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Simultaneous removal of arsenic and antimony from mining wastewater using granular TiO_2:Batch and field column studies

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Journal of Environmental Sciences 2019年第1期31卷 269-276页

作者： Shixin Qiu Li Yan chuanyong jing Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences

Coexisting arsenic(As) and antimony(Sb) in mining wastewater is a common and great concern. On-site simultaneous removal of As and Sb from mining wastewater was achieved by using a reusable granular TiO_2 column in this study. To evaluate the accuracy of the scale-up procedure, As and Sb adsorption from wastewater was studied in both large(600 g TiO_2) and small columns(12 g TiO_2) based on the proportional diffusivity rapid small-scale column tests(PD-RSSCTs) design. The comparable As and Sb breakthrough curves obtained from small and large columns confirmed the accuracy of the PD-RSSCT theory in the design of large-scale columns. Meanwhile, the consistent As and Sb adsorption results from batch and column experiments suggested that TiO_2 adsorption for As and Sb can be predicted from bench-scale tests. Charge distribution multi-site complexation(CD-MUSIC) and onedimensional transport modeling integrated in the PHREEQC program were performed to study the adsorption behaviors of As and Sb on the TiO_2 surface. Coexisting ions, such as Ca^(2+), Mg^(2+), and Si^(4+), play an important role in As and Sb adsorption, and the breakthrough curves were well simulated after considering the compound ion effects. The results from this study highlight the surface reactions of As and Sb on TiO_2 and provide a practical way for on-site remediation of industrial wastewater.

关键词： Coexisting As and Sb Surface complexation Breakthrough curves One-dimensional transport

Experimental and molecular dynamic simulation study of perfluorooctane sulfonate adsorption on soil and sediment components

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Journal of Environmental Sciences 2015年第3期27卷 131-138页

作者： Ruiming Zhang Wei Yan chuanyong jing State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of Sciences

Soil and sediment play a crucial role in the fate and transport of perfiuorooctane sulfonate （PFOS） in the environment. However, the molecular mechanisms of major soil/sediment components on PFOS adsorption remain unclear. This study experimentally isolated three major components in soil/sediment： humin/kerogen, humic/fulvic acid （HA/FA）, and inorganic component after removing organics, and explored their contributions to PFOS adsorption using batch adsorption experiments and molecular dynamic simulations. The results suggest that the humin/kerogen component dominated the PFOS adsorption due to its aliphatic features where hydrophobic effect and phase transfer are the primary adsorption mechanism. Compared with the humin/kerogen, the HA/FA component contributed less to the PFOS adsorption because of its hydrophilic and polar characteristics. The electrostatic repulsion between the polar groups of HA/FA and PFOS anions was attributable to the reduced PFOS adsorption. When the soil organic matter was extracted, the inorganic component also plays a non-negligible role because PFOS molecules might form surface complexes on SiO2 surface. The findings obtained in this study illustrate the contribution of organic matters in soils and sediments to PFOS adsorption and provided new perspective to understanding the adsorption process of PFOS on micro-interface in the environment.

关键词： Humic/fulvic acid Humin/kerogen PFOS Adsorption Molecular dynamics

Recent progress of arsenic adsorption on TiO2 in the presence of coexisting ions： A review

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Journal of Environmental Sciences 2016年第11期28卷 74-85页

作者： Li Yan Shan Hu chuanyong jing State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China University of Chinese Academy of Sciences Beijing 100049 China

Arsenic（As）-contaminated wastewater and groundwater pose a pressing environmental issue and worldwide concern. Adsorption of As using TiO_2materials, in combination with filtration,introduces a promising technology for the treatment of As-contaminated water. This review presents an overview on the recent progress of the application of TiO_2for removal of As from wastewater and groundwater. The main focus is on the following three pressing issues that limit the field applications of TiO_2for As removal： coexisting ions, simulation of breakthrough curves, and regeneration and reuse of spent TiO_2materials. We first examined how the coexisting ions in water, especially high concentrations of cations in industrial wastewater,affect the efficacy of As removal using the TiO_2materials. We then discussed As breakthrough curves and the effect of compounded ions on the breakthrough curves. We successfully simulated the breakthrough curves by PHREEQC after integrating the CD-MUSIC model. We further discussed challenges facing the regeneration and reuse of TiO_2media for practical applications. We offer our perspectives on remaining issues and future research needs.

