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arsenic removal from acidic industrial wastewater by ultrasonic activated phosphorus pentasulfide

Chinese Journal of Chemical Engineering 2023年第8期60卷 46-52页

作者： Bo Yu Guang Fu Xinpei Li Libo Zhang Jing Li Hongtao Qu Dongbin Wang Qingfeng Dong Mengmeng Zhang Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China Kunming Key Laboratory of Special Metallurgy Kunming University of Science and TechnologyKunming 650093China Key Laboratory of Unconventional Metallurgy Ministry of EducationKunming 650093China Yunnan Chihong Zn&Ge Co. LtdQujing 655011China

arsenic is one of the main harmful elements in industrial *** to remove arsenic has always been one of the research hotspots in academic *** the process of arsenic removal by traditional sulfuration,the use of traditional sulfurizing agent will introduce new metal cations,which will affect the recycling of *** this study,phosphorus pentasulfide (P_(2)S_(5)) was used as sulfurizing agent,which hydrolyzed to produce H_(3)PO_(4) and H_(2)S without introducing new metal *** effect of ultrasound on arsenic removal by P_(2)S_(5) was *** the action of ultrasound,the utilization of P_(2)S_(5) was improved and the reaction time was *** effects of S/As molar ratio and reaction time on arsenic removal rate were investigated under ultrasonic *** enhanced heat and mass transfer so that the arsenic removal rate of 94.5%could be achieved under the conditions of S/As molar ratio of 2.1:1 and reaction time of 20 *** the first 60 min,under the same S/As molar ratio and reaction time,the ultrasonic hydrolysis efficiency of P_(2)S_(5) was *** is because P_(2)S_(5) forms ([(P_(2)S_(4))])^(2+)under the ultrasonic action,and the structure is damaged,which is easier to be *** addition,the precipitation after arsenic removal was characterized and analyzed by X-ray diffraction,scanning electron microscope-energy dispersive spectrometer,X-ray fluorescence spectrometer and X-ray photoelectron *** research avoids the introduction of metal cations in the arsenic removal process,and shortens the reaction time.

关键词： arsenic removal Mass transfer Precipitation Waste water Ultrasound

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arsenic removal from Pinctada martensii Enzymatic Hydrolysate by Using Zr(Ⅳ)-Loaded Chelating Resin

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Journal of Ocean University of China 2013年第3期12卷 392-396页

作者： YANG Xiaoman DAI Wenjin SUN Huili PAN Jianyu Yantai Institute of Coastal Zone Research Chinese Academy of Sciences South China Sea Institute of Oceanology Chinese Academy of SciencesCAS Key Laboratory of Marine Bio-Resourses Sustainable Utilization University of Chinese Academy of Sciences

The present study investigated the removal of inorganic arsenic from Pinctada martensii enzymatic hydrolysate through unmodified resin （D296） and Zr（IV）-loaded chelating resin （Zr-D401）. By loading Zr to macroporous chelating resin D401, the as exchange adsorption active sites are generated. This transforms D401 from a material that does not have the arsenic adsorption capacity into a material that has excellent arsenic exchange adsorption capacity. The static adsorption experiments were conducted to investigate the optimal removal condition for D296 and Zr-D401. The experimental results show that： the optimum condition for D296 is that T= 25℃, pH= 5, resin additive amount= 1 g （50 mL）-1, and contact time = 10 h, the corresponding arsenic removal rate being 65.7%, and protein loss being 2.33%; the optimum condition for Zr-D401 is that T=25 ℃, pH = 8, resin additive amount= 1 g （50 mL）-1, and contact time=10 h, the corresponding arsenic removal rate being 70.3%, and protein loss being 4.65%. These results show that both of the two resins are effective in arsenic removal for preserving useful substance. Our research provides scientific evidence and advances in the processing technology for heavy metal removal in shellfish.

