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Adsorption of surfactants onto acrylic ester resins with different pore size distribution

Science china Chemistry 2006年第5期49卷 445-453页

作者： YANG Weiben1,2,3.LI Aimin1,3.CAI Jianguo1,3.MENG Guanhua1,3.& ZHANG Quanxing1,3.1. State Key Laboratory of Pollution control and resource reuse,School of the Environment,{3. University,{3. 210093.china 2. {3. College of Chemical technology,{3. 210048,china 3. jiangsu engineering & technology {13. Center for organic toxicant control and resource reuse,nanjing 2.003.,china State Key Laboratory of Pollution control and resource reuse School of the Environment Nanjing University Nanjing China nanjing College of Chemical technology Nanjing China jiangsu engineering & technology {3. Center for organic toxicant control and resource reuse Nanjing China

In this study, a series of acrylic ester resins with different pore size distribution were prepared successfully by varying the type and the amount of pore-forming agents. In order to inves-tigate the adsorption behavior and mechanism of surfactants on acrylic ester resins, three kinds of surfactants were utilized as adsorbates that were sodium 6-dodecyl benzenesulfonate (6-NaDBS), sodium 1-dodecyl benzene sulfonate (1-NaDBS) and sodium 1-dodecyl sulfonate, respectively. It was observed that the surface area was available in a particular pore size and an appropriate pore size of resins appeared to be more important for the adsorption of surfactants. As compared to commercial acrylic ester resins XAD-7 and HP2MG, 50# and 3.# resins exhibited more excellent adsorption properties toward 1-NaDBS and 6-NaDBS. The experimental equilibrium data were fitted to the Langmuir, and double-Langmuir models. Two models provided very good fittings for all resins over the temperature range studied. The investigation indicated that electrostatic attraction and hydrogen bond between resins and surfactants were the main forces and had an obvious effect on adsorption proc-ess.

关键词： acrylic ester resin, surfactant, adsorption, pore size distribution, isotherm.

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RECOVERY OF p-AMINOPHENOL (PAP) FROM AQUEOUS SOLUTION BY HYPER-CROSS-LINKED RESIN AND ITS USE FOR WASTEWATER TREATMENT

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Chinese Journal of Reactive Polymers 2008年第Z1期 18-28页

作者： ZHANG Haiyun1,2 LI Aimin1,3.1. School of the Environment, and State Key Laboratory of Pollution control and resource reuse, {3. University, {3. 210093. china 2. Department of the Environmental engineering, {3. Institute of technology, {3. 211167, china 3. engineering technology {13. Center of organic Pollutants control and resource reuse of jiangsu Province, nanjing 2.003., china

p-Aminophenol （PAP）, a typical amphoteric compound, has been widely used as raw chemical material and important intermediate in various fields. To study on the recovery of PAP, an experimental comparison of the adsorption and desorption properties of PAP onto three types of hyper-cross-linked resins in aqueous solutions was performed. This paper focuses on the static equilibrium adsorption and desorption behaviors, the adsorption thermodynamics, the column dynamic adsorption and desorption, and other influencing factors of adsorption, such as temperature and pH values. All the isothermal data fit well to the Freundlich model. The capacity of equilibrium adsorption for PAP on NG-10 is the highest within the temperature range 288K3.8K,which may greatly contribute to the advantage in specific surface area, especially the micropore area, of the adsorbent. While in the desorption experiments, NG-9 achieved relative well regeneration efficiency whether by ethanol or by 4% hydrochloric acid. Furthermore, the results of column tests and field applications were also proved that NG-9 was an effective sorbent for the reclamation PAP from wastewater.

关键词： Adsorption p-Aminophenol Hyper-cross-linked resin Recovery.

