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class="details-title border-bottom1"> <h1 class='m-0'>生態(tài)環(huán)境部發(fā)布首個(gè)國家生態(tài)環(huán)境基準《淡水水生生物水質(zhì)基準—鎘》（2020年版）及其技術(shù)報告</h1> <div id="wwaqwuq" class="info font-weight-300"> <span>2020-03-03 15:56:26</span> <span></span> <span> <i class="icon wb-eye m-r-5" aria-hidden="true"></i> 63 </span> </div> </section> <section class="met-editor clearfix"> <p style="text-align: center;"><span style="font-family: 宋體, SimSun;">生態(tài)環(huán)境部發(fā)布首個(gè)國家生態(tài)環(huán)境基準《淡水水生生物水質(zhì)基準—鎘》（2020年版）及其技術(shù)報告</span></p><p><span style="font-family: 宋體, SimSun;"> 日前, 生態(tài)環(huán)境部發(fā)布我國首個(gè)生態(tài)環(huán)境基準——《淡水水生生物水質(zhì)基準—鎘》（2020年版）（公告2020年11號）及其技術(shù)報告。</span></p><p><span style="font-family: 宋體, SimSun;"> 生態(tài)環(huán)境基準是在特定條件和用途下，環(huán)境因子（污染物質(zhì)或有害要素）對人群健康與生態(tài)系統不產(chǎn)生有害效應的最大劑量或水平。生態(tài)環(huán)境基準研究以環(huán)境暴露、毒性效應和風(fēng)險評估為核心，揭示環(huán)境因子對人群健康和生態(tài)安全影響的客觀(guān)規律，研究結果是制修訂生態(tài)環(huán)境質(zhì)量標準、評估生態(tài)環(huán)境風(fēng)險以及進(jìn)行生態(tài)環(huán)境管理的科學(xué)依據，也是構建國家生態(tài)環(huán)境風(fēng)險防范體系的重要基石。從揭示客觀(guān)規律看，生態(tài)環(huán)境基準具有普適性，由于自然地理和生態(tài)系統構成等方面的差異，也會(huì )使這種客觀(guān)規律呈現一定的地域特殊性，需要各國乃至各地區根據實(shí)際情況開(kāi)展針對性研究。</span></p><p><span style="font-family: 宋體, SimSun;"> 我國生態(tài)環(huán)境基準研究處于起步階段，科研積累有限。鑒于鎘的淡水水生生物毒性研究較多，基礎數據相對充足、能夠滿(mǎn)足基準制定數據要求，生態(tài)環(huán)境部決定從研制《淡水水生生物水質(zhì)基準—鎘》入手，通過(guò)實(shí)踐了解影響生態(tài)環(huán)境基準制定的關(guān)鍵環(huán)節，逐步推動(dòng)國家環(huán)境基準管理體系走向成熟。鎘具有高毒性、易解離、易殘留等特點(diǎn)，達到一定濃度后會(huì )對水生生物及生態(tài)系統產(chǎn)生有害影響。許多國家和國際組織（國際標準化組織、歐洲標準化委員會(huì )、美國國家標準學(xué)會(huì )等）將其納入水體基本監測指標，也是我國《地表水環(huán)境質(zhì)量標準》（GB3838-2002）24項基本項目之一。<br/></span></p><p><span style="font-family: 宋體, SimSun;"> 淡水水生生物鎘水質(zhì)基準推導過(guò)程中，共納入1137篇中英文文獻和7907條毒性數據庫數據，經(jīng)質(zhì)量評價(jià)后344條數據為可靠數據，涉及65種淡水水生生物，基本代表了我國淡水水生生物區系特征，涵蓋了草魚(yú)、鳙魚(yú)等我國淡水水生生物優(yōu)勢種。根據我國地表水水體硬度分布情況，基準推導將水體硬度（以CaCO3計）分為50 mg/L、100 mg/L、150 mg/L、200mg/L、250 mg/L、300 mg/L、350 mg/L、450 mg/L八個(gè)等級。在對每個(gè)物種的急、慢性毒性值進(jìn)行水體硬度校正后，基于物種敏感度分布法，推導出鎘的短期水質(zhì)基準和長(cháng)期水質(zhì)基準，反映現階段地表水環(huán)境中鎘對95%的中國淡水水生生物及其生態(tài)功能不產(chǎn)生有害效應的最大濃度。<br/></span></p><p><span style="font-family: 宋體, SimSun;"> 《淡水水生生物水質(zhì)基準—鎘》（2020年版）及其技術(shù)報告由生態(tài)環(huán)境部法規與標準司組織制定，中國環(huán)境科學(xué)研究院依據《淡水水生生物水質(zhì)基準制定技術(shù)指南》（HJ 831—2017）起草。隨著(zhù)科學(xué)研究的不斷發(fā)展，基準將適時(shí)修訂和更新。</span><br/></p><p><br/></p> </section> <div id="om2y4qq" class='met-page p-y-30 border-top1'> <div id="2egm222" class="container p-t-30 "> <ul class="pagination block blocks-2 text-xs-center text-sm-left"> <li id="0ymqii4" class='page-item m-b-0 '> <a href='../xw/shownews.php?id=373' title="江西創(chuàng )新服務(wù)平臺利用現代科技手段推進(jìn)科學(xué)治污" class='page-link 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