论文

微波-超声协同强化NaCl改性沸石对罗氏沼虾模拟保活中水质氨氮去除的研究

  • 杨丰1 ,
  • 李念1 ,
  • 陈露珠1 ,
  • 安鑫1 ,
  • 施文正1 ,
  • 2 ,
  • 汪之和1 ,
  • 2 ,
  • 3
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  • (1 上海海洋大学食品学院,上海 201306;
    2 国家淡水水产品加工技术研发分中心(上海),上海 201306;
    3 上海水产品加工及贮藏工程技术研究中心,上海 201306)
杨丰(1994—),男,硕士研究生,研究方向:水产品加工与贮藏。E-mail:Frankyyang01@126.com

网络出版日期: 2020-12-07

基金资助

国家重点研发计划项目 “水产加工品贮运流通过程中营养品质的变化规律与调控机制(2018YFD0901006)”

Study on the removal of ammonia nitrogen in water during the simulated keep-alive process of Macrobrachium rosenbergii by modified zeolites through microwave – ultrasonic strengthening of NaCl#br#

  • YANG Feng 1 ,
  • LI Nian1 ,
  • CHEN Luzhu 1 ,
  • AN Xin 1 ,
  • SHI Wenzheng 1 ,
  • 2 ,
  • WANG Zhihe 1 ,
  • 2 ,
  • 3
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  • (1 Food College, Shanghai Ocean University, Shanghai 201306, China;
    2 National Research and Development Center for Processing Technology of Freshwater Aquatic Products (Shanghai), Shanghai 201306, China;
    3 Shanghai Aquatic Product Processing and Storage Engineering Technology Research Center, Shanghai 201306, China)

Online published: 2020-12-07

摘要

为提高罗氏沼虾(Macrobyachium rosenberqii)保活的存活时间和存活率,通过正交试验确定微波与超声波协同强化NaCl溶液改性沸石工艺的最佳条件,测试水质氨氮质量浓度与pH、沸石投放量与吸附时间对其吸附性能的影响,研究罗氏沼虾保活过程中存活率与水质指标的变化并对改性沸石进行表征分析。结果显示:以粒径为1~2 mm的沸石进行先微波(230 W、10 min)后超声(560 W、28 kHz、50 min)强化氯化钠溶液(摩尔浓度0.8 mol/L)改性,在氨氮质量浓度为20 mg/L、pH为7.0的水体中投放30 g/L的改性沸石,吸附1 h的水质氨氮去除率相比未改性沸石提高20.88%;表征发现,沸石改性后比表面积增大,晶格未造成破坏,Na+交换率显著提高,沸石硅铝比升高,能较好维持其电荷平衡;应用于罗氏沼虾模拟保活,使其存活率显著提高,其水质指标均得到有效控制。微波-超声波协同强化氯化钠溶液改性沸石可有效去除氨氮,可延长罗氏沼虾保活时间、提高存活率。

本文引用格式

杨丰1 , 李念1 , 陈露珠1 , 安鑫1 , 施文正1 , 2 , 汪之和1 , 2 , 3 . 微波-超声协同强化NaCl改性沸石对罗氏沼虾模拟保活中水质氨氮去除的研究[J]. 渔业现代化, 2020 , 47(4) : 28 -37 . DOI: 10.3969/j.issn.1007-9580.2020.04.005

Abstract

In order to improve the survival time and survival rate of Macrobrachium rosenbergii, the optimum condition of zeolite modification process was determined by orthogonal experiment through microwave and ultrasonic strengthening of Nacl solution, and the effects of ammonia nitrogen concentration and pH, zeolite dosage and adsorption time on the adsorption performance were tested. The changes of survival rate and water quality index during the keep-alive process were studied, and the characterization of modified zeolite was analyzed. The results showed that zeolites with particle size of 1~2mm were modified through microwave (230W, 10min) and ultrasonic (560W, 28kHz, 50min) strengthening of NaCl solution (morality of 0.8 mol/L). The removal rate of ammonia nitrogen by adding 30g/L modified zeolite for one hour of adsorption into water with ammonia nitrogen concentration of 20mg/L and pH of 7.00 was 20.88% higher than that of unmodified zeolite. The characterization showed that the specific surface area of the modified zeolites increased without damaging the crystal lattice, the exchange rate of Na+ significantly increased and the ratio of Si to Al increased, which could well maintain the charge balance. The survival rate of Macrobrachium rosenbergii was significantly improved and its water quality index was effectively controlled. Therefore, the modified zeolite through microwave - ultrasonic strengthening of Nacl solution can effectively remove ammonia nitrogen to prolong the survival time and improve the survival rate of Macrobrachium rosenbergii.
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