant concentration, flocculant concentration, and pH were significant independent variables with respect to surfactant removal. The fitted regression equation confirmed that the surfactant removal rate was maximized when the coagulant concentration was 5%, the flocculant concentration was 0.1%, and the pH was 10.
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Affiliation(s)
- Byung Hun Park
- Department of Industrial Engineering, Sungkyunkwan University, 2066, Seobu-Ro, Jangan-Gu, Suwon-si, Gyeonggi-do, Republic of Korea.
| | - Sehui Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
| | - A Young Seo
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
| | - Tai Gyu Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
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Wang W, Li D, Liu X. From aliphatic compounds contaminated soil to active building material: An emerging opportunity for soil remediation and waste utilisation. ENVIRONMENTAL RESEARCH 2020; 190:109986. [PMID: 32777277 DOI: 10.1016/j.envres.2020.109986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/15/2020] [Accepted: 07/19/2020] [Indexed: 06/11/2023]
Abstract
Soil contaminated with the production wastewater of 4,4'-diaminostilbene-2,2'-disulfonic acid is extremely hazardous and difficult to bioremediate. In this study, a cost-effective method was developed to reduce the risk of contaminated soil and produce building materials through a combination of ultrasonic processing and solidification/stabilisation. Ultrasonic processing conditions of 5 min at 40 kHz were found to significantly improve the compressive strength of bricks. The results of scanning electron microscopy, X-ray diffraction, and thermogravimetric analysis demonstrated that the enhanced strength was due to the ultrasonic processing controlling the shape and scale of the crystals and microstructure of the cement paste. Furthermore, the effect of the activating agent, CaO, on the leaching toxicity of the bricks was closely related to the curing temperature. Under natural dry conditions (10-25 °C), the leaching toxicity decreased along with the reduction of CaO. However, under high artificial temperature conditions (40 °C), increasing the CaO was beneficial for decreasing the leaching toxicity. The addition of 2.91% CaO was suitable for improving brick performance under both natural dry (10-25 °C) and artificial temperature curing conditions (40 °C). The results of GC-MS revealed that 64.8% and 66.7% of organic species and organic volume, respectively, were reduced in the leachate of the bricks, which was produced by CaO activation and ultrasonic treatments. It was demonstrated that the optimal combined process for cost-effectively transforming hazardous soil to active building materials is feasible.
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Affiliation(s)
- Wenbing Wang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
| | - Deping Li
- School of China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Xuntao Liu
- School of Accountancy, Hubei University of Economics, Hubei, 430205, PR China.
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Li Q, Zhong H, Cao Y. Effective extraction and recovery of rare earth elements (REEs) in contaminated soils using a reusable biosurfactant. CHEMOSPHERE 2020; 256:127070. [PMID: 32428739 DOI: 10.1016/j.chemosphere.2020.127070] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/10/2020] [Accepted: 05/12/2020] [Indexed: 06/11/2023]
Abstract
Tea saponin (TS), a plant derived biosurfactant, was used to investigate on its effectiveness on the extraction of three typically selected rare earth elements (REEs, light lanthanum (La), medium arrowhead (Dy) and heavy erbium (Er)) from contaminated soils, in the presence of important toxic heavy metals (lead (Pb) and cadmium (Cd)). A complete procedure, involving the extraction of REEs in soils, the recovery of REEs and TS in the extraction leachates and the reuse of the recovered TS, was established. Experimental results showed that the optimal extraction parameters were consumption of 1.2 g/g (TS/soil), pH of 5 and the extraction time of 24 h. The recovery efficiencies of La, Dy, Er, Cd and Pb achieved 96.9%, 88%, 84.3%, 88% and 91.1% using 0.3 g/g (Ca(OH)2/soil). The overall extraction efficiencies of La, Dy, Er, Cd and Pb were 53.9%, 73.2%, 71.7%, 95.9% and 38.8% by three times using the recovered TS solution. The extractable fractions of La, Dy, Er, Cd and Pb in soil were found to be highest in their acid soluble and reducible forms. Mechanisms studies indicated the increased binding strength (IR) and the decreased mobility (MF) of REEs and metals after the flushing with TS. Carboxyl groups in TS were attributed to the formation of complexation and agglomeration between TS and studied REEs and other metals, confirmed by the analysis of both the X-ray photoelectron spectroscopy (XPS) and the dynamic light scattering (DLS). This study established an environmentally-friendly contaminated soil remediation and the recovery of valuable REEs by the combination use of TS and calcium hydroxide.
