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The concentrations of CODcr and NH4+ vary from low to high, then from high to low in the process of refuse leaching, that is to say that there are three phases which are aerobian decomposition, facultative aerobian and anaerobian decomposition;(3)The time of landfill reaching to stabilize under the condition of filtration, for landfill of Jinqianpu, is at least 86 years if CODcr is regarded as a index; but is about 98 years when NH4+ as an index;(4)The column leaching experiment simulated is carried on interactivity between leachate and different lithologic characters, water-bearing media of different thickness. Some parameters can be determined by calculation, such as, the retained factor and hydro-chemical transportation rate of pollutants in suspended media, which quantitatively analyse the suspended soil capability of components purification and the pollution scope of water bearing media.
垃圾淋滤过程中和经历了一个由低到高、再由高到低的过程,即垃圾填埋过程中经历了好氧分解、兼性好氧分解及完全厌氧分解等三个阶段;(3)垃圾组分在淋滤条件下分解达到稳定的时间,对于金钱堡垃圾填埋场,若以作为考核指标,填埋场达到稳定化时间至少需要86年;若以作为考核指标,则填埋场达到稳定化至少需98年的时间;(4)对垃圾浸泡液与不同岩性、不同厚度含水层介质之间的作用进行了土柱淋滤模拟试验,通过计算污染质在包气带介质中运移的阻滞因子和水化学迁移率等参数,定量地描述了包气带土层对污染质的净化能力和污染范围。
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Zak mixed 840 ml of vermiculite with 60 ml of finely ground peat moss in the flask, moistened this substrate with 550 ml of MMN nutrient solution, capped the flask with an inverted glass having a cheesecloth-wrapped cotton plug cemented to the bottom, and autoclaved the assembly for 45-60 min at 120℃.
萨克氏混合840 ml的蛭石与60 ml磨细的泥碳土於烧瓶中作为基质,以550 ml的MMN营养液润湿之,再以纱布包棉花塞黏於玻璃杯倒盖之,并将整组器具於120℃高温高压灭菌45-60分钟。
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Synthesis apparatus Zak mixed 840 ml of vermiculite with 60 ml of finely ground peat moss in the flask, moistened this substrate with 550 ml of MMN nutrient solution, capped the flask with an inverted glass having a cheesecloth-wrapped cotton plug cemented to the bottom, and autoclaved the assembly for 45-60 min at 120℃.
萨克氏混合840 ml的蛭石与60 ml磨细的泥碳土於烧瓶中作为基质,以550 ml的MMN营养液润湿之,再以纱布包棉花塞黏於玻璃杯倒盖之,并将整组器具於120℃高温高压灭菌45-60分钟。
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A large amount of nitrogenous fertilizer that is not absorbed by crops or evaporated into the air is easily leached transport and accumulated in the shallow vadose zone. The accumulated nitrogen is released again and leached down into subsoils and groundwater, causing pollution. The process is mainly affected by climate, soil structure and microorganism transformation, etc.
田间施肥后,未挥发和被作物吸收的剩余N素易淋失运移,引起在浅层包气带土壤中的蓄积,且又易再释放进入下层土或地下水中形成污染,并主要受气候、土质结构、微生物作用等的影响。
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balled:再包土的
balldistancering 滚珠轴承座圈 | balled 再包土的 | ballediron 铁坯