关键词： Arsenic TiO2 adsorbent Coexisting ions CD-MUSIC PHREEQC Regeneration

Recent progress in detection of mercury using surface enhanced Raman spectroscopy — A review

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Journal of Environmental Sciences 2016年第1期28卷 134-143页

作者： Zhenli Sun jingjing Du chuanyong jing State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Concerns over exposure to mercury have motivated the exploration of cost-effective,rapid,and reliable method for monitoring Hg^2＋ in the ***,surface-enhanced Raman scattering（SERS） has become a promising alternative method for Hg^2＋ *** is a spectroscopic technique which combines modern laser spectroscopy with the optical properties of nano-sized noble metal structures,resulting in substantially increased Raman *** Hg^2＋ is in a close contact with metallic nanostructures,the SERS effect provides unique structural information together with ultrasensitive detection *** review introduces the principles and contemporary approaches of SERS-based Hg^2＋*** addition,the perspective and challenges are briefly discussed.

关键词： Mercury SERS Detection Substrate Nanoparticles

A novel colorimetric method for field arsenic speciation analysis

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Journal of Environmental Sciences 2012年第7期24卷 1341-1346页

作者： Shan Hu Jinsuo Lu chuanyong jing State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Environmental and Municipal Engineering Xi'an University of Architecture and TechnologyXi'an 710055China

Accurate on-site determination of arsenic （As） concentration as well as its speciation presents a great environmental challenge especially to developing countries. To meet the need of routine field monitoring, we developed a rapid colorimetric method with a wide dynamic detection range and high precision. The novel application of KMnO4 and CHaN2S as effective As（III） oxidant and As（V） reductant, respectively, in the formation of molybdenum blue complexes enabled the differentiation of As（III） and As（V）. The detection limit of the method was 8 ~tg/L with a linear range （R2 = 0.998） of four orders of magnitude in total As concentrations. The As speciation in groundwater samples determined with the colorimetric method in the field were consistent with the results using the high performance liquid chromatography atomic fluorescence spectrometry, as evidenced by a linear correlation in paired analysis with a slope of 0.9990- 0.9997 （p 〈 0.0001, n = 28）. The recovery of 96%-116% for total As, 85%-122% for As（III）, and 88%-127% for As（V） were achieved for groundwater samples with a total As concentration range 100-800 μg/L. The colorimetric result showed that 3.61 g/L As（III） existed as the only As species in a real industrial wastewater, which was in good agreement with the HPLC-AFS result of 3.56 g/L As（Ⅲ）. No interference with the color development was observed in the presence of sulfate, phosphate, silicate, humic acid, and heavy metals from complex water matrix. This accurate, sensitive, and easy-to-use method is especially suitable for field As determination.

关键词： arsenic speciation colorimetric method groundwater field analysis

Arsenic biotransformation in industrial wastewater treatment residue: Effect of co-existing Shewanella ***-3 and MR-1

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Journal of Environmental Sciences 2022年第8期34卷 14-20页

作者： Hao Li Lixin Zhang Li Ye chuanyong jing State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China School of Environmental Science and Engineering Shandong UniversityQingdao 266237China

Shewanella sp. ANA-3 with the respiratory arsenate reductase(ArrAB) and MR-1 with ferric reduction ability always coexist in the presence of high arsenic(As)-containing waste residue. However, their synergistic impacts on As transformation and mobility remain unclear. To identify which bacterium, ANA-3 or MR-1, dominates As mobility in the coexisting environment, we explored the As biotransformation in the industrial waste residue in the presence of Shewanella sp. ANA-3 and MR-1. The incubation results show that As(Ⅲ)was the main soluble species, and strain ANA-3 dominated As mobilization. The impact of ANA-3 was weakened by MR-1, probably due to the survival competition between these two bacteria. The results of micro X-ray fluorescence and X-ray photoelectron spectroscopy analyses further reveal the pathway for ANA-3 to enhance As mobility. Strain ANA-3 almost reduced 100% surface-bound Fe(Ⅲ), and consequently led to As(V) release. The dissolved As(V) was then reduced to As(Ⅲ) by ANA-3. The results of this study help to understand the fate of arsenic in the subsurface and highlight the importance of the safe disposal of high As-containing industrial waste.