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Affiliation(s)
- Qiqi Li
- College of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, China
| | - Huiqiong Zhong
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China
| | - Yan Cao
- College of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, China.
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Chalkidis A, Jampaiah D, Aryana A, Wood CD, Hartley PG, Sabri YM, Bhargava SK. Mercury-bearing wastes: Sources, policies and treatment technologies for mercury recovery and safe disposal. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 270:110945. [PMID: 32721358 DOI: 10.1016/j.jenvman.2020.110945] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/03/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
Due to the lenient environmental policies in developing economies, mercury-containing wastes are partly produced as a result of the employment of mercury in manufacturing and consumer products. Worldwide, the presence of mercury as an impurity in several industrial processes leads to significant amounts of contaminated waste. The Minamata Convention on Mercury dictates that mercury-containing wastes should be handled in an environmentally sound way according to the Basel Convention Technical Guidelines. Nevertheless, the management policies differ a great deal from one country to another because only a few deploy or can afford to deploy the required technology and facilities. In general, elemental mercury and mercury-bearing wastes should be stabilized and solidified before they are disposed of or permanently stored in specially engineered landfills and facilities, respectively. Prior to physicochemical treatment and depending on mercury's concentration, the contaminated waste may be thermally or chemically processed to reduce mercury's content to an acceptable level. The suitability of the treated waste for final disposal is then assessed by the application of standard leaching tests whose capacity to evaluate its long-term behavior is rather questionable. This review critically discusses the main methods employed for the recovery of mercury and the treatment of contaminated waste by analyzing representative examples from the industry. Furthermore, it gives a complete overview of all relevant issues by presenting the sources of mercury-bearing wastes, explaining the problems associated with the operation of conventional discharging facilities and providing an insight of the disposal policies adopted in selected geographical regions.
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Affiliation(s)
- Anastasios Chalkidis
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia; Energy Business Unit, Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton South, VIC 3169, Australia
| | - Deshetti Jampaiah
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia.
| | - Amir Aryana
- Energy Business Unit, Commonwealth Scientific and Industrial Research Organization (CSIRO), North Ryde, NSW 1670, Australia
| | - Colin D Wood
- Australian Resources Research Centre, Commonwealth Scientific and Industrial Research Organization (CSIRO), Kensington, WA 6152, Australia; Curtin Oil and Gas Innovation Centre (CUOGIC), Curtin University, Kensington, WA 6152, Australia
| | - Patrick G Hartley
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia; Energy Business Unit, Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton South, VIC 3169, Australia
| | - Ylias M Sabri
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia
| | - Suresh K Bhargava
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia.
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13
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Li Q, Zhong H, Cao Y. Effects of the joint application of phosphate rock, ferric nitrate and plant ash on the immobility of As, Pb and Cd in soils. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 265:110576. [PMID: 32421564 DOI: 10.1016/j.jenvman.2020.110576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 04/03/2020] [Accepted: 04/05/2020] [Indexed: 06/11/2023]
Abstract
Phosphate rock (PR) and ferric salts have been frequently used to immobilize heavy metal(loid)s in soils, but in varied efficiencies referring to different metal(loid) pollutants. This study explored the effective application of plant ash (PA) to the previous formula of phosphate rock (PR) and ferric salts (Fe(NO3)3) (PR + Fe3++PA), compared to only PR, on the bioavailability and immobility of multi-metal(loid)s of selected arsenic (As), lead (Pb) and cadmium (Cd) in soils. Results from NaHCO3- extraction and toxicity characteristic leaching procedure (TCLP) implied the increase of the As mobility in soils by 7.0% and 2.6% using PR only, but the significant reduction of the As mobility by 24.2% and 82.4% jointly using PR + Fe3++PA. Meanwhile, the application of either PR alone or PR + Fe3++PA in soil significantly decreased Pb and Cd extracting in diethylene triamine pentacetate acid (DTPA) and TCLP, particularly, the immobilization effect of PR + Fe3++PA was better than that of PR. The leaching column test further confirmed the high durability of PR + Fe3++PA on the immobilization of As and Pb under the continuous acid exposure, but likely slightly increased the mobility of Cd (the accumulated concentration of Cd, 5.88 μg/L) compared to that (3.16 μg/L) in the untreated column (UN-column), which were both much lower than the level V (100 μg/L) of the Chinese National Quality Standard for Surface Water (GB 3838-2002). Therefore, PR + Fe3++PA exhibited the significant enhancement on the immobilization of As, Pb and Cd under simulated acid rain (SAR) leaching.
