| Environmental Science |
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| Study on stability and health of mineralizerd reverse osmosis desalted permeat |
| WU Yunxia, ZHAO Dan, CHEN Shasha, ZHANG Ping, YANG Yueping |
| College of Environment and Resource Sciences, Zhejiang University,Hangzhou 310058,China |
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Abstract Due to the low mineral content and poor stability of reverse osmosis desalted water, the water quality should be improved by adding mineralizer. In order to know the optimum dosage of NaHCO3 and CaCl2, the relationship between the concentration of NaHCO3 and CaCl2 and Ryznar stability index,Calcium carbonate precipitation potential, Larson index and oxidation-reduction potential were studied. The results show that R.S.I. value decreases(approaches to 6~7) with the increase of the dosage of NaHCO3 from 50 to 90 mg·L－1, and then increases (deviation from the range of 6~7) with dosage of NaHCO3 from 90 to 110 mg·L－1, indicating that water stability becomes better and then becomes worse， respectively. CCPP value decreases with the increase of dosage of NaHCO3, when water quality stability changes from precipitation tendency to corrosion tendency. When the concentration of NaHCO3 is high than 70 mg·L－1, CCPP value levels off, so does the water stability. With the increase of the amount of NaHCO3, LR decreases and water stability gets better. With the increase of the amount of NaHCO3, ORP firstly decreases and then begins to level off when the amount of NaHCO3 reaches 90 mg·L－1, which means that the health of water increases firstly and then levels off. Therefore， the appropriate amount of NaHCO3 is 90 mg·L－1. R.S.I. and CCPP value decrease and water stability decreases with the increase of the dosage of CaCl2. LR value increases with the increase of the dosage of CaCl2, meaning that water stalibility becomes worse. With the increase of the amount of CaCl2, ORP increases，which means that the health of water decreases. Thus the appropriate amount of CaCl2 is approximately 20 mg·L－1 .
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Received: 23 October 2018
Published: 25 January 2020
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Corresponding Authors:
yyuep@zju.edu.cn.
E-mail: 740114808@qq.com.
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Cite this article:
WU Yunxia, ZHAO Dan, CHEN Shasha, ZHANG Ping, YANG Yueping. Study on stability and health of mineralizerd reverse osmosis desalted permeat. Journal of Zhejiang University (Science Edition), 2020, 47(1): 101-106.
URL:
https://www.zjujournals.com/sci/EN/Y2020/V47/I1/101
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反渗透淡化水调质稳定性及健康性实验研究
反渗透淡化水因矿物质含量低、稳定性差，需进行调质以改善水质。通过研究调质后水体碳酸钙沉淀势CCPP、Ryznar稳定指数R.S.I.、拉森指数LR、氧化还原电位ORP等指标与调质剂(NaHCO3、CaCl2)投加量间的关系，为反渗透淡化水调质剂投加剂量提供依据。研究表明：NaHCO3为50 ~90 mg·L-1时,随着投加量的增加，R.S.I.降低（趋近于6.0~7.0），水质稳定性改善，NaHCO3为90~110 mg·L-1时，随着投加量的增加，R.S.I.升高（偏离了6.0~7.0），水质稳定性变差；随着NaHCO3投加量的增加，CCPP降低，水质由沉淀倾向变为腐蚀倾向，当NaHCO3投加量达到70 mg·L-1时，CCPP趋于稳定，水质稳定；随着NaHCO3投加量的继续增加，LR降低，水质稳定性改善,而ORP降低，当NaHCO3投加量达到90 mg·L-1时，ORP趋于平缓。建议NaHCO3投加量为90 mg·L-1。随着Ca2+投加量的增加，R.S.I.、CCPP降低，水体稳定性变差；CaCl2投加量增加，LR增加，水质稳定性变差，ORP增大，水质健康性变差。建议CaCl2投加量为20 mg·L-1。
关键词：
海水淡化水,
调质,
稳定性,
健康性,
饮用水
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1 国家海洋局 . 2016年全国海水利用报告[R]. 北京：国家海洋局，2017-07-16. State Oceanic Administration . 2016 National Sea Water Utilization Report[R]. Beijing:State Oceanic Administration,2017-07-16.
2 杨晓雄 .海水淡化水饮用典型地区水质监测与居民健康现状调查研究[D]. 北京：中国疾病预防控制中心，2016 YANG X X . Water Quality Monitoring and Health Survey in Typical Area Using Desalinated Seawater as Drinking Water[D]. Beijing: Chinese Center for Disease Control and Prevention, 2016.
3 赵明，沈娜，何文杰 . 淡化水作为城市供水时的水质问题与对策[J]. 水处理技术，2011，37(10):1-3, 20. ZHAO M , SHEN N , HE W J . Water quality issue and countermeasures in municipal water supply system using desalinated water[J]. Technology of Water Treatment, 2011, 37(10): 1-3.
