1)N and P pollution氮磷污染
1.② Spatial variations of N and P pollution were observed, as the creeks in different places accepted different types and amounts of pollutants.②由于受纳污染物类型和总量上的差异 ,中小河流氮磷污染存在明显的空间分异 :居民区附近的小河流氨氮和磷的污染很重 ;主要受农田径流影响的小河流 ,氨氮和磷的污染较轻 ,但受硝氮污染的风险加大 ;养殖场附近的小河流 ,氨氮和磷有突发性暴增的现象 。
英文短句/例句
1.Impact Study of Agricultural Non-Point Source of Nitrogen and Phosphorus to Water Environment;农业非点源氮磷污染对水环境的影响
2.Study on the Characteristics of Nitrogen and Phosphorus Pollution in the Return Flow of Rice Paddy in Nigxia Irrigation Region宁夏黄灌区稻田退水氮磷污染特征研究
3.Nitrogen and Phosphorus Control of Farmland Drainage for Constructed Wetland in Karst Region人工湿地对岩溶区农田排水氮磷污染的控制
4.Pollution Load of N and P from Typical Suburb Regions in Dianchi Lake Catchments滇池流域典型城郊氮磷污染负荷定量研究
5.Research on Nitrogen and Phosphorus Pollution of the Great Canal in Hangzhou City and Hydrodynamics of Phosphorus Release from the Sediments;杭州市运河水系氮磷污染及底泥磷释放水动力学研究
6.Research on In-situ Control Technology of Nitrogen and Phosphorus Release from Sediments and Its Mechanisms;地表水体底泥氮磷污染原位控制技术及相关机理研究
7.Distribution Characteristics of Nitrogen and Phosphorus Pollution in the Surface Water Source of Shijiazhuang City石家庄市地表水源氮、磷污染分布特征
8.Study on the Characteristic of Nitrogen and Phosphorus Pollution of Urban Lakes in Guangdong Province;广东省城市湖泊氮、磷污染特征研究
9.Nitrogen and Phosphor Pollution Control Investigation of Surface Water Source in Shijiazhuang;石家庄市地表水源氮、磷污染控制研究
10.Study on the Rule of Sagittaria Sagittifolia Linn. Wipping Off the Pollutant of Phosphorus and Nitrogen;慈姑对磷、氮污染物的去除规律研究
11.Studies on the Absorption and Concentration Effect of Duckweed to Nitrogen and Phosphorus in Polluted Waterbodies;浮萍对污染水体中氮磷吸收富集作用研究
12.The Primary Studies on Nitrogen and Phosphorus Cycling and Pollutant Refining in the Coastal Wetlands of of Yangtze Estuary;长江口滨海湿地氮、磷循环及污染净化初步研究
13.Study on Nitrogen and Phosphorus Removal with Attached Algae in Light Polluted Water;着生藻类去除微污染水体中氮磷的试验研究
14.Study on the Control to Nitrogen and Phosphorus Non-point Source Pollution from Vegetable Fields by Fertilization in the Suburb of Fuzhou City福州市郊菜地氮磷面源污染的施肥控制研究
15.Studies on Influence Factors of Nitrogen and Phosphorus Loss of Agricultural Non-point Source Pollution in Hunan Province湖南农业面源污染中氮、磷损失的影响因素研究
16.Estimation on Loads from Nitrogen and Phosphorus Loss in Agriculture in Ningxia Irrigation District宁夏灌区农业氮磷流失污染负荷估算研究
17.Membrane Fouling Characteristics of Nitrogen and Phosphorus Removal Membrane Bioreactor生物脱氮除磷膜生物反应器膜污染研究
18.Study on Nitrogen and Phosphorus Removal from Tiny Polluted Water Source by Modfied Zeolite改性沸石净化微污染水源水中氮磷的研究
相关短句/例句
adsorbed nitrogen and phosphorus pollution吸附态氮磷污染
1.Employing the non-point source adsorbed nutrition load model,the loads of adsorbed nitrogen and phosphorus pollution were calculated and analyzed.以美国通用土壤流失方程为基础,根据研究流域的特征和已有的研究成果确定方程中的因子算式,在地理信息系统GIS支持下,估算了各单元的土壤流失量,应用吸附态非点源污染负荷模型,对嘉陵江流域吸附态氮磷污染负荷进行了数值模拟与定量分析。
3)Nitrogen and phosphorus contaminants removal氮、磷污染物去除
4)N and P non-point source pollution氮磷面源污染
1.N and P non-point source pollution status quo of vegetable fields at the suburb of Fuzhou city was evaluated by testing samples of vegetable (120 samples), surface-field water (16 samples) and groundwater (11 samples) collected from 14 pieces of vegetable fields which located at the suburb of that city according to the related criterions in this paper.通过对福州市郊14片蔬菜基地的120个蔬菜样品、16个田面水样和11个地下水样的检测,并引用相关评价标准,分析了福州市郊菜地氮磷面源污染现状。
5)nitrogen and phosphorus load氮磷污染负荷
1.Based on GIS,nitrogen and phosphorus load were calculated and displayed as spatial maps.在GIS技术支持下,估算了厦门岛内氮磷污染负荷的分布特征。
6)nitrogen-phosphorus wastewater氮磷污水
1.Comparative research on protein production capacity and freeze resistance capability of duckweed in nitrogen-phosphorus wastewater purification;浮萍净化氮磷污水的蛋白质生产能力及耐寒能力比较研究
延伸阅读
有机磷农药污染 有机磷农药是现有农药中品种最多的一类,约有100多种，多数是杀虫剂（如敌百虫、敌敌畏），少数是杀菌剂（如稻瘟净、异稻瘟净、克瘟散）、除莠剂（如地散磷、草特磷）和杀线虫剂（如除线特、线虫磷、治线磷、除线磷）。其中有些农药亲体及其在自然环境中的降解产物，残留在环境中或作物上可造成农药污染。 有机磷农药分类 有机磷农药按其分子中所含的元素或基团的不同可分为五类，如表所示。 有机磷农药特性 有些有机磷农药易溶于水，如敌百虫、磷胺、甲胺磷、乙酰甲胺磷等。因此，这些农药易于淋洗流失。有机磷农药分子结构一般具有容易断裂的化学键。例如，一些有机磷农药的酸性基团（如羧基、酰胺基、醚基等）易水解；酸性基团中有吸电子取代基（如卤素）存在时可增强磷原子的正电性，并能加速碱性水解速度；磷原子双键上的氧可增强磷原子的正电性，使P-O键易被破坏；硫代磷酸酯类经光化学作用或生物代谢而成氧化衍生物后,也因增强了磷原子的正电性,使P-O键易断裂降解。此外，有机磷农药可被生物体内的水解酶系水解。 有机磷农药一般在自然环境中会迅速降解。在土壤中的降解会随土壤含水量、温度和pH值的增高而加快。在水体中的降解会随水的温度、pH值的增高，以及微生物数量、光照等的增加而加快。因此有机磷农药大多数品种不像有机氯农药那样稳定，它们在土中的残留时间仅数天或数周。 少数有机磷农药的特性则不同。如一硫代磷酸酯类和二硫代磷酸酯类中的内吸磷类型农药，亲体分子毒性大，进入生物体后能继续氧化为毒性也大的亚砜和砜化合物。这类农药毒性的残存期较长，在生长期短的作物（如蔬菜）上不宜使用。 有机磷农药毒性 有机磷农药是急性中毒类农药。如对硫磷和内吸磷等都是剧毒品，并且，一般有机磷农药及其降解产物都有特殊臭味（见农药污染对健康的影响）。