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Affiliation(s)
- Qiqi Li
- College of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, China
| | - Huiqiong Zhong
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China
| | - Yan Cao
- College of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, China.
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14
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Removal of Hg(II) ions from aqueous solution by poly(allylamine-co-methacrylamide-co-dimethylthiourea). J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2019.12.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Devi P, Kothari P, Dalai AK. Stabilization and solidification of arsenic and iron contaminated canola meal biochar using chemically modified phosphate binders. JOURNAL OF HAZARDOUS MATERIALS 2020; 385:121559. [PMID: 31732344 DOI: 10.1016/j.jhazmat.2019.121559] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 09/27/2019] [Accepted: 10/27/2019] [Indexed: 06/10/2023]
Abstract
Adsorption is a widely used process for removal of heavy metals, but the management of spent adsorbent containing concentrated amounts of heavy metals is a problem due to potential risk of groundwater contamination from leaching of heavy metals. Generally, cementitious binder and additives are used for stabilization and solidification treatment, however heavy metals tend to leach from such matrices. Therefore, this research investigated the effectiveness of chemically modified phosphate biochar (CMPB) composite for the simultaneous solidification and stabilization of arsenic (As) and iron (Fe) contaminated canola meal biochar. Results showed that the performance of spent biochar added CMPB composites was significantly better than the pure composites (without biochar) due to filling of inter-aggregate pores using biochar and availability of sufficient amount of MgKPO4 for binding of biochar particles. Moreover, leaching test and risk assessment studies indicated that there is no potential adverse effect as the concentrations of As and Fe in TCLP leachate were well below the Universal Treatment Standard (UTS) in optimized CMPB composites. In conclusion, chemically modified phosphate binders were found effective in stabilization and solidification of As and Fe contaminated biochar into thermodynamically stable material with high immobilization capacity and low leachability.
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Affiliation(s)
- Parmila Devi
- Department of Chemical and Biological Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9, Canada
| | - Prachi Kothari
- Department of Chemical Engineering, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India
| | - Ajay K Dalai
- Department of Chemical and Biological Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9, Canada.
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16
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Wang L, Chen L, Tsang DCW, Zhou Y, Rinklebe J, Song H, Kwon EE, Baek K, Sik Ok Y. Mechanistic insights into red mud, blast furnace slag, or metakaolin-assisted stabilization/solidification of arsenic-contaminated sediment. ENVIRONMENT INTERNATIONAL 2019; 133:105247. [PMID: 31677577 DOI: 10.1016/j.envint.2019.105247] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 09/20/2019] [Accepted: 10/04/2019] [Indexed: 06/10/2023]
Abstract
Elevated level of arsenic (As) in marine sediment via deposition and accumulation presents long-term ecological risks. This study proposed a sustainable stabilization/solidification (S/S) of As-contaminated sediment via novel valorization of red mud waste, blast furnace slag and calcined clay mineral, which were selected to mitigate the increased leaching of As under alkaline environment of S/S treatment. Quantitative X-ray diffraction and thermogravimetric analyses illustrated that stable Ca-As complexes (e.g., Ca5(AsO4)3OH) could be formed at the expense of Ca(OH)2 consumption, which inevitably hindered the hydration process and S/S efficiency. The 29Si nuclear magnetic resonance analysis revealed that incorporation of metakaolin for As immobilization resulted in a low degree of hydration and polymerization, whereas addition of red mud promoted Fe-As complexation and demonstrated excellent compatibility with As. Transmission electron microscopy and elemental mapping further confirmed the precipitation of crystalline Ca-As and amorphous Fe-As compounds. Therefore, red mud-incorporated S/S binder achieved the highest efficiency of As immobilization (99.9%), which proved to be applicable for both in-situ and ex-situ S/S of As-contaminated sediment. These results advance our mechanistic understanding for the design of green and sustainable remediation approach for effective As immobilization.
