给水厂残泥-海藻酸钠胶珠对磷的吸附特性
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摘要
为解决给水厂残泥(WTR)作为磷吸附材料用于水处理工艺时存在的沉降性能差和易堵塞等问题,本研究利用海藻酸钠包埋法制备了给水厂残泥-海藻酸钠(WTR-SA)胶珠,考察了WTR-SA胶珠对磷的吸附与解吸附特征.研究结果表明WTR-SA胶珠对磷的动力学吸附过程符合准二级动力学方程(R~2=0.9957),Freundlich方程能较好描述其对磷的等温吸附过程(R~2=0.9907),Langmuir方程模拟得到的磷饱和吸附量为1.878 mg·g~(-1);随着溶液pH的升高,WTR-SA胶珠对磷的吸附量呈现先上升后下降的趋势,在pH5时吸附量最高;WTR-SA胶珠对磷的吸附稳定,在接近饱和吸附量条件下,磷的解吸率仅为0.72%;磷分级提取结果表明磷主要以稳定的铝结合态、铁结合态和钙结合态存在于WTR-SA胶珠中,3种赋存形态含量占比分别为43.2%、22.7%和21.3%.
In order to solve the problems of granular drinking water treatment residuals(WTR) in wastewater treatment application, globular WTR-sodium alginate(WTR-SA) beads were prepared using the sodium alginate embedding method, and the adsorption characteristics of phosphorus on WTR-SA beads was examined in this study. Results showed that the kinetics of phosphorus adsorption on WTR-SA beads followed pseudo-second-order kinetic model.(R~2=0.9957), and its adsorption isotherm was well described by Freundlich equation(R~2=0.9907).The maximum adsorption amount of phosphorus simulated by the Langmuir equation was 1.88 mg·g~(-1). With the increase of solution pH from 3 to 11, the amount of phosphorus adsorption in WTR-SA beads showed a trend of increasing first and then decreasing. The optimal initial pH value for phosphate adsorption was 5. The desorption rate of phosphorus was only 0.72% under the condition of near saturation adsorption. Phosphorus fractionation results showed that phosphorus existed mainly in Al-bound, Fe-bound and Ca-bound forms, accounting for 43.2%, 22.7%, and 21.3%, respectively.
In order to solve the problems of granular drinking water treatment residuals(WTR) in wastewater treatment application, globular WTR-sodium alginate(WTR-SA) beads were prepared using the sodium alginate embedding method, and the adsorption characteristics of phosphorus on WTR-SA beads was examined in this study. Results showed that the kinetics of phosphorus adsorption on WTR-SA beads followed pseudo-second-order kinetic model.(R~2=0.9957), and its adsorption isotherm was well described by Freundlich equation(R~2=0.9907).The maximum adsorption amount of phosphorus simulated by the Langmuir equation was 1.88 mg·g~(-1). With the increase of solution pH from 3 to 11, the amount of phosphorus adsorption in WTR-SA beads showed a trend of increasing first and then decreasing. The optimal initial pH value for phosphate adsorption was 5. The desorption rate of phosphorus was only 0.72% under the condition of near saturation adsorption. Phosphorus fractionation results showed that phosphorus existed mainly in Al-bound, Fe-bound and Ca-bound forms, accounting for 43.2%, 22.7%, and 21.3%, respectively.
引文
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[2] ABO-EL-ENEIN S A, SHEBLA, EL-DAHAB S A A. Drinking water treatment sludge as an efficient adsorbent for heavy metals removal[J]. Applied Clay Science, 2017, 146:343-349.
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[8] SISWOYO E, MIHARA Y, TANAKA S. Determination of key components and adsorption capacity of a low cost adsorbent based on sludge of drinking water treatment plant to adsorb cadmium ion in water[J]. Applied Clay Science, 2014, 97-98(8):146-152.
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[12] 孟盼盼.陶粒基人工湿地处理生活污水及新型陶粒的开发研究[D].济南:山东大学,2015.MENG P P.Study on treatment of domestic wastewater and new type of ceramsite with ceramic-based constructed wetland[D].Ji′nan: Shandong University, 2015 (in Chinese).
[13] 郑育毅,余育方,李妍,等.自来水厂污泥制得陶粒对污水中磷和氨氮的吸附[J].环境工程学报,2015,9(2):756-762.ZHENG Y Y,YU Y F,LI Y,et al.The adsorption of phosphorous and ammonia nitrogen in sewage by using ceramic sludge from waterworks[J].Techniques and Equipment for Environmental Pollution Control,2015,9(2):756-762 (in Chinese).
