久久久久蜜桃精品成人片_亚洲欧洲美洲无码精品VA_国产亚洲精品精品国产亚洲综合_亚洲色欲一区二区三区在线观看

水資源污染不容小覷 水污染原因多種多樣

時間:2019-01-18 作(zuo)者:中國化工儀器 閱讀:4749

水(shui)是生命之源(yuan)(yuan),是我(wo)們(men)賴(lai)以(yi)生存和發展的(de)基礎,水(shui)的(de)質量直接(jie)關系(xi)著人(ren)們(men)的(de)健(jian)康。隨著國家社會經(jing)濟(ji)的(de)發展,我(wo)國的(de)水(shui)污(wu)染現象越(yue)來(lai)越(yue)嚴重,如(ru)今(jin)安全的(de)水(shui)源(yuan)(yuan)也越(yue)來(lai)越(yue)少(shao)。

自2018年以來,環(huan)保(bao)話題一直被人(ren)們所(suo)關注。眾望所(suo)歸(gui)的新環(huan)保(bao)法(fa)自1月(yue)1日起施(shi)行(xing)(xing)(xing),作為中國現(xian)行(xing)(xing)(xing)法(fa)律(lv)中最嚴格的一部專業(ye)領域(yu)行(xing)(xing)(xing)政法(fa)明確了政府(fu)、企業(ye)和(he)公眾各(ge)方的責任(ren)和(he)義(yi)務,并加大(da)對違法(fa)排污的懲罰力度,規定了一系列強制性懲罰措施(shi)。

有報道稱(cheng),中國是世界上水污染(ran)治理“最活躍”的國家,這(zhe)其中蘊含了一個令人不愿(yuan)直視的真相——我(wo)國的水污染(ran)很嚴(yan)重。

那么,中(zhong)國(guo)的(de)(de)水(shui)(shui)(shui)污染現狀究竟如何呢?中(zhong)國(guo)本就是一(yi)個(ge)嚴(yan)(yan)重缺水(shui)(shui)(shui)的(de)(de)國(guo)家,660座城市(shi)中(zhong)有400多座城市(shi)缺水(shui)(shui)(shui)。三分(fen)之(zhi)二的(de)(de)城市(shi)存在供(gong)水(shui)(shui)(shui)不足,中(zhong)國(guo)城市(shi)年(nian)缺水(shui)(shui)(shui)量為60億(yi)立方米左右,其中(zhong)缺水(shui)(shui)(shui)比較嚴(yan)(yan)重的(de)(de)城市(shi)有110個(ge),中(zhong)國(guo)是世界上13個(ge)貧水(shui)(shui)(shui)國(guo)家之(zhi)一(yi),淡水(shui)(shui)(shui)資源還不到世界人均水(shui)(shui)(shui)量的(de)(de) 1/4。

中國北(bei)方五(wu)省區和海河流域地下(xia)(xia)水(shui)(shui)資源也非常短缺(que),無論是農村還是城(cheng)市(shi)(shi)(shi),淺(qian)層水(shui)(shui)或(huo)深層水(shui)(shui)均遭到(dao)不同(tong)程度(du)的(de)污染(ran)。具體而言(yan),根據北(bei)方五(wu)省區(新疆、甘肅、青海、寧夏、內蒙古)1995眼地下(xia)(xia)水(shui)(shui)監測井點的(de)水(shui)(shui)質資料,按照《地下(xia)(xia)水(shui)(shui)質量標準》(GB/T14848-93)進(jin)行評價(jia)(jia),結果表明,在(zai)69個(ge)(ge)城(cheng)市(shi)(shi)(shi)中,Ⅰ類(lei)(lei)水(shui)(shui)質的(de)城(cheng)市(shi)(shi)(shi)不存(cun)在(zai),Ⅱ類(lei)(lei)水(shui)(shui)質的(de)城(cheng)市(shi)(shi)(shi)只有(you)10個(ge)(ge),只占14.5%,Ⅲ類(lei)(lei)水(shui)(shui)質城(cheng)市(shi)(shi)(shi)有(you)22個(ge)(ge),占31.9%,Ⅳ、Ⅴ類(lei)(lei)水(shui)(shui)質的(de)城(cheng)市(shi)(shi)(shi)有(you)37個(ge)(ge),占評價(jia)(jia)城(cheng)市(shi)(shi)(shi)總數的(de)53.6%,即1/2以上城(cheng)市(shi)(shi)(shi)的(de)城(cheng)市(shi)(shi)(shi)地下(xia)(xia)水(shui)(shui)污染(ran)嚴(yan)重(zhong)。

水(shui)(shui)(shui)資源污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)的(de)(de)(de)現(xian)象(xiang)日(ri)益嚴重(zhong)(zhong)(zhong),引(yin)起(qi)水(shui)(shui)(shui)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)的(de)(de)(de)原因(yin)也(ye)亟需(xu)引(yin)起(qi)人們的(de)(de)(de)重(zhong)(zhong)(zhong)視。在重(zhong)(zhong)(zhong)多(duo)水(shui)(shui)(shui)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)的(de)(de)(de)成因(yin)中,工(gong)(gong)(gong)業(ye)引(yin)起(qi)的(de)(de)(de)水(shui)(shui)(shui)體(ti)(ti)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)最為嚴重(zhong)(zhong)(zhong)。如:工(gong)(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran),工(gong)(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)所含的(de)(de)(de)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)物多(duo),并且成分(fen)復(fu)雜,不(bu)僅在水(shui)(shui)(shui)中不(bu)易凈化(hua)(hua),而(er)且處理也(ye)比較困難。除了工(gong)(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran),工(gong)(gong)(gong)業(ye)排出的(de)(de)(de)固體(ti)(ti)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)物和氣體(ti)(ti)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)物也(ye)會污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)水(shui)(shui)(shui)體(ti)(ti),例如酸(suan)雨(yu)(yu)(yu)現(xian)象(xiang),酸(suan)雨(yu)(yu)(yu)是雨(yu)(yu)(yu)、雪等在形成和降落過程中,吸收并溶解了空氣中的(de)(de)(de)二氧化(hua)(hua)硫、氮氧化(hua)(hua)合(he)物等工(gong)(gong)(gong)業(ye)化(hua)(hua)合(he)物質,形成了pH低(di)于5.6的(de)(de)(de)酸(suan)性(xing)降水(shui)(shui)(shui)。因(yin)此,酸(suan)雨(yu)(yu)(yu)等現(xian)象(xiang)也(ye)不(bu)斷(duan)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)了我(wo)國的(de)(de)(de)水(shui)(shui)(shui)質,使(shi)我(wo)國水(shui)(shui)(shui)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)(ran)問題日(ri)益嚴重(zhong)(zhong)(zhong)。