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Affiliation(s)
- Lei Wang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield Building, Mappin St, Sheffield S1 3JD, United Kingdom
| | - Liang Chen
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Yaoyu Zhou
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Soil- and Groundwater-Management, Pauluskirchstraße 7, D-42285 Wuppertal, Germany; Sejong University, Department of Environment, Energy and Geoinformatics, 98 Gunja-Dong, Guangjin-Gu, Seoul, South Korea
| | - Hocheol Song
- Sejong University, Department of Environment, Energy and Geoinformatics, 98 Gunja-Dong, Guangjin-Gu, Seoul, South Korea
| | - Eilhann E Kwon
- Sejong University, Department of Environment, Energy and Geoinformatics, 98 Gunja-Dong, Guangjin-Gu, Seoul, South Korea
| | - Kitae Baek
- Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, Jeollabukdo 561-756, South Korea
| | - Yong Sik Ok
- Korea Biochar Research Center, Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, South Korea.
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17
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Li D, Gui C, Ji G, Hu S, Yuan X. An interpretation to Cr(Ⅵ) leaching concentration rebound phenomenon with time in ferrous-reduced Cr(Ⅵ)-bearing solid matrices. JOURNAL OF HAZARDOUS MATERIALS 2019; 378:120734. [PMID: 31203121 DOI: 10.1016/j.jhazmat.2019.06.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 05/21/2019] [Accepted: 06/04/2019] [Indexed: 06/09/2023]
Abstract
Toxicity characteristic leaching procedure (TCLP) is a prevalent way to evaluate the treatment effectiveness for Cr(Ⅵ)-bearing solid matrices (CBSM). But when a certain amount of residual reductants are present in the treated CBSM, Cr(Ⅵ) leaching concentration rebound phenomenon (CLCRP) occurs, which invalidates the TCLP. This study explores the microstructure of ferrous-reduced CBSM and proves that the residual Cr(Ⅵ), FexCr1-x(OH)3 precipitate and residual ferrous are separately distributed in a three-layer structure. In natural scenarios, the residual ferrous in the out-layer is firstly flushed away by rainfall and groundwater or oxidized by dissolved oxygen, resulting in the decrease of ferrous with time. Residual Cr(Ⅵ), due to being blocked by precipitate layer, is less flushed away. While in TCLP, all of released residual ferrous and Cr(Ⅵ) are in the leachate and react till one of them is almost exhausted, resulting in the underestimation of Cr(Ⅵ) leaching concentrations. The longer the samples experience the natural scenarios, the less of the residual ferrous, resulting in the decline of underestimation of Cr(Ⅵ) leaching concentrations with time. This study also provides a pretreatment which can effectively reduce the residual ferrous, achieving more accurate Cr(Ⅵ) leaching concentrations and eliminating CLCRP.
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Affiliation(s)
- Dong Li
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; School of Resources and Environmental Science, Chongqing University, Chongqing, 400044, PR China; Key Laboratory of Southwest Resources Exploitation and Environmental Hazards Controlling Engineering of Education Ministry, Chongqing University, Chongqing, 400030, PR China.
| | - Chenxin Gui
- School of Resources and Environmental Science, Chongqing University, Chongqing, 400044, PR China
| | - Guozhu Ji
- School of Resources and Environmental Science, Chongqing University, Chongqing, 400044, PR China
| | - Siyang Hu
- School of Resources and Environmental Science, Chongqing University, Chongqing, 400044, PR China
| | - Xingzhong Yuan
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; School of Resources and Environmental Science, Chongqing University, Chongqing, 400044, PR China; Key Laboratory of Southwest Resources Exploitation and Environmental Hazards Controlling Engineering of Education Ministry, Chongqing University, Chongqing, 400030, PR China
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18
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Wang L, Luo Z, Wei J, Zhou X, Zhang X, Ni H, Wang J, Song Y, Wu Z. Treatment of simulated electroplating wastewater containing Ni(II)-EDTA by Fenton oxidation combined with recycled ferrite process under ambient temperature. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:29736-29747. [PMID: 31402438 DOI: 10.1007/s11356-019-05990-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 07/16/2019] [Indexed: 06/10/2023]
Abstract
Developing low cost and efficient method for the treatment of electroplating wastewater containing heavy metals complexed with chelating agent has attracted increasing attention in industrial wastewater treatment. This study involved a system combining Fenton oxidation (FO) and recycled ferrite (RF) process for treating synthetic solution containing Ni(II)-EDTA at ambient temperature. In this system, the FO reaction can produce hydroxyl radicals with high redox potential to decomplex the metal-organic complexes and degrade the organics, thereby enhancing the removal efficiency of heavy metals. The RF process is to incorporate the non-iron metal into the spinel ferrites at room temperature, and stabilize the sludge. As a result, the toxicity characteristic leaching procedure can fulfill the relevant standards. Furthermore, the ferrous ions in Fenton reaction could be used as the source of irons in RF process. After treatment by the combined process, the effluent water fulfills the relevant standard in China. In comparison with conventional alkaline precipitation, the sludge sedimentation velocity of FO-RF is 2.16 times faster than that of conventional alkaline precipitation and the volume of sludge is reduced by half, which strongly demonstrated the advantages of the presented FO-RF system and indicated the huge potential for the treatment of EDTA-chelated nickel.