关键词： Pinctada martensii enzymolysis arsenic removal chelating resin

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Synthesis of novel hydrated ferric oxide biochar nanohybrids for efficient arsenic removal from wastewater

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Rare Metals 2022年第5期41卷 1677-1687页

作者： Tong Zhu Yun Zhang Yu Chen Jun-Liang Liu Xiao-Li Song College of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

Hydrated ferric oxide(HFO)has high adsorption efficiency for As(Ⅲ).However,its high self-aggregation usually reduces the efficiency and limits the scaledup ***,biochar(BC),with large surface area and amounts of surface functional groups was used to tune the loading and distribution of HFO to prepare an efficient adsorbent(HFO/BC)via in-situ synthesis *** influence of the mass ratio of iron salt to BC on HFO/BC morphology was investigated,and the mechanism was *** results showed that novel HFO was formed and distributed uniformly on the surface of BC when the mass ratio of iron salt to BC was 5:*** adsorption kinetics and isotherms studies show that the novel HFO/BC(5:1)composite can fast treat As(Ⅲ)with a high adsorption capacity of 104.55 mg·g^(-1),indicating that it is a potential material for removing arsenic from polluted water.

关键词： Hydrated ferric oxide arsenic removal Biochar Water treatment

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Evaluation of the adsorption potential of titanium dioxide nanoparticles for arsenic removal

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Journal of Environmental Sciences 2009年第3期21卷 402-408页

作者： NABI Deedar ASLAM Irfan QAZI Ishtiaq A Institute of Environmental Science and Engineering National University of Sciences and Technology Rawalpindi 46000 Pakistan

The adsorption potential of titanium dioxide （TiO2） nanoparticles for removing arsenic from drinking water was evaluated. Pure and iron-doped TiO2 particles are synthesized via sol-gel method. The synthesized TiO2 nanoparticles were then immobilized on ordinary sand for adsorption studies. Adsorption isotherms were conducted on the synthesized nanoparticles as well as the sand coated with TiO2 nanoparticles under varying conditions of air and light, namely, the air-sunlight （A-SL）, air-light （AL）, air-dark （AD） and nitrogen-dark （ND）. X-ray diffraction （XRD） analysis showed that the pure and iron-doped TiO2 nanoparticles were in 100% anatase crystalline phase with crystai sizes of 108 and 65 nm, respectively. Adsorption of arsenic on the three adsorbents was non-linear that could be described by the Freundlich and Langmuir adsorption models. Iron doping enhanced the adsorption capacity of TiO2 nanoparticles by arresting the grain growth and making it visible light responsive resulting in a higher affinity for arsenic. Similarly, the arsenic removal by adsorption on the sand coated with TiO2 nanoparticles was the highest among the three types of sand used. In all cases, As（V） was adsorbed more compared with As（Ⅲ）. The solution pH appeared to be the most important factor in controlling the amount of arsenic adsorbed.

关键词： arsenic removal titanium dioxide nanoparticles adsorption isotherm immobilization of nanoparticles on sand

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φ-pH diagram of As-N-Na-H_2O system for arsenic removal during alkaline pressure oxidation leaching of lead anode slime

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Transactions of Nonferrous Metals Society of China 2017年第3期27卷 676-685页

作者： Yun-long HE Rui-dong XU Shi-wei HE Han-sen CHEN Kuo LI Yun ZHU Qing-feng SHEN Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China

In order to illustrate the thermodynamic characteristics of arsenic during alkaline pressure oxidation leaching process oflead anode slime(NaNO3as oxidant;NaOH as alkaline reagent),theφ-pH diagrams of As-Na-H2O,N-H2O,As-N-Na-H2Osystems at ionic mass concentration of0.1mol/kg and temperatures of298,373,423and473K were established according tothermodynamic *** results show that the existence forms of arsenic are associated with pH value,which mainly exists inthe forms of H3AsO4,24H AsO-,24HAsO-,H2AsO2-and As2O3in lower pH region,while it mainly exists in the form of3AsO4-when pH>*** alkali concentration and high temperature are advantageous to the arsenic *** alkaline pressureoxidation leaching experiments display that the tendency of arsenic leaching rate confirms the thermodynamic analysis resultsobtained from theφ-pH diagrams of As-N-Na-H2O system,and the highest leaching rate of arsenic reaches95.85%at453K.

