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| 1 | Preparation of high concentration polyaluminum chloride with high content of Al_b or Al_c显示文摘A novel membrane distillation concentration method was used to prepare high concentration polyaluminum chloride (PACl) with high content of Alb or Alc. 2.52 mol/L PACl1 with 88% Alb and 2.38 mol/L PACl2 with 61% Alc were successfully prepared. Three coagulants, AlCl3, PACl1 and PACl2 were investigated on their hydrolysis behavior and speciation under different conditions. The effects of pH and dilution ratio on Al species distribution were investigated by ferron assay. Experimental result showed that pH had a significant effect on Al species distribution for the three coagulants. Dilution ratio had little effects on Alb and Alc distribution in whole dilution process except the beginning for PACl1 and PACl2. The results indicated that transformation of Al depends largely on their original composition. AlCl3 was the most unstable coagulant among these three coagulants during hydrolysis process. PACl1 and PACl2 with significant amounts of highly charged and stable polynuclear aluminum hydrolysis products were less affected by the hydrolysis conditions and could maintain high speciation stability under various conditions. | ZHAO Changwei ZHANG Jingbo LUAN Zhaokun PENG Xianjia REN Xiaojing | 2009 | Journal of Environmental Sciences2009，21，10： | 3 |
| 2 | Arsenic retention and transport behavior in the presence of typical anionic and nonionic surfactants显示文摘The massive production and wide use of surfactants have resulted in a large amount of surfactant residuals being discharged into the environment,which could have an impact on arsenic behavior.In the present study,the influence of the anionic surfactant sodium dodecyl benzene sulfonate(SDBS) and nonionic surfactant polyethylene glycol octylphenyl ether(Triton X-100) on arsenic behavior was investigated in batch and column tests.The presence of SDBS and Triton X-100 reduced arsenic retention onto ferrihydrite(FH),enhanced arsenic transport through FH coated sand(FH-sand) columns and promoted arsenic release from the FH surface.With coexisting surfactants in solution,the equilibrium adsorbed amount of arsenic on FH decreased by up to 29.7% and the adsorption rate decreased by up to 52.3%.Pre-coating with surfactants caused a decrease in the adsorbed amount and adsorption rate of arsenic by up to 15.1% and 58.3%,respectively.Because of the adsorption attenuation caused by surfactants,breakthrough of As(Ⅴ) and As(Ⅲ) with SDBS in columns packed with FH-sand was 23.8% and 14.3%faster than that in those without SDBS,respectively.In columns packed with SDBS-coated FH-sand,transport of arsenic was enhanced to a greater extent.Breakthrough of As(Ⅴ) and As(Ⅲ) was 52.4% and 43.8% faster and the cumulative retention amount was 44.5% and 57.3% less than that in pure FH-sand column systems,respectively.Mobilization of arsenic by surfactants increased with the increase of the initial adsorbed amount of arsenic.The cumulative release amount of As(Ⅴ) and As(Ⅲ) from the packed column reached 10.8% and 36.0%,respectively. | Chuan Liang Xianliang Wang Xianjia Peng | 2016 | Journal of Environmental Sciences2016，28，1： | 2 |
| 3 | Adsorption of humic acid onto pillared bentonite 显示文摘 | Xianjia Peng Zhaokun Luan Futai Chen | 2005 | Desalination2005，174，： | 1 |
| 4 | Ceria nanoparticles supported on carbon nanotubes for the removal of arsenate from water显示文摘 | Peng Xianjia Luan Zhaokun Ding Jun | 2005 | Materials Letters2005，59，： | 1 |
| 5 | Ceria nanoparticlessupported on carbon nanotubes for the removal of arsenate fromwater显示文摘 | Peng Xianjia Luan Zhaokun Ding Jun | 2005 | Materials Letters2005，59，4： | 1 |
| 6 | Ccria nanoparticles supported on carbon nanotubes for the removal of arsenate from water 显示文摘 | Peng Xianjia Luan zhaokun Ding jun | 2005 | Materials Letters2005，59，： | 1 |
