中国农业科学 ›› 2019, Vol. 52 ›› Issue (8): 1458-1474.doi: 10.3864/j.issn.0578-1752.2019.08.015
• 畜牧·兽医·资源昆虫 • 上一篇
汪开英,吴捷刚,赵晓洋
收稿日期:
2018-08-02
接受日期:
2019-02-22
出版日期:
2019-04-16
发布日期:
2019-04-26
作者简介:
汪开英,E-mail:基金资助:
WANG KaiYing,WU JieGang,ZHAO Xiaoyang
Received:
2018-08-02
Accepted:
2019-02-22
Online:
2019-04-16
Published:
2019-04-26
摘要:
随着畜禽养殖集约化程度的提高,高密度、集约化的畜禽养殖引起的畜禽养殖场空气污染问题日益突出,畜牧业已成为我国空气污染的重要来源之一。畜禽场排放的氨气(NH3)、硫化物(H2S)、颗粒物(particulate matters,PM)和挥发性有机物(volatile organic compounds,VOCs)等空气污染物不仅对畜禽场人畜健康造威胁,还会扩散到周围环境中形成大气污染。科学适用的空气污染物检测方法和技术是研究和控制畜禽场空气污染的前提。文章对国内外畜禽场的NH3、H2S、温室气体、PM以及恶臭等主要空气污染物的检测方法与技术进行了介绍与分析。以NH3、H2S为代表的畜禽场有害气体检测方法主要有化学分析法、半导体气体传感器检测法、光谱法、质谱法与气相色谱法,其中,湿化学法灵敏度高,成本低,可以准确获取气体浓度,但检测费时费力,且无法实时在线检测;气体检测管法成本较低,操作简单,但误差相对较大;电化学传感器法灵敏度较高,成本适中,可以连续检测气体浓度,但存在装置易老化、使用寿命较短等缺陷;光谱法、质谱法以及气相色谱法可快速准确检测气体,但检测仪器昂贵,使用成本较高,不适合生产性畜禽场的常规检测。文章主要介绍与分析了反刍动物肠道发酵、畜禽舍、粪污贮存与处理过程中温室气体CH4、CO2、N2O的检测方法和技术。畜牧业温室气体排放随时间、季节和采样点等不同而不断变化,实现畜牧业温室气体的精确监测较为困难,目前仍未有国际通用的检测方法与测量标准,畜牧业温室气体检测方法与技术及其标准研究亟待开展。文章从物理特征、化学特征及生物特征三个方面对畜禽场排放的颗粒物检测方法与技术进行了综述。畜禽场PM成分复杂,其吸附的NH3、恶臭化合物、微生物的影响有待评估,因此亟待完善PM的物理、化学和生物成分的检测方法与技术,以获取畜禽场PM的全面特征信息。文章对畜禽场的主要恶臭物质成分和恶臭感官的检测方法与技术进行了综述。相比气相色谱-质谱联用法,采用专业嗅辨人员对恶臭浓度进行嗅辨分析的方法成本更高,且主观性较强。但气相色谱-质谱联用技术无法仅凭借气体样品确定所有气态有机化合物,同时难以确定引起恶臭的化合物种类。因此结合气相色谱与动态嗅觉仪可更全面的分析恶臭样品指标。文章还对国内外畜禽场空气污染物(包含有害气体、温室气体、颗粒物以及恶臭物质)的主要检测方法与技术进行综述,以期为我国畜禽养殖业的空气污染物检测技术的研发与应用提供参考。
汪开英,吴捷刚,赵晓洋. 畜禽场空气污染物检测技术综述[J]. 中国农业科学, 2019, 52(8): 1458-1474.
WANG KaiYing,WU JieGang,ZHAO Xiaoyang. Review of Measurement Technologies for Air Pollutants at Livestock and Poultry Farms[J]. Scientia Agricultura Sinica, 2019, 52(8): 1458-1474.