[14] 高思佳,王昌辉,裴元生.热活化和酸活化给水处理厂废弃铁铝泥的吸磷效果[J].环境科学学报,2012,32(3):606-611.GAO S J,WANG C H,PEI Y S. Effects of phosphate removal by thermal- and acid-activated ferric and alum water treatment residuals[J]. Acta Scientiae Circumstantiae, 2012, 32(3): 606-611 (in Chinese).
[15] PAI S L, HSU Y L, CHONG N M, et al. Continuous degradation of phenol by Rhodococcus sp. immobilized on granular activated carbon and in calcium alginate[J]. Bioresource Technology, 1995, 51(1): 37-42.
[16] 陈微微,徐芳,李龙海.传统、冷冻、微波干燥条件制备海藻酸钠/火山灰复合微球及除磷效率研究[J].化学世界,2012,53(5):257-260,271,281.CHEN W W,XU F,LI H L. Traditional drying,freeze drying,microwave-assiste drying conditionsfor dried sodium alginate/tephra composites and their phosphate adsorption behaviors[J].Chemical World, 2012, 53(5): 257,260,271,281(in Chinese).
[17] 谢新宇.包埋粉末活性炭的高分子凝胶球对无机磷的去除效率及吸附特性[J].河北科技师范学院学报,2011,25(2):22-26,55.XIE X Y. Removal efficiency and adsorption characteristics of polymeric gel ball embedded with powdered activated carbon for inorganic phosphorus[J].Journal of Hebei Normal University of Science & Technology,2011,25(2):22-26,55(in Chinese).
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[19] RYDIN E. Potentially mobile phosphorus in Lake Erken sediment[J]. Water Research, 2000, 34(7): 2037-2042.
[20] RUBAN V, LOPEZ-SANCHEZ J F, PARDO P, et al. Selection and evaluation of sequential extraction procedures for the determination of phosphorus forms in lake sediment[J]. Journal of Environmental Monitoring, 1999, 1(1): 51-56.
[21] 李兆欣,周雪,黄炳彬,等. 碳化缓释除磷填料的制备与吸附特性分析[J]. 环境科学与技术, 2017, 40(5): 49-53. LI Z X, ZHOU X, HUANG B B, et al. Preparation and adsorption characteristics analysis on carbonized controlled-release substance of phosphorus removal[J]. Environmental Science & Technology,2017,40(5):49-53(in Chinese).
[22] 李慧,周易勇,余能智.锦江河沉积物磷形态与吸附行为及磷释放风险[J].水生态学杂志,2017,38(4):27-35.LI H, ZHOU Y Y, Yu N Z. Determination of phosphorus forms and adsorption behavior of sediments in jinjiang river and the risk of phosphorus release[J]. Journal of Hydroecology, 2017, 38(4): 27-35 (in Chinese).
[23] 尹丽,邹海燕,费陶,等.牛粪源生物炭对水中甲基紫的吸附动力学和热力学[J].环境化学,2017,36(12):2650-2657.YIN L, ZOU H Y, FEI T, et al. Thermodynamics and kinetics of sorption of methyl violet on cow-manure-derived biochar in an aqueous solution[J]. Environmental Chemistry, 2017, 36(12): 2650-2657 (in Chinese).
[24] 唐登勇,胡洁丽,胥瑞晨,等.芦苇生物炭对水中铅的吸附特性[J].环境化学,2017,36(9):1987-1996.TANG D Y, HU L J, XU R C, et al. Adsorption of lead onto reed biochar in aqueous solution[J]. Environmental Chemistry,2017,36(9):1987-1996 (in Chinese).
[25] WANG S, YI W, YANG S, et al. Effects of light fraction organic matter removal on phosphate adsorption by lake sediments[J]. Applied Geochemistry, 2011, 26(3): 286-292.
[26] 黄柱坚,朱子骜,吴学深,等.皇竹草生物炭的结构特征及对重金属吸附作用机制[J].环境化学,2016,35(4):766-772.HUANG Z J,ZHU Z,WU X S,et al.Adsorption of heavy metals by biochar derived from pennisetum sinese roxb[J]. Environmental Chemistry,2016,35(4): 766-772 (in Chinese).