| 7 | Aqueous stability and mobility of C_(60) complexed by sodium dodecyl benzene sulfonate surfactant显示文摘Surfactant complexation may have significant effects on the environmental behavior of nano-particles.In order to understand the ecological exposure of nano-materials,it is important to determine the stability and mobility of surfactant-complexed nano-materials in aqueous systems.In this study,the aggregation and transport of C_(60) complexed by the surfactant sodium dodecyl benzene sulfonate(SDBS)were investigated.It was found that SDBS-complexed C-_(60) had aζ-potential of-49.5 m V under near-neutral p H conditions and remained stable during an aging period of 15 days.It had a critical coagulation concentration of 550 mmol/L for Na Cl,which was higher than common natural colloids and many kinds of raw nano-materials,and was comparable to those of many kinds of surface-modified nano-materials.SDBS enhanced the stability of C_(60) colloid;however,at the same time,it also enhanced the colloidal particle aggregation rate.Much higher mobility was found for SDBS-complexed C_(60) than C_(60) colloid.Increase in ionic strength,Ca^(2+) concentration or Al^(3+) concentration decreased the mobility.In general,SDBS-complexed C_(60) had high stability and mobility. | Xianjia Peng Yue Yuan Hongyu Wang Chuan Liang | 2016 | Journal of Environmental Sciences2016，28，4： | 1 |
| 8 | Adsorption of 1,2-dichlorobenzene from water to carbon nanotubes 显示文摘 | Peng Xianjia Li Yanhui Luan Zhaokun Di Zechao Wang Hongyu Tian Binghui Jia Zhiping | 2003 | Chemical Physics Letters2003，376，1： | 1 |
| 9 | Montmoril- lonite-Cu( Ⅱ )/Fe(Ⅲ ) oxides magnetic material as adsorbent for removal of humie acid and its thermal regeneration显示文摘 | Peng Xianjia Luan Zhaokun Zhang Hongmei | 2006 | Chemosphere2006，63，2： | 1 |
| 10 | 显示文摘 | Peng Xianjia Li Yanhui Luan Zhaokun | 2003 | Chemical Physics Letters2003，376，： | 1 |
| 11 | Mobilization of arsenic from contaminated sediment by anionic and nonionic surfactants显示文摘The increasing manufacture of surfactants and their wide application in industry,agriculture and household detergents have resulted in large amounts of surfactant residuals being discharged into water and distributed into sediment. Surfactants have the potential to enhance arsenic mobility, leading to risks to the environment and even human beings. In this study, batch and column experiments were conducted to investigate arsenic mobilization from contaminated sediment by the commercial anionic surfactants sodium dodecylbenzenesulfonate(SDBS), sodium dodecyl sulfate(SDS), sodium laureth sulfate(AES)and nonionic surfactants phenyl-polyethylene glycol(Triton X-100) and polyethylene glycol sorbitan monooleate(Tween-80). The ability of surfactants to mobilize arsenic followed the order AES > SDBS > SDS ≈ Triton X-100 > Tween 80. Arsenic mobilization by AES and Triton X-100 increased greatly with the increase of surfactant concentration and p H, while arsenic release by SDBS, SDS and Tween-80 slightly increased. The divalent ion Ca^(2+) caused greater reduction of arsenic mobilization than Na^+. Sequential extraction experiments showed that the main fraction of arsenic mobilized was the specifically adsorbed fraction. Solid phase extraction showed that arsenate(As(V)) was the main species mobilized by surfactants,accounting for 65.05%–77.68% of the total mobilized arsenic. The mobilization of arsenic was positively correlated with the mobilization of iron species. The main fraction of mobilized arsenic was the dissolved fraction, accounting for 70% of total mobilized arsenic. | Chuan Liang Xianjia Peng | 2017 | Journal of Environmental Sciences2017，29，6： | 1 |
| 12 | Release kinetics of vanadium from vanadium titano-magnetite:The effects of pH, dissolved oxygen, temperature and foreign ions显示文摘As part of a broader study of the environmental geochemistry behavior of vanadium(V), the release kinetics of V from the dissolution of natural vanadium titano-magnetite under environmentally relevant conditions was investigated. In both the acidic and basic domains, the V release rate was found to be proportional to fractional powers of hydrogen ion and dissolved oxygen activities. The dependence of the rate on dissolved oxygen can also be described in terms of the Langmuir adsorption model. The empirical rate equation is given by: r= k′α(H^+)~α(Kα(O_2))/(1+Kα(O_2)) where, α = 0.099–0.265, k′ = 3.2 × 10^(-6)–1.7 × 10^(-5), K =2.7 × 10~4–3.9 × 10~4 mol/L in acid solution(pH 4.1), and α =-0.494-(-0.527), k′ = 2.0 × 10~4–2.5 × 10^(-11), and K = 4.1 × 10~3–6.5 × 10~3 mol/L in basic solution(pH 8.8) at 20°C. Based on the effect of temperature on the release rate of V, the activation energies of minerals at p H 8.8 were determined to be 148–235 k J/mol, suggesting that the dissolution of vanadium titano-magnetite is a surface-controlled process. The presence of Na^+, Ca^(2+), Mg^(2+), K^+, NO_3^-, Cl^-, SO_4^(2-)and CO_3^(2-)was found to accelerate the V release rates. This study improves the understanding of both the V pollution risk in some mine areas and the fate of V in the environment. | Xingyun Hu Yuyan Yue Xianjia Peng | 2018 | Journal of Environmental Sciences2018，30，2： | 1 |