关键词： φ-pH diagram As-N-Na.H2O system lead anode slime leaching arsenic removal

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Correlation between Iron Reducibility in Natural and Iron-Modified Clays and Its Adsorptive Capability for arsenic removal

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Advances in Materials Physics and Chemistry 2016年第5期6卷 129-139页

作者： Irma Lia Botto Simonetta Tuti María Jose Gonzalez Delia Gazzoli CEQUINOR (CCT-La Plata-UNLP) La Plata Argentina Dipartimento di Scienze Universitá Roma Tre Roma Italy INREMI (CICPBA-UNLP) La Plata Argentina Dipartimento di Chimica Universitá La Sapienza Roma Italy

The study reports aspects that allowed to correlate structural and redox properties of iron species deposited on clay minerals with the capacity of geomaterials for arsenic removal. Natural ferruginous clays as well as an iron-poor clay chemically modified with Fe(III) salt (ferrihydrite species) were investigated as adsorbents of the arsenate(V) in water. The study, carried out from minerals from abundant Argentinean deposits, was conducted with the aid of different techniques such as X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM-EDS), Raman Spectroscopy, ICP-AES (Inductively Coupled Plasma) chemical analysis and Temperature Programmed Reduction (TPR). This last technique allowed to detect availability of iron species in oxidic environment with different structural complexity and to determine active sites, accessible for arsenate(V) adsorption. The effect was observed through temperature dependence of the first Fe(III) reduction step (below 570°C) of iron-oxide species. The sequence of reducibility: ferrihydrite > hydrous oxide (goethite) > anhydrous oxide (hematite) > structural iron in clay was in agreement with the availability of iron active sites for the reducing process as well as for the arsenate adsorption. The important role of very high iron content in original samples was also observed. The chemical activation of iron-poor clay by a simple and feasible modification with Fe(III) solutions promoted the deposition of the ferrihydrite active phase with an increase of 2.81% (expressed as Fe2O3) respect to the original content of 1.07%, constituting an accessible and eco-friendly technological alternative to solve the environmental problem of water containing arsenic.

关键词： Temperature Programmed Reduction Iron-Oxide Species arsenic removal

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Synthesis of novel adsorbent by intercalation of biopolymer in LDH for the removal of arsenic from synthetic and natural water

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Journal of Environmental Sciences 2020年第5期32卷 246-261页

作者： Hanen Bessaies Sidra Iftekhar Bhairavi Doshi Jamel Kheriji Mohamed Chaker Ncibi Varsha Srivastava Mika Sillanpaa Bechir Hamrouni Laboratory of Desalination and Water Treatement LR19ES01 Faculty of Sciences of TunisTunis El Manar University2092El Manar ITunisia Department of Separation Science Lappeenranta-Lahti University of Technology(LUT)Sammonfeatu 12FI-50130MikkeliFinland International Water Research Institute MohammedⅥPolytechnic UniversityCity Ben Guerir 43150Morocco Department of Civil and Environmental Engineering Florida International UniversityMiamiFL 33174USA Department of Environmental Engineering University of Engineering and TechnologyTaxilaPakistan

This study focuses on the synthesis of nanocomposites named CCA and CZA that were prepared by the incorporation of cellulose(CL)in the Ca/Al and Zn/Al layered double hydroxide(LDH),*** materials were then used for the uptake of As(Ⅲ)and As(V)from aqueous *** of both nanocomposites(CCA and CZA)was done using FTIR and Raman analysis to identify the functional groups,N2 adsorption-desorption isotherms to determine the specific surface area and pore geometry and XPS analysis to obtain the surface atomic *** other characters were investigated using simultaneous TGA and DTA and elemental chemical analysis(CHNS/O).The crystallinity of the prepared nanocomposites was displayed by XRD ***,the sheet-like structure of the LDHs and the irregularity of surface morphology with porous structure were observed by TEM and SEM *** of maximum adsorption capacity was adjusted using different parameters including pH,contact time and adsorbent *** pseudo-second-order model was in good fitting with kinetics *** adsorption isotherm results showed that CZA exhibits better adsorption capacity for As(Ⅲ)than CCA and the Langmuir isotherm model described the data well for both *** studies illustrated the endothermic nature of CCA and exothermic nature on CZA,as well as the fact that the adsorption process is spontaneous.A real water sample collected from well located in Gabes(Tunisia),has also been *** obtained experimental results were confirmed that these sorbents are efficient for the treatment of hazardous toxic species such as.