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Chemical and Microbiological Parameters of Paddy Soil Quality as Affected by Different Nutrient and Water Regimes

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Pedosphere 2005年第3期15卷 369-378页

作者： YANGChang-Ming YANGLin-Zhang YANTing-Mei StateKeyLab.ofPollutioncontrolandresourcereuse CollegeofEnvironmentalScienceandEngineeringTongjiUniversityShanghai200092（China） InstituteofSoilScience ChineseAcademyofSciencesP.O.Box821Nanjing210008（China）

A field experiment was conducted from 1999 to 2002 to compare and evaluate the effects of nutrient and water regimes on paddy soil quality by investigating soil chemical and microbiological parameters. Four nutrient regimes, a control, chemical fertilizers only (CF), chemical fertilizers with swine manure (SM), and chemical fertilizers with wheat straw (WS), and two soil moisture regimes, continuous waterlogging (CWL) and alternate wetting and drying (AWD), were investigated. With SM and WS total organic carbon and total nitrogen in the paddy soil were significantly higher (P organic amendments was observed in the soil light fraction organic C (LFOC), water-soluble carbohydrates (WSC), and water-soluble organic C (WSOC). CWL, in particular when swine manure was incorporated into the paddy soil, markedly decreased soil redox potential (Eh) and increased total active reducing substances (ARS). Meanwhile, as compared to CF, SM and WS significantly (P organic manure was incorporated into paddy soil.

关键词： biological index of fertility nutrient regimes paddy soil quality water regimes

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Nitrogen Removal Mechanism of Fresh Leachate Treatment Using Sequencing Aged Refuse Bioreactors

Nitrogen Removal Mechanism of Fresh Leachate Treatment Using...

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2009 International Conference on Environmental Science and Information Application technology

作者： Yingjie Sun1 Xiaojie Sun2 Huixia Wang1 Youcai Zhao3.1 Institute of Environment and Municipal engineering Qingdao Technological University Qingdao 26603. china 2 Department of Environmental Science and engineering Tsinghua University Beijing 100084 china 3.The State Key Laboratory of Pollution control and resource reuse Tongji University Shanghai 200092 china

In this study,the aged refuse excavated from a 10-year old closed landfill compartment at Shanghai Laogang Refuse Landfill was used as the substrate in a sequencing aged refuse bioreactor process for treatment of fresh landfill leachate which sampled from the balance tank in the same ***,screened aged refuse with a diameter less than 8 mm was used as bio-filtration material in the two round shaped bioreactor with an inner diameter of 40 cm and a height of 13. *** fresh leachate with initial CODCr,TN and NH3.N concentrations of 11000～15000,13.0～1770 and 11200～1650 mg/L,respectively,was introduced into the *** corresponding concentrations in the effluent were reduced to below 3.0,about 250,and below 15mg/L,*** sequencing aged refuse process is effective in the fresh leachate treatment,the removal efficiency of COD and TN removal is about 90% and 80% respectively,and the ammonia nitrogen transformation efficiency is about 99.5%.The treatment mechanism of nitrogen removal was *** the process,the nitrogen removal is mainly due to the simultaneous nitrification and denitrification in both *** nitrate nitrogen denitrification exists in bioreactor 1,but is not the main nitrogen removal pathway,which is different from the nitrogen removal mechanism in aged leachate treatment.

关键词： Total nitrogen Nitrogen removal mechanism Sequencing aged refuse bioreactors Aged Refuse Fresh leachate

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Extraction of Cadmium from Sewage Sludge Using Polyepoxysuccinic Acid

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Pedosphere 2009年第2期19卷 137-142页

作者： ZHU Zhi-Liang ZHANG Li-Hua ZHANG Hua QIU Yan-Ling ZHANG Rong-Hua ZHAO Jian-Fu State Key Laboratory of Pollution control and resource reuse Tongji University Shanghai 200092 China Chemistry and Biology engineering Department Sanming College Sanming 365004 China

