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31.
Yan Mi He Lei Prabowo Bayu Fang Zhumin Lin Jie Xu Zhang Hu Yanjun 《Journal of Material Cycles and Waste Management》2018,20(3):1594-1604
Journal of Material Cycles and Waste Management - Efforts to improve the performance of hydrothermal treatment (HT) in producing high-quality solid fuel from sewage sludge were carried out by... 相似文献
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市场与政府对农户绿色防控技术采纳的协同作用分析 总被引:2,自引:0,他引:2
农户绿色防控技术的采纳对于农药减量、农产品质量提升和生态环境保护具有重要的积极作用。基于湖北宜昌、丹江口和江西赣州285个柑橘种植户样本,运用二元Logistic回归方法,分析市场利润与政府的激励和约束政策对农户绿色防控技术采纳意愿和行为的影响。研究表明:(1)仍有36.14%的样本农户在具有绿色防控技术采纳意愿的前提下并没有真实的绿色防控技术采纳行为;(2)农户的绿色防控技术采纳行为表达受市场利润与政府激励和约束政策的双重影响。在绿色市场发展不完善,市场利润激励不足的情况下,政府激励与约束政策均能不同程度促进农户的绿色防控技术采纳行为。也即政府激励与约束政策弥补绿色农产品市场不足,在引导和规范农户的绿色病虫害防治上起到积极作用。 相似文献
35.
Fu Li Chen Yi Yang Xinyi Yang Zuyao Liu Sha Pei Lei Feng Baixiang Cao Ganxiang Liu Xin Lin Hualiang Li Xing Ye Yufeng Zhang Bo Sun Jiufeng Xu Xiaojun Liu Tao Ma Wenjun 《Environmental science and pollution research international》2019,26(20):20137-20147
Environmental Science and Pollution Research - Fetal growth has been demonstrated to be an important predictor of perinatal and postnatal health. Although the effects of maternal exposure to air... 相似文献
36.
Ling R. Zeng Li H. Shi Xin G. Meng J. Xu Gui F. Jia T. Gui 《Journal of environmental science and health. Part. B》2019,54(4):317-325
This study evaluated the hydrolysis and photolysis kinetics of pyraclostrobin in an aqueous solution using ultra-high-performance liquid chromatography–photodiode array detection and identified the resulting metabolites of pyraclostrobin by hydrolysis and photolysis in paddy water using high-resolution mass spectrometry coupled with liquid chromatography. The effect of solution pH, metal ions and surfactants on the hydrolysis of pyraclostrobin was explored. The hydrolysis half-lives of pyraclostrobin were 23.1–115.5?days and were stable in buffer solution at pH 5.0. The degradation rate of pyraclostrobin in an aqueous solution under sunlight was slower than that under UV photolysis reaction. The half-lives of pyraclostrobin in a buffer solution at pH 5.0, 7.0, 9.0 and in paddy water were less than 12?h under the two light irradiation types. The metabolites of the two processes were identified and compared to further understand the mechanisms underlying hydrolysis and photolysis of pyraclostrobin in natural water. The extracted ions obtained from paddy water were automatically annotated by Compound Discoverer software with manual confirmation of their fragments. Two metabolites were detected and identified in the pyraclostrobin hydrolysis, whereas three metabolites were detected and identified in the photolysis in paddy water. 相似文献
37.
Ting Gui Gui F. Jia Jin Xu Shi J. Ge Xiao F. Long 《Journal of environmental science and health. Part. B》2019,54(4):326-335
A modified quick, easy, cheap, effective, rugged and safe (QuEChERS) method was developed for the determination of thiamethoxam and its metabolite clothianidin in citrus (including the whole citrus, peel and pulp) and soil samples by liquid chromatography-tandem mass spectrometry. The sample was extracted with acetonitrile and purified with octadecylsilane. The detection limits of both compounds were 0.0001–0.0002?mg kg–1, while the limit of quantification of thiamethoxam was 0.002?mg kg–1 and the limit of quantitation of metabolites was 0.001?mg kg–1. The recovery was 70.37%–109.76%, with inter-day relative standard deviations (RSD) (n?=?15) values ≤9.46% for the two compounds in the four matrices. The degradation curve of thiamethoxam in whole citrus and soil was plotted using the first-order kinetic model. The half-life of the whole citrus was 1.9–6.2?days, and the half-life of the soil was 3.9–4.2?days. The terminal residue of thiamethoxam (the sum of thiamethoxam and clothianidin, expressed as thiamethoxam) was found to be concentrated on the peel. The final residual amount of thiamethoxam in the edible portion (pulp) was less than 0.061?mg kg–1. The risk quotient values were all below 1, indicating that thiamethoxam as a citrus insecticide does not pose a health risk to humans at the recommended dosage. 相似文献
38.
采用UV-254 nm活化过硫酸盐高级氧化技术去除水中污染物麻黄碱(EPH),并研究了其降解动力学过程和降解机理.考察了过硫酸盐(PS)投加量、EPH的初始浓度、不同pH值及不同离子(HCO~-_3、NO~-_3、Cl~-)对降解效果的影响.结果表明,UV-254 nm活化过硫酸盐工艺能有效去除实验条件下的EPH,其氧化降解反应符合二级动力学方程.EPH去除率随着PS投加量的增加而增大.pH对降解反应有较大的影响,在pH=7的条件下,反应速率最快,表观反应动力学常数(k_(obs))为0.467 min~(-1).进一步研究表明,HCO~-_3、NO~-_3和Cl~-对EPH的降解都存在抑制作用,在相同浓度下,其抑制程度依次为Cl~- NO~-_3 HCO~-_3.通过UPLC-MS/MS鉴定了麻黄碱降解的中间体,并提出了可能的降解机理和转化途径. 相似文献
39.
畜禽环境中抗生素的去除及其风险评估 总被引:2,自引:0,他引:2
抗生素作为饲料添加剂广泛应用于畜禽养殖业,造成养殖环境抗生素大量蓄积,尤其是在畜禽粪便中,长期的积累不仅污染养殖场内土壤环境,残留的抗生素还会随畜禽粪便进入周边水体及农田环境,威胁农作物及人体健康。目前,国内相关研究主要集中在抗生素的降解工艺及降解规律方面,而对其去除效率的影响因素及风险评价研究相对较少。笔者综述了国内外抗生素的降解转化及去除方式等的研究进展,并概述了抗生素在畜禽环境中的生态风险评估的研究现状,为抗生素的高效去除、风险预估及畜禽粪便资源化安全利用提供理论基础和技术支撑。 相似文献
40.
Kun Zhang Jialuo Xu Qing Huang Lei Zhou Qingyan Fu Yusen Duan Guangli Xiu 《Frontiers of Environmental Science & Engineering》2020,14(6):92