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Affiliation(s)
- Lei Wang
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China
- School of Environmental Resources, AnQing Normal University, No.1318 Jixian North Road, Anqing, 246133, China
| | - Zhijun Luo
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China.
| | - Jing Wei
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China
| | - Xiangtong Zhou
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China
| | - Xiaoying Zhang
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China
| | - Huicheng Ni
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China
| | - Jing Wang
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China
| | - Youye Song
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China
| | - Zhiren Wu
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China.
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19
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Rađenović D, Kerkez Đ, Pilipović DT, Dubovina M, Grba N, Krčmar D, Dalmacija B. Long-term application of stabilization/solidification technique on highly contaminated sediments with environment risk assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 684:186-195. [PMID: 31153066 DOI: 10.1016/j.scitotenv.2019.05.351] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/20/2019] [Accepted: 05/23/2019] [Indexed: 06/09/2023]
Abstract
After dredging of contaminated sediment, additional remediation technique is required before its final disposal. For this purpose, this research was based on the long-term stabilization/solidification (S/S) process of highly contaminated sediment (dominantly by heavy metals) from a European environmental hot spot, the Great Bačka Canal. Due to optimisation of remediation techniques, this sediment is treated with selected immobilization agents: kaolinite, quicklime and Portland cement. The use of pseudo-total metal content (selected priority substances: Cr, Ni, Cu, Cd, Zn, Pb and As) in untreated sediment, determined that sediment urgently requires remediation. Short-term (after 7 and 28 days) and long-term (after 7 years) monitoring were done in order to estimate the concentrations of metals and effect on biota from S/S mixtures during this processes. The environmental risk assessment encompassed the application of several appropriate analytical methods: the pseudo-total metal content, the German standard leaching test - DIN 3841-4 S4 and Toxicity Characteristic Leaching Procedure - TCLP test leaching tests and sequential extraction procedure (BCR) on S/S mixtures, testing the aging process and toxicity effects. After simulating real environmental conditions using all tests in all three mixtures, metals do not exceed the prescribed limit values and as such S/S mixtures are classified as non-hazardous waste. Sequential extraction procedure showed that the highest percentage of metals are in the residual phase, bound to silicates and crystalline structure. After 7 years of S/S mixture aging, kaolinite showed the highest binding capacity that was reflected in the content of metals in the residual phase (34.8% of Ni to 77.6% of Cr). DIN and TCLP leaching tests confirmed that the exchangeable phase has a minor effect on the environment. Accordingly, this remediation technology could be well applied for final disposal of this and similar extremely contaminated sediment dominantly with inorganic pollutants.
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Affiliation(s)
- Dunja Rađenović
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Dositej Obradovic Square 3, 21000 Novi Sad, Serbia.