[27] WEI X, VIADERO R C, BHOJAPPA S. Phosphorus removal by acid mine drainage sludge from secondary effluents of municipal wastewater treatment plants[J]. Water Research, 2008, 42(13): 3275-3284.
[28] ?ZACAR M. Adsorption of phosphate from aqueous solution onto alunite[J]. Chemosphere,2003,51(4): 321-327.
[29] YANG Y,ZHAO Y Q,BABATUNDE A O, et al. Characteristics and mechanisms of phosphate adsorption on dewatered alum sludge[J]. Separation and Purification Technology,2006,51(2): 193-200.
[30] 宋雅然,魏燕富,刘冬,等.纳米氧化铝/氧化锰-硅藻土复合物对磷酸根阴离子的吸附[J].环境化学,2017,36(10):2265-2273.SONG Y R, WEI Y F, LIU D, et al. Adsorption of phosphate anion by nanosized aluminum oxide/manganese oxide-diatomite Nanocomposites[J]. Environmental Chemistry, 2017, 36(10): 2265-2273 (in Chinese).
[31] 王昌辉,裴元生.给水处理厂废弃铁铝泥对正磷酸盐的吸附特征[J].环境科学,2011,32(8):2371-2377.WANG C H, PEI Y S. Characteristics of orthophosphate adsorption on ferric-alum residuals (FARs) from drinking water treatment plant [J]. Environmental Science, 2011, 32(8):2371-2377 (in Chinese).
[32] PENG J, WANG B, SONG Y, et al. Adsorption and release of phosphorus in the surface sediment of a wastewater stabilization pond[J]. Ecological Engineering, 2007,31(2): 92-97.
[33] XIONG W, PENG J. Development and characterization of ferrihydrite-modified diatomite as a phosphorus adsorbent[J]. Water Research,2008,42(19): 4869-4877.
[34] RYDIN E, HUSER B, WELCH E B. Amount of phosphorus inactivated by alum treatments in Washington lakes[J]. Limnology and Oceanography,2000,45(1): 226-230.
[35] 万正芬,张学庆,卢少勇.19种人工湿地填料对磷吸附解吸效果研究[J].水处理技术,2015,41(4):35-39,44.WAN Z F, ZHANG X Q, LU S Y. The adsorption and Desorption of Phosphorus by nineteen construct wetland substrates[J]. Technology of Water Treatment, 2015, 41(4):35-39,44 (in Chinese).
[2] ABO-EL-ENEIN S A, SHEBLA, EL-DAHAB S A A. Drinking water treatment sludge as an efficient adsorbent for heavy metals removal[J]. Applied Clay Science, 2017, 146:343-349.
[3] 孟令友.给水污泥中硅、铝和铁的回收及其衍生纳米材料的制备[D].哈尔滨:黑龙江大学,2015.MENG L Y. Recovery of silicon,aluminum and iron in water sludge and preparation of derived nanomaterials[D]. Harbin: Heilongjiang University, 2015 (in Chinese).
[4] 任伯帜,田胜海.城市给水厂给水污泥用于烧制粉煤灰-粘土砖的试验[J].城市环境与城市生态,2003,16(5):13-15.REN B Z,TIAN S H.Experimental study of sintering brick with sludge of the urban water supply plant and fly-ash clay[J].Urban Environment and Urban Ecology, 2003,16(5):13-15 (in Chinese).
[5] 高思佳,王昌辉,裴元生.pH对活化前后废弃铁铝泥吸附不同种磷动力学的影响[J].环境工程学报,2013,7(9):3263-3269.GAO S J,WANG C H,PEI Y S.Effect of pH on adsorption kinetics of different phosphate species by raw and activated ferric-alum water treatment residuals[J]. Journal of Environmental Engineering, 2013, 7(9): 3263-3269(in Chinese).
[6] 帖靖玺,赵莉,张仙娥,净水厂污泥的磷吸附特性研究[J].环境科学与技术,2009,32(6):149-151,164.TIE J X,ZHAO L,ZHANG X E,Phosphorus adsorption characteristics of waterworks sludge[J]. Environmental Science and Technology, 2009, 32(6): 149-151,164 (in Chinese).
[7] 任新,崔崇威,许铁夫,等.净水厂污泥对水中Cr(3+)的吸附去除研究[J].安全与环境学报,2013,13(6):4-20.REN X,CUI C W,XU T F, et al. Adsorption removal of trivalent chromium from sewage by drinking water treatment sludge[J]. Journal of Safety and Environment,2013,13(6):14-20 (in Chinese).