关键词： Arsenic Shewanella sp.ANA-3 and MR-1 Coexistence Biotransformation Waste residue

Immobilization and transformation of co-existing arsenic and antimony in highly contaminated sediment by nano zero-valent iron

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Journal of Environmental Sciences 2022年第2期34卷 152-160页

作者： Jianlong Guo Zhipeng Yin Wen Zhong chuanyong jing State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China School of Environmental Science and Engineering Shandong UniversityQingdao 266237China

Arsenic(As)and antimony(Sb)are usually coexistent in mine wastes and pose a great threat to human *** As immobilization by nano zero-valent iron(n ZVI)is promising,however,the stabilization for co-occurring As and Sb is not ***,the immobilization and transformation of As and Sb in n ZVI-treated sediments were evaluated using complementary leaching experiments and characterization *** sediment samples from a gold-antimony deposit revealed the co-existence of ultrahigh As and Sb at 50.3 and 14.9 g/kg,*** results show that As was more efficiently stabilized by n ZVI than Sb,which was primarily due to the soluble fraction that was readily absorbed by n ZVI of As was *** the n ZVI treatment proceeds,the oxidation and reduction of As and Sb occur simultaneously as evidenced by XPS *** primary oxidant,hydroxyl radicals,was detected by EPR studies,proving the occurrence of n ZVI induced Fenton *** study sheds light on differences in the interaction and immobilization of n ZVI with Sb and As in co-contaminated sediments.

关键词： Arsenic Antimony Nano zero-valent iron Immobilization Transformation Leaching

Asenic removal from groundwater using granular chitosan-titanium adsorbent

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Journal of Environmental Sciences 2022年第2期34卷 202-209页

作者： Zuben Xu Yaqin Yu Li Yan Wei Yan chuanyong jing State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China School of Environmental Science and Engineering Shandong UniversityQingdao 266237China

Arsenic(As)contamination poses an urgent environmental risk,and its removal from groundwater remains a challenge due to the lack of efficient ***,a novel granular chitosan-titanium(CS-Ti)adsorbent was fabricated by the sol-gel *** experiments show that As(V)adsorption on CS-Ti followed the pseudo-second-order kinetic model,and the adsorption isotherm conformed to the Freundlich model with the correlation coefficient of *** situ FTIR spectra revealed that the CS-Ti adsorbent was composed of amorphous TiO_(x) and chitosan by forming C-O-Ti and N-Ti bonds,and the amorphous TiO_(x) was responsible for As(V)*** small-scale column tests show that 165.6μg/L of As in groundwater were effectively removed in approximately 126-bed volumes,and the spent adsorbents were regenerated with 0.01 mol/L Na OH and maintained the adsorption efficiency after four *** study provides a simple and practical route to fabricate adsorbents for water treatment.

关键词： Arsenic Chitosan Titanium Groundwater Adsorption

Groundwater arsenic removal by coagulation using ferric(Ⅲ)sulfate and polyferric sulfate: A comparative and mechanistic study

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Journal of Environmental Sciences 2015年第6期27卷 42-53页

作者： Jinli Cui chuanyong jing Dongsheng Che Jianfeng Zhang Shuxuan Duan State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences School of Environmental and Municipal Engineering Xi'an University of Architecture and Technology State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Elevated arsenic（As） in groundwater poses a great threat to human health. Coagulation using mono- and poly-Fe salts is becoming one of the most cost-effective processes for groundwater As removal. However, a limitation comes from insufficient understanding of the As removal mechanism from groundwater matrices in the coagulation process, which is critical for groundwater treatment and residual solid disposal. Here, we overcame this hurdle by utilizing microscopic techniques to explore molecular As surface complexes on the freshly formed Fe flocs and compared ferric（III） sulfate（FS） and polyferric sulfate（PFS）performance, and finally provided a practical solution in As-geogenic areas. FS and PFS exhibited a similar As removal efficiency in coagulation and coagulation/filtration in a two-bucket system using 5 mg/L Ca（ClO）_2. By using the two-bucket system combining coagulation and sand filtration, 500 L of As-safe water（〈 10 μg/L） was achieved during five treatment cycles by washing the sand layer after each cycle. Fe k-edge X-ray absorption near-edge structure（XANES） and As k-edge extended X-ray absorption fine structure（EXAFS） analysis of the solid residue indicated that As formed a bidentate binuclear complex on ferrihydrite, with no observation of scorodite or poorly-crystalline ferric arsenate. Such a stable surface complex is beneficial for As immobilization in the solid residue, as confirmed by the achievement of much lower leachate As（0.9 μg/L-0.487 mg/L）than the US EPA regulatory limit（5 mg/L）. Finally, PFS is superior to FS because of its lower dose, much lower solid residue, and lower cost for As-safe drinking water.

关键词： Groundwater As removal Ferric(Ⅲ) sulfate(FS) Polyferric sulfate(PFS) Coagulation EXAFS Leaching