 其次嚴重的(de)(de)是(shi)農(nong)(nong)業污(wu)(wu)染(ran),農(nong)(nong)業污(wu)(wu)染(ran)是(shi)指由(you)于(yu)耕作或(huo)開(kai)荒(huang)使(shi)土(tu)地表(biao)面疏松,在(zai)強降雨的(de)(de)情況下,大(da)量泥沙流(liu)入(ru)水(shui)(shui)(shui)(shui)中(zhong)(zhong),增(zeng)加水(shui)(shui)(shui)(shui)中(zhong)(zhong)的(de)(de)懸浮(fu)物。或(huo)由(you)于(yu)農(nong)(nong)藥、化肥(fei)的(de)(de)使(shi)用量日益增(zeng)多,大(da)量的(de)(de)農(nong)(nong)藥、化肥(fei)殘留沉淀(dian)到地下水(shui)(shui)(shui)(shui)中(zhong)(zhong),或(huo)者(zhe)漂浮(fu)在(zai)大(da)氣中(zhong)(zhong),通過(guo)降雨現象,污(wu)(wu)染(ran)了(le)地表(biao)的(de)(de)水(shui)(shui)(shui)(shui)資源(yuan)。農(nong)(nong)業水(shui)(shui)(shui)(shui)污(wu)(wu)染(ran)主要是(shi)由(you)于(yu)農(nong)(nong)業源(yuan)的(de)(de)COD(化學需氧量)總氮和總磷排(pai)放形成的(de)(de),占總排(pai)放量的(de)(de)40%以(yi)上。農(nong)(nong)業水(shui)(shui)(shui)(shui)污(wu)(wu)染(ran)具有位(wei)置、途徑、數(shu)量不(bu)確定,隨機性大(da),發布(bu)范圍廣,防治難度大(da)等(deng)特點。

還(huan)有一個造成水(shui)污(wu)(wu)染(ran)的(de)原因(yin)是(shi)城(cheng)市(shi)(shi)污(wu)(wu)染(ran)源,因(yin)為城(cheng)市(shi)(shi)人口相對(dui)(dui)集(ji)中(zhong),城(cheng)市(shi)(shi)生活(huo)(huo)污(wu)(wu)水(shui)、垃圾和廢(fei)氣(qi)引起的(de)水(shui)體污(wu)(wu)染(ran)也不(bu)容忽視。城(cheng)市(shi)(shi)污(wu)(wu)染(ran)源對(dui)(dui)水(shui)體的(de)污(wu)(wu)染(ran)主(zhu)要是(shi)生活(huo)(huo)污(wu)(wu)水(shui),它是(shi)人們(men)日常生活(huo)(huo)中(zhong)產生的(de)各種污(wu)(wu)水(shui)的(de)混合液,其(qi)中(zhong)包括廚房、洗滌(di)房、浴室(shi)和廁所排出的(de)污(wu)(wu)水(shui)。生活(huo)(huo)污(wu)(wu)水(shui)中(zhong)主(zhu)要含有氮(dan)、磷等(deng)污(wu)(wu)染(ran)物。污(wu)(wu)水(shui)不(bu)經(jing)處(chu)理直(zhi)接(jie)排到地(di)(di)面經(jing)土(tu)壤下滲或匯入地(di)(di)表水(shui)體,對(dui)(dui)地(di)(di)表水(shui)及(ji)地(di)(di)下水(shui)造成直(zhi)接(jie)危害。

“保護水(shui)(shui)(shui)(shui)(shui)(shui)資(zi)(zi)源(yuan),人人有責(ze)”,水(shui)(shui)(shui)(shui)(shui)(shui)資(zi)(zi)源(yuan)的保護關乎我(wo)們(men)每一(yi)個人的幸福生(sheng)活,關乎民族未來的大計。科學合理利用水(shui)(shui)(shui)(shui)(shui)(shui)資(zi)(zi)源(yuan)、珍惜(xi)水(shui)(shui)(shui)(shui)(shui)(shui)資(zi)(zi)源(yuan)、節(jie)約水(shui)(shui)(shui)(shui)(shui)(shui)資(zi)(zi)源(yuan),養成(cheng)良好的節(jie)水(shui)(shui)(shui)(shui)(shui)(shui)習慣(guan)是(shi)我(wo)們(men)每一(yi)個應盡的義務,希(xi)望(wang)(wang)我(wo)們(men)每一(yi)個人都(dou)能都(dou)從自身做起,為我(wo)們(men)國家(jia)的水(shui)(shui)(shui)(shui)(shui)(shui)資(zi)(zi)源(yuan)保護盡一(yi)份力,希(xi)望(wang)(wang)不久的將來人人都(dou)能喝上“放心水(shui)(shui)(shui)(shui)(shui)(shui)”。