表2
NH3检测方法对比[7]"
灵敏度 Sensitivity | 检测方法 Testing method | 数据表达 Readout | 采样方式 Active or passive | 反应时间 Response time | 仪器成本 Cost | |
---|---|---|---|---|---|---|
湿化学法 Wet-chemical method | 0.1-1mg·L-1 | 点 Point | 间接 Indirect | 主动 Active | h | 低 Low |
pH试纸法 pH test paper method | mL·L-1 | 点 Point | 直接 Direct | 被动 Passive | s | 非常低 Very low |
主动采样管 Active dosimeter tubes | 0.5 mL·L-1 | 点 Point | 直接 Direct | 主动 Active | s | 低 Low |
被动采样管 Passive dosimeter tubes | mL·L-1 | 点 Point | 直接 Direct | 被动 Passive | h | 低 Low |
电化学传感器法 Electrochemical sensor method | μL·L-1 | 点 Point | 直接 Direct | 主动/被动 Active/Passive | h | 高 High |
半导体传感器法 Semiconductor sensor method | mL·L-1 | 点 Point | 直接 Direct | 主动 Active | s | 低 Low |
FTIR光谱法 FTIR spectral method | μL·L-1 | 开路 Point | 直接 Direct | 被动 Passive | min | 非常高 Very high |
UV-DOAS探测仪 UV-DOAS detector | μL·L-1 | 开路 Open path | 直接 Direct | 被动 Passive | s | 高 High |
光声红外探测器法 Photoacoustic infrared detector method | mL·L-1 | 点 Point | 直接 Direct | 主动 Active | s | 高-非常高 High-very high |
质谱法 Mass spectrometry method | μL·L-1 | 开路 Open path | 直接 Direct | 主动 Active | s | 高 High |
表3
H2S检测方法对比"
灵敏度 Sensitivity | 检测方法 Testing method | 数据表达 Readout | 采样方式 Active or passive | 反应时间 Response time | 仪器成本 Cost | |
---|---|---|---|---|---|---|
湿化学法 Wet-chemical method | 0.1-1 mg·L-1 | 点 Point | 间接 Indirect | 主动 Active | h | 低 Low |
主动采样管 Active dosimeter tubes | mL·L-1 | 点 Point | 直接 Direct | 被动 Passive | h | 低 Low |
被动采样管 Passive dosimeter tubes | mL·L-1 | 点 Point | 直接 Direct | 主动 Active | s | 低 Low |
半导体传感器法 Semiconductor sensor method | mL·L-1 | 点 Point | 直接 Direct | 主动 Active | s | 低 Low |
FTIR光谱法 FTIR spectral method | μL·L-1 | 开路 Open path | 直接 Direct | 被动 Passive | min | 高 High |
气相色谱法 Gas chromatography method | mL·L-1 | 开路 Open path | 直接 Direct | 主动 Active | s | 高 High |
表4
家畜肠道发酵温室气体检测方法的优缺点"
检测方法 Testing method | 优点 Advantages | 缺点 Disadvantages |
---|---|---|
呼吸代谢箱法 Respiratory metabolism box method | 发展较为成熟,应用广泛;可精确的测量肠道发酵产生的甲烷 Mature development and wide application; Accurate measurement of methane produced by intestinal fermentation | 不能真实反映家畜体外的自然环境;构造和维修费用昂贵 Unable to reflect the external natural environment of livestock; High cost |
六氟化硫示踪法 sulfur hexafluoride tracer method | 投资和运行费用低;可进行群体检测 Low investment and operating costs; Group detection | 发展不够成熟,仪器设备有待改进 Instruments and equipment need to be improved |
头罩法和面罩法 Headcover and mask method | 成本低 Low cost | 低估甲烷产量;准确度不高;使用具有局限性 Understating methane production; Low accuracy; Limitations of usage |
表5
畜禽场PM的化学成分分析方法"
分析内容 Analysis content | 采样器 Sampler | 分析方法 Analytic method |
---|---|---|
离子 Ions | 带尼龙滤膜的颗粒物采样器 Particle sampler with nylon filter membrane | 离子色谱法 Chromatography of ions |
元素 Elements | 带特氟龙滤膜的颗粒物采样器 Particle sampler with Teflon filter membrane | 能量色散X射线光谱分析法 Energy dispersive x-ray spectroscopy |
有机碳、元素碳 OC、EC | 带石英滤膜的颗粒物采样器 Particle sampler with quartz filter membrane | 热光学分析法 Thermal optical analysis |
表6
畜禽场恶臭成分分析方法"
成分分析方法 Component analysis method | 原理 Theory | 检测物质 Substance detected | 优点 Advantages | 缺点 Disadvantages | 参考文献 References |
---|---|---|---|---|---|
湿化学法 Wet-chemical method | 利用被测气体成分与示剂的化学反应来测定气体浓度 Determination of gas concentration by chemical reaction between measured gases and indicators | NH3、H2S、SO2、硫醇类物质等 NH3, H2S, SO2, thiols, etc. | 方法成熟,检测精度较高 mature method and high precision | 检测时间较长 Longer detection time | [107] |
气体探测管 Gas tubes | 利用被测气体成分附着在固体指示剂表面的显色反应来测定气体浓度 Determination of gas concentration by color reaction of the gas components attached to the surface of the solid indicators | NH3、H2S、二甲基硫醚等 NH3, H2S, dimethyl sulfide, etc. | 使用方便 Convenience of usage | 检测精度较低 Low detection accuracy | [108, 109] |
气相色谱分析法 Gas chromatography | 利用不同组分在流动相(载气)和固定相间的分配差异进行分离 Separation of different components between mobile phase (carrier gas) and stationary phase | H2S、CS2、甲苯、二甲苯、吲哚类物质等 H2S, CS2, toluene, xylene, indole, etc. | 分析速度快,灵敏度高 Fast analysis and high sensitivity | 无法反映恶臭的气味特征,采样容器易造成样品污染和损失 Unable to reflect the smell characteristics of odors; samples easy to get polluted | [110-112] |
质谱分析法 Mass spectrometry | 将样品离子化,变为气态离子混合物,并按质荷比(m/z)分离,从而测定物质的质量与含量及其结构 Ionized into a gaseous ion mixture and separated according to the mass charge ratio (m/z), so as to determine the mass, content and structure of the substance. | 甲苯、二甲苯、等 Toluene, xylene, etc. | 分析对象范围广泛、检测灵敏度高 Wide range and high sensitivity | 仪器使用、维护成本高 High cost | [113-116] |
色谱-质谱联用法 Chromatography-mass spectrometry | 结合气相色谱法对混合物的高效分离能力与质谱法对纯化合物的准确定性能力对恶臭进行分析 Analysis of odor by high efficientseparation of mixtures by gas chromatography and accurate qualitative analysis of pure compounds by mass spectrometry | SO2、甲苯、二甲苯、等多种恶臭物质 SO2, toluene, xylene, etc. | 结合色谱法与质谱法优点 Combined advantages of chromatography and mass spectrometry | 仪器使用、维护成本高 High cost | [117-120] |
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