关键词： Layered double hydroxide Adsorption arsenic removal Kinetics Natural water treatment

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The removal of arsenic from (ground)-water by adsorbent loaded in polymeric microspheres

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Journal of Harbin Institute of Technology(New Series) 2012年第1期19卷 63-66页

作者： FIGOLI A HOINKIS J CRISCUOLI A FRANZ C DE RYCKE M BLOCK C DEOWAN S A ISLAM R DRIOLI E Institute on Membrane Technology (ITM-CNR) Via Pietro BucciCubo 17C87030 Rende ( CS) Italya Karlshrue University of Applied Sciences Moltkestr. 30 76133KarlshrueGermany Sustainable Process Materials Engineering GROUP T-Leuven Engineering CollegeVesaliusstraat 133000 LeuvenBelgium

arsenic is a natural tasteless and odourless element,existing in the earth's crust at average levels of between two and five thousands micrograms per liter (parts per million) . arsenic is highly toxic to humans, who are exposed to it primarily from air,food and water. The occurrence of arsenic in groundwater is due to geological composition of soil. High concentrations of arsenic in water are the result of dissolution or desorption of ferric oxides and the oxidation of mineral arsenopyrites. arsenic in drinking water has an important impact on the human health,especially in the less developed countries. Different methods exist to remove arsenic from aquatic media,and one of them is by adsorption. In this work,the adsorption of both As(III) and As(V) by means of novel microspheres has been investigated. In particular,TiO2 has been embedded into polymeric microspheres PES (PolyEtherSulphone) and PEEK-WC (PolyEtherEther-Ketone) . The main advantages of this encapsulation adsorption material are: no loss of adsorbents into the water stream,easy to be used and scaled-up.

关键词： arsenic removal adsorption TiO2 polymeric microspheres

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arsenic in Drinking Water and Its removal

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Chinese Journal of Population,Resources and Environment 2007年第3期5卷 23-30页

作者： Liu Zhenzhong Deng Huiping Zhan Jian School of Architecture Nanchang University Nanchang Jiangxi 330031 China School of Environment Science and Engineering Tongji University Shanghai 200092 China

Superfluous arsenic in drinking water can do harm to human health. In this paper, a broad overview of the available technologies for arsenic removal has been presented on the basis of literature survey. The main treatment methods included coagulation-sedimentation, adsorption separation and ion exchange, membrane technique, which have both advantages and disadvantages. It concluded that the selection of treatment process should be site specific and prevailing conditions and no process can serve the purpose under diverse conditions as each technology has its own limitations. In order to gain good results, some methods should be improved.

关键词： arsenic removal coagulation-sedimentation adsorption ion exchange membrane technique

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Selective removal of As from arsenic-bearing dust rich in Pb and Sb

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Transactions of Nonferrous Metals Society of China 2019年第10期29卷 2213-2221页

作者： Xue-yi GUO Lei ZHANG Qing-hua TIAN Da-wei YU Jing SHI Yu YI School of Metallurgy and Environment Central South UniversityChangsha 410083China Cleaner Metallurgical Engineering Research Center China Nonferrous Metals Industry AssociationChangsha 410083China

The selective removal of arsenic from arsenic-bearing dust containing Pb and Sb in alkaline solution was studied. The influence of Na OH concentration, temperature, leaching time, liquid to solid ratio, and the presence of elemental sulfur on the dissolution of As, Sb and Pb in Na OH solution was investigated. The results indicate that the presence of elemental sulfur can effectively prevent leaching of lead and antimony from arsenic. The Sb2O3, As2O3 and Pb5(AsO4)3 OH in the raw material convert to NaSb(OH)6 and PbS in the leaching residue, while arsenic is leached out as As(Ⅲ) or As(Ⅴ) ions in the leaching solution. arsenic leaching efficiency of 99.84% can be achieved under the optimized conditions, while 97.82% of Sb and 99.97% of Pb remain in the leach residue with the arsenic concentration of less than 0.1%. A novel route is presented for the selective removal of arsenic and potential recycle of lead and antimony from the arsenic-bearing dust leached by Na OH solutions with the addition of elemental sulfur.

关键词： arsenic removal sulfur arsenic-bearing dust alkaline leaching lead antimony

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