環(huán)保主題的PPT模版 2.ppt

1、,拯救我們的家園環(huán)境工程,環(huán)境工程,水體污染控制,水體污染的控制措施，除加強污染源的管理，以降低廢水量和污染量外，政府應(yīng)制定和頒布法規(guī)以控制廢水的排放，如中國政府制定和頒布了中華人民共和國水污染防治法、工業(yè)“三廢”排放試行標(biāo)準(zhǔn)等法規(guī)。城鎮(zhèn)應(yīng)建設(shè)完善的排水管系和廢水處理廠，并制定和實施管理制度。工業(yè)布局和工藝要考慮環(huán)境要求。生產(chǎn)廢水必須處理后出廠（見工業(yè)廢水治理），廢水再用，特別是建立廢水灌溉系統(tǒng)，是防止廢水污染水體的有效途徑。,水體污染控制,水體污染物主要有：病原體，如病菌、病毒和寄生蟲卵等；來源于動植物的有機物，如動植物排泄物、動植物殘體、機體的組分等，它們在水體中的細菌作用下消耗溶解氧；植

2、物養(yǎng)料，主要有氮、磷化合物，將使潺湲的水體出現(xiàn)富營養(yǎng)化；有毒有害的化學(xué)品，如含氯農(nóng)藥（DDT、六六六等）、表面活性劑、重金屬鹽類、放射性物質(zhì)等；其他，如油脂、酸、堿、溫水，懸浮物等（見廢水水質(zhì)）。,固體廢物處置,固體廢物的處置方法,掩埋,焚化,加工利用,掩埋,焚化,加工利用,固體廢物處置,噪聲污染控制,干擾人們休息、學(xué)習(xí)、生活和工作，甚至影響健康的聲音，統(tǒng)稱為噪聲。噪聲由許多純音組成。純音(單頻率的聲音)的聲壓(p)可用與基準(zhǔn)聲壓(p0接近一般人的聽閾，通常采用p0210-5帕)相比的聲壓級（Lp）表示，單位為分貝（dB），它的數(shù)學(xué)表達式為Lp201g(p/p0)。噪聲強弱的測定較復(fù)雜，不但要

3、結(jié)合各純音的頻率，還要結(jié)合人的主觀感受。有多種方法量度，一般采用聲級，單位也用分貝。聲級可用聲級計直接測得。聲級增加40分貝，聲壓約增百倍，干擾大大增加。一般認為低于85分貝時不致影響聽力。噴氣飛機起飛時的噪聲達150分貝，使耳鼓發(fā)痛。160分貝的噪聲使人致聾。噪聲還影響人的中樞神經(jīng)系統(tǒng)和心血管系統(tǒng)，會導(dǎo)致神經(jīng)衰弱和心血管病。噪聲還影響講話和電話的使用?？墒谷酥旅@的噪聲還影響某些儀表的使用。,噪聲污染控制,噪聲主要來自機器（工業(yè)噪聲）和交通工具（交通運輸噪聲）?？刂圃肼暿紫仁遣挥眯鷩痰脑O(shè)備：或則改革工藝，如改鉚接為焊接；或則改換機械，如用壓樁機替代打樁機。其次是革新機械的構(gòu)造和材料，如提高部件

4、精度減少碰撞，用非金屬材料替代金屬材料，傳動部件用彈性構(gòu)件，整機采用隔振機座或隔聲罩，排氣口設(shè)消聲器，交通工具外形采用流線型等。再次是正確操作，如正確使用潤滑劑，正確使用喇叭等音響設(shè)備。建立隔聲屏障（如墻、土丘）或建筑表面多用吸聲、隔聲材料，以及城市合理規(guī)劃等等，也是有效的措施（見飛機場環(huán)境保護）。,還行,空氣質(zhì)量,大氣污染控制,一般,空質(zhì)量,重組上市,2003,2004,2010,近年空氣質(zhì)量,Click to edit title style,Description of the contents,Text in here,ThemeGallery is a Design Digital

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