| | - Đurđa Kerkez
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Dositej Obradovic Square 3, 21000 Novi Sad, Serbia
| | - Dragana Tomašević Pilipović
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Dositej Obradovic Square 3, 21000 Novi Sad, Serbia
| | - Miloš Dubovina
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Dositej Obradovic Square 3, 21000 Novi Sad, Serbia
| | - Nenad Grba
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Dositej Obradovic Square 3, 21000 Novi Sad, Serbia
| | - Dejan Krčmar
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Dositej Obradovic Square 3, 21000 Novi Sad, Serbia
| | - Božo Dalmacija
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Dositej Obradovic Square 3, 21000 Novi Sad, Serbia
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20
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Colorimetric Sensing of Pb2+ Ion by Using Ag Nanoparticles in the Presence of Dithizone. CHEMOSENSORS 2019. [DOI: 10.3390/chemosensors7030028] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Colorimetric analysis of heavy metal ions can be realized by the aid of Ag nanoparticles to improve the analytical characteristics. The method is based on the localized surface plasmon resonance (LSPR) properties of the Ag nanoparticles (AgNPs). In this work, we applied the AgNPs with the addition of dithizone to further improve the selectivity and sensitivity of Pb2+ analysis. Colorimetric sensing of Pb2+ ions based on the polyvinyl alcohol (PVA)-stabilized-colloidal AgNPs in the presence of dithizone is reported. A linear decrease in the AgNPs LSPR absorbance at 421 nm was observed along with the increase in the Pb2+ concentration in the range of 0.50–10 µg/L. The other ions give a minor change in the LSPR absorbance of colloidal AgNPs. The Pb2+ limit of detection, the limit of quantification, and sensitivity were found to be 0.64 ± 0.04 µg/L, 2.1 ± 0.15 µg/L, 0.0282 ± 0.0040 L/µg (n = 5), respectively. The obtained sensitivity is comparable with that of the immunosensing method. The proposed method could offer a good alternative for colorimetric analysis of Pb2+ ions by using nanoparticles in the presence of ligands, which can improve selectivity.
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21
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Su P, Li Y, Zhang J, Li Y. Characterization and chemical fixation of stainless steel pickling residue using sodium sulfide hydrate. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:10240-10250. [PMID: 30761496 DOI: 10.1007/s11356-019-04500-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 02/05/2019] [Indexed: 06/09/2023]
Abstract
The stainless steel pickling residue (SSPR) produced from the stainless steel industries in China contains large amounts of heavy metals such as chromium (Cr) and nickel (Ni). The study found that the hexavalent chromium Cr (VI) was the primary contributor to the leaching of Cr in the toxicity character leaching test. A chemical fixation with sodium sulfide was used to treat the SSPR, and the response surface methodology (RSM) was employed to optimize the process. The results revealed that the sodium sulfide dose and curing time had significant effects on the fixation of Cr. The higher was the sodium sulfide dose, and the longer the curing time, the lower the leaching concentration of Cr would be. The water addition amount had insignificant effect when it was higher than 70%. A dose of 1.2% sodium sulfide on dry mass basis, a water addition of 90-100%, and a curing time of longer than 10 days in the open air could reduce the leaching of Cr to below the beneficial use threshold. The low chemical dose and simple procedures established in this study make this treatment method cost-effective for rendering the SSPR into a nonhazardous and useful material.
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Affiliation(s)
- Peidong Su
- Department of Civil and Environmental Engineering, Jackson State University, Jackson, MS, 39217, USA.
| | - Yang Li
- Department of Civil and Environmental Engineering, Jackson State University, Jackson, MS, 39217, USA
| | - Junke Zhang
- Department of Civil and Environmental Engineering, Jackson State University, Jackson, MS, 39217, USA
| | - Yadong Li
- Department of Civil and Environmental Engineering, Jackson State University, Jackson, MS, 39217, USA
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22
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Park JH, Wang JJ, Zhou B, Mikhael JER, DeLaune RD. Removing mercury from aqueous solution using sulfurized biochar and associated mechanisms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:627-635. [PMID: 30384068 DOI: 10.1016/j.envpol.2018.10.069] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 10/09/2018] [Accepted: 10/14/2018] [Indexed: 06/08/2023]
Abstract
Biochar has been used to remove heavy metals from aqueous solutions. In this study, a sulfurized wood biochar (SWB) by direct impregnation with elemental sulfur was produced and evaluated along with pristine wood biochar (WB) for adsorption characteristics and mechanism of mercury. Mercury adsorption by WB and SWB was well described by Langmuir model and pseudo second order model and the maximum adsorption capacities of WB and SWB were 57.8 and 107.5 mg g-1, respectively. Intraparticle diffusion model showed that mercury adsorption was fast due to boundary layer and slow adsorption due to diffusion into biochar pores. Although, mercury adsorption by both WB and SWB was predominantly influenced by the pH, temperature, salt concentration, and biochar dosage, the SWB showed a relatively stable mercury adsorption compared to WB under different conditions, suggesting the strong affinity of SWB for mercury. The XPS analysis showed different adsorption mechanisms of mercury between WB and SWB. In particular, mercury adsorption in WB was due to Hg-Cπ bond formation and interaction with carboxyl and hydroxyl groups, whereas in SWB it is primarily due to mercury interaction with C-SOx-C and thiophenic groups in addition to Hg-Cπ bond formation and interaction with carboxyl groups. The SEM-EDS mapping also demonstrated that mercury in SWB was related to carbon, oxygen and sulfur. Overall, the sulfurized biochar was effective for removing mercury from aqueous solution, and its direct production through pyrolysis with elemental sulfur impregnation of wood chips could make it an economic option as absorbent for treating mercury-rich wastewater.
