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您的检索式：作者名="Shiv O.PRASHER"
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| 1 | Effect of biochar on fate and transport of manure-borne estrogens in sandy soil显示文摘The feasibility of using two types of biochars to reduce steroid hormone pollution from poultry and swine manure application on agricultural land was evaluated.The sorption affinity and desorption resistance of softwood and hardwood biochars were also determined for two estrogen hormones,17β-estradiol(E2) and its primary metabolite estrone(E1).The softwood and hardwood biochars demonstrated high retention capacity for both estrogens.The effective distribution coefficient(K_d^(eff)) of soil-softwood-derived biochar(SBS_(450)) was significantly higher than soil-hardwood-derived biochar(SBH750),indicating the stronger sorption affinity of SBS450 for estrogens.To validate the laboratory results,a field lysimeter experiment was conducted to study the fate and transport of E2 and E1 in soil and leachate in the presence of 1% softwood-biochar(BS450) in topsoil and to compare it with soil without any amendments.The spatio-temporal distribution of both estrogens was monitored at four depths over a 46-day period.The lysimeters,in which the surface layer of soil was amended with biochar,retained significantly higher concentrations of both estrogen hormones.Although they leached through the soil and were detected in leachates,collected at 1.0 m depth,the concentrations were significantly lower in the leachate collected from biochar-amended lysimeters.The result confirmed the efficacy of biochar amendment as a remediation technique to alleviate the manure-borne hormonal pollution of groundwater. | Sanaz Alizadeh Shiv O.Prasher Eman ElSayed Zhiming Qi Ramanbhai M.Patel | 2018 | Journal of Environmental Sciences2018，30，11： | 2 |
| 2 | 河北坝上林田湖草土壤水盐氮分布与累积特征显示文摘[目的]探索干旱半干旱区土壤水盐氮的分布规律,为防治地下水面源污染和实现水土资源可持续利用提供依据。[方法]选取河北坝上地区4种典型的土地利用类型(林、田、湖、草),分析土壤水分、盐分以及硝态氮的变化特征,阐明不同土地利用类型土壤剖面的水盐氮分布规律。[结果]①不同土地利用方式中,安固里淖干涸湖底的土壤水盐含量最高,平均含水率达60.18%,且土壤水盐分布均表现出中等变异性,含水率变异程度更大。②林地、旱作农田和安固里淖干涸湖底0—220 cm土壤水盐分布规律基本一致,分别呈振荡型、均匀型和底聚型,而草地的水盐分布存在差异。③盐分离子在4种土地利用类型间均具有显著差异(p<0.05),其构成以SO_(4)^(2-)为主,K^(+),Mg^(2+)和Ca^(2+)普遍缺乏。④安固里淖干涸湖底土壤剖面平均硝态氮含量高达134.18 mg/kg,在林地和旱作农田分布呈表聚型,在安固里淖干涸湖底呈中间少、上下多的特征。草地硝态氮上层土壤累积明显。⑤林田湖草土壤硝态氮均与K^(+)存在显著或极显著正相关,K^(+)是控制区域硝态氮变化的主要因子。[结论]河北坝上林田湖草土壤水盐氮分布具有明显的差异性,安固里淖干涸湖底土壤水盐氮含量显著高于其他3种土地利用类型,对地下水造成严重的潜在污染。 | 李雅丽 Shiv O.Prasher 裴宏伟 赵莉莉 张红娟 刘孟竹 何延青 | 2023 | 水土保持通报2023，43，1： | 0 |
| 3 | Effect of biochar amendment on soil's retention capacity for estrogenic hormones from poultry manure treatment显示文摘Most animals, including humans, produce natural sex hormones such as estrogens: 17β-estradiol(E2) and estrone(E1). These compounds are able to disrupt the reproductive systems of living organisms at trace concentrations(ng·L^(–1)). This experiment tests the hypothesis that 1% slow pyrolysis biochar-amended sandy soil could retain significant amount of estrogens(E1, E2)from poultry manure in its second year of application. The experiment was conducted over 46 days and consisted of a series of lysimeters containing sandy soil with biocharamended topsoil. The application rate of poultry manure was kept at 2.47 kg·m^(–2). The biochar held a significant concentration of hormone during the first year of its application. However, in the following year(current study), there was no significant retention of hormones in the biochar-amended soil. During the first year after application, the biochar was fresh, so its pores were available for hydrophobic interactions and held significant concentration of hormones. As time passed there were several biotic and abiotic changes on the surface of the biochar so that after some physical fragmentation, pores on the surface were no longer available for hydrophobic interactions. The biochar started releasing dissolved organic carbon, which facilitated greater mobility of hormones from poultry manure down the soil profile. | Sukhjot MANN Zhiming QI Shiv O.PRASHER Lanhai LI Dongwei GUI Qianjing JIANG | 2017 | Frontiers of Agricultural Science and Engineering2017，4，2： | 0 |
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