| 13 | Aqueous stabil ity of oxidized carbon nanotubes and the precipitation by salts 显示文摘 | Peng Xianjia Jia Jianjun Gong Xuemin | 2009 | Journal of Hazardous Materials2009，165，： | 1 |
| 14 | Adsorption of 1,2-dichlorobenzene from water to carbon nanotubes显示文摘 | PENG Xianjia LI Yanhui LUAN Zhaokun | 2003 | Chemical Physics Let ters2003，376，12： | 1 |
| 15 | Montmorillonite–Cu(II)/Fe(III) oxides magnetic material for removal of cyanobacterial Microcystis aeruginosa and its regeneration显示文摘 | Zhengwen Gao Xianjia Peng Hongmei Zhang Zhaokun Luan Bin Fan | 2009 | Desalination2009，，1： | 1 |
| 16 | Removal of Ni(Ⅱ) from strongly acidic wastewater by chelating precipitation and recovery of NiO from the precipitates显示文摘Strongly acidic wastewater produced in nonferrous metal smelting industries often contains high concentrations of Ni(Ⅱ), which is a valuable metal. In this study, the precipitation of Ni(Ⅱ) from strongly acidic wastewater using sodium dimethyldithiocarbamate(DDTC) as the precipitant was evaluated. The effects of various factors on precipitation were investigated, and the precipitation mechanism was also identified. Finally, the nickel in the precipitates was recovered following a pyrometallurgical method. The results show that, under optimised conditions(DDTC:Ni(Ⅱ) molar ratio = 4:1;temperature = 25 ℃), the Ni(Ⅱ) removal efficiency reached 99.3% after 10 min. In strongly acidic wastewater, the dithiocarbamate group of DDTC can react with Ni(Ⅱ) to form DDTC –Ni precipitates. Further recovery experiments revealed that high-purity Ni O can be obtained by the calcination of DDTC –Ni precipitates, with the nickel recovery efficiency reaching 98.2%. The gas released during the calcination process was composed of NO_(2), CS_(2), H_(2)O, CO_(2), and SO_(2). These results provide a basis for an effective Ni(Ⅱ) recovery method from strongly acidic wastewater. | Xin Yang Xianjia Peng Linghao Kong Xingyun Hu | 2021 | Journal of Environmental Sciences2021，33，6： | 1 |
| 17 | Adsorption of 1,2-dichlorobenzene from water to carbon nanotubes 显示文摘 | Peng Xianjia Li Yanhui Luan Zhaokun | 2003 | Chemical Physical Letters2003，376，： | 1 |
| 18 | Adsorption of fluoride from aqueous solution by graphene显示文摘 | Yanhui Li Pan Zhang Qiuju Du Xianjia Peng Tonghao Liu Zonghua Wang Yanzhi Xia Wei Zhang Kunlin Wang Hongwei Zhu Dehai Wu | 2011 | Journal of Colloid And Interface Science2011，，1： | 1 |
| 19 | Adsorption of 1,2-dichlorobenzene from water to carbon nanotubes显示文摘 | Xianjia Peng Yanhui Li Zhaokun Luan | 2003 | Chemical Physics Letters2003，376，： | 1 |
| 20 | Selective recovery of Cu(II) from strongly acidic wastewater by zinc dimethyldithiocarbamate: Affecting factors, efficiency and mechanism显示文摘The selective recovery of copper from strongly acidic wastewater containing mixed metal ions remains a significant challenge.In this study,a novel reagent zinc dimethyldithiocarbamate(Zn(DMDC)_(2))was developed for the selective removal of Cu(II).The removal efficiency of Cu(II)reached 99.6%after 120 min reaction at 30°C when the mole ratio Zn(DMDC)_(2)/Cu(II)was 1:1.The mechanism investigation indicates that the Cu(DMDC)_(2) products formed as a result of the displacement of Zn(II)from the added Zn(DMDC)_(2) by Cu(II)in wastewater,due to the formation of stronger coordination bonds between Cu(II)and the dithiocarbamate groups of Zn(DMDC)_(2).Subsequently,we put forward an innovative process of resource recovery for strongly acidicwastewater.Firstly,the selective removal of Cu(II)fromactualwastewater using Zn(DMDC)_(2),with a removal efficiency of 99.7%.Secondly,high-value CuO was recovered by calcining the Cu(DMDC)_(2) at 800°C,with a copper recovery efficiency of 98.3%.Moreover,the residual As(III)and Cd(II)were removed by introducing H_(2)S gas,and the purified acidic wastewater was used to dissolve ZnO for preparation of valuable ZnSO_(4)·H_(2)O.The total economic benefit of resource recovery is estimated to be 11.54$/m^(3).Accordingly,this study provides a new route for the resource recovery of the treatment of copper-containing acidic wastewater. | Xin Yang Xingyun Hu Linghao Kong Xianjia Peng | 2023 | Journal of Environmental Sciences2023，，7： | 0 |
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