[8] SISWOYO E, MIHARA Y, TANAKA S. Determination of key components and adsorption capacity of a low cost adsorbent based on sludge of drinking water treatment plant to adsorb cadmium ion in water[J]. Applied Clay Science, 2014, 97-98(8):146-152.
[9] MORTULA M M, GAGNON G A. Alum residuals as a low technology for phosphorus removal from aquaculture processing water[J]. Aquacultural Engineering, 2007, 36(3): 233-238.
[10] TITSHALL L W, HUGHES J C. Characterisation of some South African water treatment residues and implications for land application[J]. Water SA, 2005, 31(3): 299-308.
[11] BAI L, WANG C, PEI Y, et al. Reuse of drinking water treatment residuals in a continuous stirred tank reactor for phosphate removal from urban wastewater.[J]. Environmental Technology, 2014, 35(21):2752-2759.
[12] 孟盼盼.陶粒基人工湿地处理生活污水及新型陶粒的开发研究[D].济南:山东大学,2015.MENG P P.Study on treatment of domestic wastewater and new type of ceramsite with ceramic-based constructed wetland[D].Ji′nan: Shandong University, 2015 (in Chinese).
[13] 郑育毅,余育方,李妍,等.自来水厂污泥制得陶粒对污水中磷和氨氮的吸附[J].环境工程学报,2015,9(2):756-762.ZHENG Y Y,YU Y F,LI Y,et al.The adsorption of phosphorous and ammonia nitrogen in sewage by using ceramic sludge from waterworks[J].Techniques and Equipment for Environmental Pollution Control,2015,9(2):756-762 (in Chinese).
[14] 高思佳,王昌辉,裴元生.热活化和酸活化给水处理厂废弃铁铝泥的吸磷效果[J].环境科学学报,2012,32(3):606-611.GAO S J,WANG C H,PEI Y S. Effects of phosphate removal by thermal- and acid-activated ferric and alum water treatment residuals[J]. Acta Scientiae Circumstantiae, 2012, 32(3): 606-611 (in Chinese).
[15] PAI S L, HSU Y L, CHONG N M, et al. Continuous degradation of phenol by Rhodococcus sp. immobilized on granular activated carbon and in calcium alginate[J]. Bioresource Technology, 1995, 51(1): 37-42.
[16] 陈微微,徐芳,李龙海.传统、冷冻、微波干燥条件制备海藻酸钠/火山灰复合微球及除磷效率研究[J].化学世界,2012,53(5):257-260,271,281.CHEN W W,XU F,LI H L. Traditional drying,freeze drying,microwave-assiste drying conditionsfor dried sodium alginate/tephra composites and their phosphate adsorption behaviors[J].Chemical World, 2012, 53(5): 257,260,271,281(in Chinese).
[17] 谢新宇.包埋粉末活性炭的高分子凝胶球对无机磷的去除效率及吸附特性[J].河北科技师范学院学报,2011,25(2):22-26,55.XIE X Y. Removal efficiency and adsorption characteristics of polymeric gel ball embedded with powdered activated carbon for inorganic phosphorus[J].Journal of Hebei Normal University of Science & Technology,2011,25(2):22-26,55(in Chinese).
[18] 国家环境保护总局《水和废水监测分析方法》编委会. 水和废水监测分析方法 (第四版) [M]. 北京: 中国环境科学出版社, 2002.State Environmental Protection Administration,”Water and wastewater monitoring and analysis methods”, Editorial Board. Water and wastewater monitoring and analysis methods, (Fourth Edition) [M]. Beijing: China Environmental Science Press,2002(in Chinese).
[19] RYDIN E. Potentially mobile phosphorus in Lake Erken sediment[J]. Water Research, 2000, 34(7): 2037-2042.
[20] RUBAN V, LOPEZ-SANCHEZ J F, PARDO P, et al. Selection and evaluation of sequential extraction procedures for the determination of phosphorus forms in lake sediment[J]. Journal of Environmental Monitoring, 1999, 1(1): 51-56.
[21] 李兆欣,周雪,黄炳彬,等. 碳化缓释除磷填料的制备与吸附特性分析[J]. 环境科学与技术, 2017, 40(5): 49-53. LI Z X, ZHOU X, HUANG B B, et al. Preparation and adsorption characteristics analysis on carbonized controlled-release substance of phosphorus removal[J]. Environmental Science & Technology,2017,40(5):49-53(in Chinese).