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Affiliation(s)
- Jong-Hwan Park
- School of Plant, Environmental and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Jim J Wang
- School of Plant, Environmental and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA.
| | - Baoyue Zhou
- School of Plant, Environmental and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Joseph E R Mikhael
- School of Plant, Environmental and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Ronald D DeLaune
- Department of Oceanography and Costal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA, 70803, USA
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23
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Zhao C, Shao S, Zhou Y, Yang Y, Shao Y, Zhang L, Zhou Y, Xie L, Luo L. Optimization of flocculation conditions for soluble cadmium removal using the composite flocculant of green anion polyacrylamide and PAC by response surface methodology. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 645:267-276. [PMID: 30029108 DOI: 10.1016/j.scitotenv.2018.07.070] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 07/05/2018] [Accepted: 07/06/2018] [Indexed: 06/08/2023]
Abstract
In this work, we describe a flocculation performance evaluation of a novel anionic polyacrylamide (APAM) synthesized using low dose γ-ray initiation. The APAM structure and morphology were characterized using Fourier transform-infrared spectroscopy (FTIR), High performance liquid chromatography (HPLC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) techniques. In comparison to commercially purchased APAM (Mw = 1.0 × 107), γ-ray initiation was demonstrated to be a more effective method to increase molecular weight, decrease the residual acrylamide monomer, and improve thermal stability. Flocculant performance was evaluated by assessing their ability to remove Cd(II) from water. We utilized the Plackett-Burman (PB), steepest ascent, and response surface methodology (RSM) experimental design to identify the optimal flocculating conditions for the removal of soluble Cd(II). Under optimal conditions [26.84 mg L-1 CaO, 71.28 mg L-1 polyaluminium chloride (PAC) and 2.87 mg L-1 APAM], the maximum percent removal of Cd(II) was observed to reach 93.65%. A potential flocculation mechanism for the Cd(II) removal from water was further studied by evaluating the colloid Zeta potential. Results from these studies demonstrated that PAC had a greater capability to change the Zeta potential of collide under alkaline conditions, while APAM played a critical role in the bridging, enmeshment, and sweeping effect. The composite of two types of predominance makes considerable sense in regards to enhancing flocculating efficiency, decreasing secondary pollution, and reducing flocculant cost.
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Affiliation(s)
- Caifeng Zhao
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Hunan Province Engineering Technology Research Center of Agricultural Biological Irradiation, Changsha 410125, China
| | - Sai Shao
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Hunan Province Engineering Technology Research Center of Agricultural Biological Irradiation, Changsha 410125, China.
| | - Yaoyu Zhou
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Yahui Yang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Ying Shao
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Hunan Province Engineering Technology Research Center of Agricultural Biological Irradiation, Changsha 410125, China
| | - Leping Zhang
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Hunan Province Engineering Technology Research Center of Agricultural Biological Irradiation, Changsha 410125, China
| | - Yiji Zhou
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Hunan Province Engineering Technology Research Center of Agricultural Biological Irradiation, Changsha 410125, China
| | - Linian Xie
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Hunan Province Engineering Technology Research Center of Agricultural Biological Irradiation, Changsha 410125, China
| | - Lin Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
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Utilization of isolated marine mussel cells as an in vitro model to assess xenobiotics induced genotoxicity. Toxicol In Vitro 2017; 44:219-229. [DOI: 10.1016/j.tiv.2017.05.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 05/21/2017] [Accepted: 05/24/2017] [Indexed: 02/08/2023]
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