4 童金忠，葛文越 . 海水淡化主要方法介绍和比较[J]. 中国建设信息（水工业市场），2007(3):45-49. TONG J Z , GE W Y . Introduction and comparison of main methods of seawater desalination[J]. China Construction Information（Water Industry Market）, 2007(3): 45-49.
5 BIRNHACK L , LAHAV O . A new post-treatment process for attaining Ca2+, Mg2+, SO4 2- and alkalinity criteria in desalinated water[J]. Water Research, 2007, 41(17): 3989-3997.DOI:10.1016/j.waters.2007.06.007
6 付昆明 . 《GB5749―2006生活饮用水卫生标准》总硬度限值的探讨[J]. 卫生研究，2017，46（1）：165-168. FU K M . The exploration of limitation of total hardness of《GB5749―2006 standards for drinking water quality》[J]. Journal of Hygiene Research, 2017, 46（1）：165-168.
7 中国人民解放军后勤部 . 低矿化度饮用水矿化卫生标准：GJ1335－92[S]. 北京：中国人民解放军后勤部，1992-06-13. Logistics Department of the Chinese People's Liberation Army . Hygienic Standard for Mineralization for Drinking Water with Low Mineral Level ：GJ1335－92[S]. Beijing: Logistics Department of the Chinese People's Liberation Army,1992-06-13.
8 刘宏伟 . 海水淡化水矿化工艺研究[D]. 天津：天津大学，2012. LIU H W . Remineralization of Desalinated Sea Water[D]. Tianjin: Tianjin University, 2012.
9 RYZNAR J W . A new index for determining amount of calcium carbonate scale formed by water[J]. Journal of American Water Works Association, 1944, 36(4):472-483. DOI:10.1002/j.1551-8833.1944.tb20016.x
10 许仕荣，赵伟，王长平，等 . 碳酸钙沉淀势理论计算模型及其应用[J]. 给水排水，2012，38(5):157-160. XU S R , ZHAO W , WANG C P , et al . Theoretical calculation model of calcium carbonate precipitation potential and its application[J].Water and Wastewater Engineering, 2012, 38(5): 157-160.
11 王冠，杨晓亮，宋武昌，等 . 给水管网水质化学稳定性判定指标及控制技术研究进展[J]. 城镇供水, 2015(3): 69-72.DOI:10.3969/j.issn.1002-8420.2015.03.027 WANG G ， YANG X L ， SONG W C ，et al . Research progress on determination index and control technology of water quality chemical stability of water supply network[J]. Journal of China Urban Water Association, 2015(3): 69-72. DOI:10.3969/j.issn.1002-8420.2015.03.027
12 LARSON T E , SKOLD R V . Corrosion and tuberculation of cast iron[J]. Journal(American Water Works Association), 1957, 49(10): 1294-1302. DOI:10.1002/j.1551-8833.1957.tb16946.x
13 IMRAN S A , DIETZ J D , MUTOTI G , et al . Red water release in drinking water distribution systems[J]. Journal of American Water Works Association, 2005, 97(9):93-100. DOI:10.1002/j.1551-8833.2005.tb07475.x
14 赵岚，郭俊生 . 085 碱性离子水及其研究进展[J]. 国外医学（卫生学分册）, 2004, 31(6):346-349. ZHAO L , GUO J S . 085 Alkaline ionized water and its research progress[J]. Foreign Medical Sciences (Section Hygiene), 2004, 31(6): 346-349.
15 温丹妮 . 氧化还原电位的研究进展及相关应用[J]. 轻工科技, 2017(7): 101-103. WEN D N . Research progress and related applications of redox potential[J]. Light Industry Science and Technology, 2017(7):101-103.
16 宋道军，余增亮，徐登益 . 生物体衰老的部分生化机理[J]. 大自然探索, 1997(2): 59-62. SONG D J , YU Z L , XU D Y . Partial biochemical mechanism of aging in organisms[J]. Exploration of Nature, 1997(2): 59-62.
17 尹军, 刘志生 . 饮用水ORP的健康意义及影响因素探讨[J]. 中国给水排水, 2005, 21(9):25-28.DOI:10.3321/j.issn:1000-4602.2005.09.007 YIN J , LIU Z S . Discussion on the significance of Oxidation reduction potential in drinking water for health[J].China Water & Wastewater, 2005, 21(9): 25-28. DOI:10.3321/j.issn:1000-4602.2005.09.007
18 尹军, 张小雨, 李娜,等 . 长白山地区天然矿泉水健康意义研究[J]. 给水排水, 2008, 34(11): 30-33.DOI:10.3969/j.issn.1002-8471.2008.11.008 YIN J , ZHANG X Y , LI N , et al . Research on the healthy of springs in Changbaishan area[J]. Water and Wastewater Engineering, 2008, 34(11): 30-33.DOI:10.3969/j.issn.1002-8471.2008.11.008
19 FOX M . 健康的水[M]. 北京:中国建筑工业出版社, 2001. FOX M . Healthy Water[M]. Beijing: China Architecture & Building Press, 2001. |
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