[22] 李慧,周易勇,余能智.锦江河沉积物磷形态与吸附行为及磷释放风险[J].水生态学杂志,2017,38(4):27-35.LI H, ZHOU Y Y, Yu N Z. Determination of phosphorus forms and adsorption behavior of sediments in jinjiang river and the risk of phosphorus release[J]. Journal of Hydroecology, 2017, 38(4): 27-35 (in Chinese).
[23] 尹丽,邹海燕,费陶,等.牛粪源生物炭对水中甲基紫的吸附动力学和热力学[J].环境化学,2017,36(12):2650-2657.YIN L, ZOU H Y, FEI T, et al. Thermodynamics and kinetics of sorption of methyl violet on cow-manure-derived biochar in an aqueous solution[J]. Environmental Chemistry, 2017, 36(12): 2650-2657 (in Chinese).
[24] 唐登勇,胡洁丽,胥瑞晨,等.芦苇生物炭对水中铅的吸附特性[J].环境化学,2017,36(9):1987-1996.TANG D Y, HU L J, XU R C, et al. Adsorption of lead onto reed biochar in aqueous solution[J]. Environmental Chemistry,2017,36(9):1987-1996 (in Chinese).
[25] WANG S, YI W, YANG S, et al. Effects of light fraction organic matter removal on phosphate adsorption by lake sediments[J]. Applied Geochemistry, 2011, 26(3): 286-292.
[26] 黄柱坚,朱子骜,吴学深,等.皇竹草生物炭的结构特征及对重金属吸附作用机制[J].环境化学,2016,35(4):766-772.HUANG Z J,ZHU Z,WU X S,et al.Adsorption of heavy metals by biochar derived from pennisetum sinese roxb[J]. Environmental Chemistry,2016,35(4): 766-772 (in Chinese).
[27] WEI X, VIADERO R C, BHOJAPPA S. Phosphorus removal by acid mine drainage sludge from secondary effluents of municipal wastewater treatment plants[J]. Water Research, 2008, 42(13): 3275-3284.
[28] ?ZACAR M. Adsorption of phosphate from aqueous solution onto alunite[J]. Chemosphere,2003,51(4): 321-327.
[29] YANG Y,ZHAO Y Q,BABATUNDE A O, et al. Characteristics and mechanisms of phosphate adsorption on dewatered alum sludge[J]. Separation and Purification Technology,2006,51(2): 193-200.
[30] 宋雅然,魏燕富,刘冬,等.纳米氧化铝/氧化锰-硅藻土复合物对磷酸根阴离子的吸附[J].环境化学,2017,36(10):2265-2273.SONG Y R, WEI Y F, LIU D, et al. Adsorption of phosphate anion by nanosized aluminum oxide/manganese oxide-diatomite Nanocomposites[J]. Environmental Chemistry, 2017, 36(10): 2265-2273 (in Chinese).
[31] 王昌辉,裴元生.给水处理厂废弃铁铝泥对正磷酸盐的吸附特征[J].环境科学,2011,32(8):2371-2377.WANG C H, PEI Y S. Characteristics of orthophosphate adsorption on ferric-alum residuals (FARs) from drinking water treatment plant [J]. Environmental Science, 2011, 32(8):2371-2377 (in Chinese).
[32] PENG J, WANG B, SONG Y, et al. Adsorption and release of phosphorus in the surface sediment of a wastewater stabilization pond[J]. Ecological Engineering, 2007,31(2): 92-97.
[33] XIONG W, PENG J. Development and characterization of ferrihydrite-modified diatomite as a phosphorus adsorbent[J]. Water Research,2008,42(19): 4869-4877.
[34] RYDIN E, HUSER B, WELCH E B. Amount of phosphorus inactivated by alum treatments in Washington lakes[J]. Limnology and Oceanography,2000,45(1): 226-230.
[35] 万正芬,张学庆,卢少勇.19种人工湿地填料对磷吸附解吸效果研究[J].水处理技术,2015,41(4):35-39,44.WAN Z F, ZHANG X Q, LU S Y. The adsorption and Desorption of Phosphorus by nineteen construct wetland substrates[J]. Technology of Water Treatment, 2015, 41(4):35-39,44 (in Chinese).
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