Polyepoxysuccinic acid （PESA）, as an environmental benign biodegradable chelant, was used to remove heavy metals from the sewage sludge of Shanghai Taopu Wastewater Treatment Plant. The extraction of cadmium （Cd） from sewage sludge using aqueous solution of PESA was studied. It was found that PESA was capable of extracting Cd from the sludge, and the extraction efficiency was dependent on both pH and the concentration of the chelating reagent. The extraction efficiency decreased gradually with increasing of pH, whereas the dependency on pH decreased as the concentration of PESA increased. In the case of the high PESA to total metal ratio, e.g., 10：1, the extraction efficiency reached above 70% within the pH range from 1 to 7. The highest extraction efficiency obtained in tbe experiment was 78%. By comparing the contents of the heavy metals in sewage sludge before and after the extraction, it was found that the extracted Cd came mainly from the four fractions： acid-soluble, reducible, oxidizable, and water-soluble fractions.

关键词： cadmium extraction PESA sewage sludge

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Characteristics of Bathing Wastewater and Its Reclamation with Anoxic-Aerobic Membrane Bioreactor （AO-MBR） Process

Characteristics of Bathing Wastewater and Its Reclamation wi...

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2012年环境污染与大众健康学术会议

作者： Mohamed Ahmed Ahmed Eid, Rongchang Wang, Jianfu Zhao State Key Laboratory of Pollution control and resource reuse Key Laboratory of Yangtze Aquatic Environment MOE, College of Environmental Science and {3., Tongji University, Shanghai 200092, china

Membrane Bioreactor （MBR） wastewater treatment technology is being successfully used for treating wastewater. The aims of this research were to investigate the performance of a full-scale anoxic-aerobic MBR （AO-MBR） for treating bathing wastewater and to evaluate the feasibility of using the treated wastewater. To achieve these goals, bathing wastewater was treated by an AO-MBR system with a capacity of 120 m 3.d -1 . The water quality of influent and effluent were monitored and evaluated for different reuse purposes. The obtained results showed that the use of AO-MBR for wastewater treatment is sufficient to remove chemical oxygen demand （COD）, nitrite （NO - 2 -H）, ammonium （NH 4 + -N） and turbidity with average values of 92.0%, 89.66%, 88.1 and 99.21%, respectively. Moreover, the values of PH, Total dissolved solids （TDS）, and dissolved oxygen （DO） meet the Chinese’s water quality standards for reclamation （GB/T18920-2002, GB/T18921-2002）. For the AO-MBR performance, the removal efficiencies of the study parameters were stable during the experimental period. We concluded that AO-MBR is a suitable and reliable process to treat bathing wastewater for water reuse.

关键词： Bathing wastewater membrane bioreactor AO-MBR system recycling irrigation

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氧化剂在低浓度难降解垃圾渗滤液中的试验研究

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苏州科技学院学报（工程技术版） 2003年第1期16卷 30-35页

作者：舒慧赵由才同济大学污染控制与资源化研究国家重点实验室上海200092

在生物法处理的基础上,利用高锰酸钾和次氯酸钠氧化剂深度处理垃圾渗滤液。所取渗滤液的CODCr约为600 mg/L,色度为200倍。加入25 mL/L次氯酸钠后,渗滤液的CODCr降为23.mg/L,色度降为1倍。加人16 mL/L次氯酸钠,渗滤液的CODCr达到国家污... 详细信息

在生物法处理的基础上,利用高锰酸钾和次氯酸钠氧化剂深度处理垃圾渗滤液。所取渗滤液的CODCr约为600 mg/L,色度为200倍。加入25 mL/L次氯酸钠后,渗滤液的CODCr降为23.mg/L,色度降为1倍。加人16 mL/L次氯酸钠,渗滤液的CODCr达到国家污水排放二级标准。高锰酸钾对有机物的去除效果相对较低,加入500 mg/L的高锰酸钾,渗滤液的CODCr降为460 mg/L,色度降为25倍。另外,高锰酸钾和次氯酸钠氧化剂深度处理低浓度难降解垃圾渗滤液产生的污泥量均很小。

关键词：垃圾填埋处理氧化剂垃圾渗滤液次氯酸钠高锰酸钾化学降解

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