用壳聚糖作除砷絮凝剂,用絮凝-超滤集成工艺脱除水中微量砷.研究了絮凝和超滤过程中影响砷去除率的多种因素,结果表明,pH为4.6、壳聚糖浓度为0.36 g/L、搅拌功率为8.11×10-2W和沉淀时间为40 min时絮凝效果最佳.超滤操作的压力、膜面流速变化对砷去除率没有明显影响;温度升高,砷去除率有下降趋势.模拟含砷水中,As(Ⅲ)和A5(Ⅴ)含量均约为0.1 mg/L,经过絮凝-超滤后,As(Ⅲ)在水中含量降至0.02 mg/L左右,去除率达到80%;As(V)在水中含量降到0.01 mg/L以内,去除率达到90%以上.还研究了超滤膜的污染情况,探索了清洗超滤膜的方法,结果表明,酸清洗效果较好,可使膜通量恢复达72%以上.
参考文献
| [1] | M.Leist;R.J.Casey;D.Caridi .The management of arsenic wastes: problems and prospects[J].Journal of hazardous materials,2000(1):125-138. |
| [2] | Rama P;Chaudhari S;Khilar KC et al.Removal of ar-senic from water by eletrocogulation[J].CHEMOSPHERE,2004,55:1245-1252. |
| [3] | Eleonora Deschamps;Virginia S.T. Ciminelli;Wolfgang H. Hoell .Removal of As(Ⅲ) and As(Ⅴ) from water using a natural Fe and Mn enriched sample[J].Water research: A journal of the international water association,2005(20):5212-5220. |
| [4] | S.R.Wickramasinghe;Binbing Han;J.Zimbron;Z.Shen;M.N.Karim .Arsenic removal by coagulation and filtration:comparison of groundwaters from the United States and Bangladesh[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2004(3):231-244. |
| [5] | Katsayiannis I A;Zouboulis A I .Application of biological Processes for the removal of arsenic from groindwaters[J].Water Research,2004,38:17-26. |
| [6] | 苑宝玲,李坤林,邢核,吴惠璇.饮用水砷污染治理研究进展[J].环境保护科学,2006(01):17-18,27. |
| [7] | Oqbal J;Kim H J;YangJ S et al.Removal of arsenic from groundwater by miceUar-enhanced ultrafiltration (MEUF)[J].Chemosphere,2007,66(05):970-976. |
| [8] | Shih M C .An overview of arsenic removal by pressure-driven membrane process[J].Desalination,2005,172:85-87. |
| [9] | GANESH GHURYE;DENNIS CLIFFORD;ANTHONY TRIPP .Iron coagulation and direct microfiltration to remove arsenic from groundwater[J].Journal - American Water Works Association,2004(4):143-152. |
| [10] | S.Verbych;M.Bryk;A.Alpatova;G.Chornokur .Ground water treatment by enhanced ultrafiltration[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2005(1/3):237-244. |
| [11] | IVO GEORGIEV LALOVl;ILLIA ILLIEV GUERGINOV;MILKA .TREATMENT OF WASTE WATER FROM DISTILLERIES WITH CHITOSAN[J].Water research: A journal of the international water association,2000(5):1503-1506. |
| [12] | 蒋挺大.甲壳素[M].北京:化学工业出版社,2003:53-59,90-92. |
| [13] | Ergican E;Gecol H;Fuchs A .The effect of co-occur-ring inorganic solutes on the removal of arsenic(Ⅴ) from water using cationic surfactant micelles and an ultrafiltra-tion membrane[J].Desalination,2005,181:9-26. |
| [14] | Gecol H;Ergican E;Fuchs A .Molecular level separation of arsenic (V) from water using cationic surfactant micelles and ultrafiltration membrane[J].Journal of Membrane Science,2004(1):105-119. |
| [15] | Olivier X. Leupin;Stephan J. Hug .Oxidation and removal of arsenic (Ⅲ) from aerated groundwater by filtration through sand and zero-valent iron[J].Water research: A journal of the international water association,2005(9):1729-1740. |
| [16] | 王子瑜;曹恒光 .布朗运动、郎之万方程式、与布朗运动学[J].物理,2005,3(27):456-460. |
| [17] | 苏根利,谢鸿森,丁东业,郭捷,孙樯.高温高压下KCl水溶液中离子示踪扩散系数的确定[J].高压物理学报,2000(04):273-279. |
| [18] | 王志;甄寒菲;王世昌 等.膜过程中防治膜污染强化渗透通量技术进展,(Ⅰ)操作策略[J].膜科学与技术,1999,19:1-5. |
| [19] | 魏永锋,张苏敏,杭超伦,郎惠云.壳聚糖Cu（Ⅱ）配合物的合成及吸附性能[J].西北大学学报（自然科学版）,2005(04):413-415,427. |
| [20] | 刘忠洲,续曙光,李锁定.微滤、超滤过程中的膜污染与清洗[J].水处理技术,1997(04):187. |
| [21] | 刘茉娥.超滤膜污染机理的研究及控制[J].水处理技术,1989(03):163. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%