推薦產(chǎn)品
3-(4-chlorophenyl)-4-phenyl-4,5-dihydro-1H-pyrazole 2-(chloromethyl)-3-methylpyridinehydrochloride 1-(2-bromo-4-methylphenyl)ethanone 3-chloroisoquinoline-4-carbonitrile 5,8-dichloropyrido[3,2-d]pyridazine 2-bromomalononitrile 2-(4-(bromomethyl)phenyl)benzo[d]thiazole 1-(bromomethyl)-3-methoxy-2-nitrobenzene 6-bromo-1H-[1,2,3]triazolo[4,5-b]pyridine 4-iodo-2-((trimethylsilyloxy)methyl)thiazole 6-iodoimidazo[1,2-a]pyridine-3-carbonitrile 2-(4-chlorophenyl)-2-morpholinoacetonitrile 4-chloro-7H-pyrrolo[2,3-d]pyrimidine 4-chloroisothiazole 5-bromo-6-chloro-1H-indole 7-chloro-3H-imidazo[4,5-b]pyridine ethyl3-(4-formylphenyl)propanoate 2,3-dibromobenzaldehyde 1-(5H-chromeno[2,3-b]pyridin-7-yl)ethanone 5H-chromeno[2,3-b]pyridin-5-one 3-chloroisoquinoline-4-carbaldehyde (E)-2-(3-oxoprop-1-enyl)benzaldehyde methyl4-formyl-3-nitrobenzoate 5,6-dimethoxy-2,2-dimethyl-2,3-dihydro-1H-inden-1-one 1-methylbicyclo[4.1.0]heptan-3-one 3-nitro-4-(trifluoromethoxy)benzaldehyde 2-hydroxyquinoline-6-carbaldehyde 2-nitro-3-(trifluoromethyl)benzaldehyde 1-(2-fluoro-4-methoxyphenyl)propan-2-one tert-butyl3-fluoro-4-oxopiperidine-1-carboxylate tert-butyl3-oxopropylcarbamate 2,2-dimethylcyclohexanone 9H-carbazole-3-carbaldehyde N,N-dimethyl-2-oxoacetamide 2-methylpent-4-yn-2-ol 3-tert-butyl-4-hydroxybenzonitrile 4-bromo-2-tert-butylphenol 1,3-dibutoxypropan-2-ol methyl4-hydroxyquinoline-6-carboxylate methyl3-cyano-4-hydroxybenzoate 4-chloro-6-methoxyquinolin-7-ol 3,4-dihydro-2H-benzo[b][1,4]oxazin-7-ol 2-(2-aminothiazol-5-yl)ethanolhydrochloride (R)-ethyl2-chloropropanoate (S)-4-amino-5-(4,4-dimethylcyclohexylamino)-5-oxopentanoicacid (1s,4s)-4-hydroxycyclohexanecarboxylicacid (S)-2-(tetrahydrofuran-3-yloxy)aceticacid (1S,4R)-1-methyl-4-(prop-1-en-2-yl)cyclohex-2-enol (R)-4-(hydroxymethyl)oxazolidin-2-one (S)-4-(hydroxymethyl)oxazolidin-2-one 化工資訊 原文標(biāo)題：警惕進(jìn)口伴生放射性礦產(chǎn)品放射性超標(biāo)
伴生放射性礦產(chǎn)品是我國(guó)緊缺的資源。近期，湛江檢驗(yàn)檢疫局在對(duì)湛江口岸進(jìn)口伴生放射性礦產(chǎn)品進(jìn)行檢驗(yàn)監(jiān)管和監(jiān)測(cè)中，就發(fā)現(xiàn)有13批、6027噸進(jìn)口鈦礦砂和鋯英砂γ射線劑量當(dāng)量率高于本底值的10倍以上，最高達(dá)48倍，放射性超標(biāo)率占檢測(cè)進(jìn)口總批次的21%，這些礦產(chǎn)品若未進(jìn)行有效監(jiān)管和處置，將對(duì)我國(guó)環(huán)境安全和公眾健康安全造成嚴(yán)重危害，須引起關(guān)注和警惕。
伴生放射性礦，是指含有較高水平天然放射性核素濃度的非鈾礦(如稀土礦和磷酸鹽礦等)。伴生放射性礦產(chǎn)品除了含所需的礦用成份外，同時(shí)伴生有高于規(guī)定水平的天然放射性物質(zhì)，在開(kāi)采、冶煉、加工和利用過(guò)程中，由于伴生礦中的天然放射性物質(zhì)被遷移、濃集擴(kuò)散，對(duì)環(huán)境造成一定程度的放射性污染。如進(jìn)口鋯英砂被廣泛應(yīng)用鑄造、陶瓷、冶金、光學(xué)玻璃和耐火材料等行業(yè)，也用于鈦合金、醫(yī)藥、油漆、制革、磨料、化工以及核工業(yè)。目前國(guó)內(nèi)鋯英砂礦產(chǎn)量較少，大部分依賴進(jìn)口。而鋯英砂礦中天然伴生釷、鈾、鐳及鉀等放射性礦物，被檢出放射性超標(biāo)案例卻屢見(jiàn)不鮮。其放射性超標(biāo)容易致癌、致畸和致基因突變，且放射性物質(zhì)難以銷毀處理，在運(yùn)輸和加工過(guò)程將會(huì)對(duì)人體產(chǎn)生危害并污染環(huán)境，對(duì)環(huán)境、水質(zhì)造成長(zhǎng)期性污染。
為加強(qiáng)進(jìn)口伴生放射性礦產(chǎn)品的質(zhì)量安全把關(guān)，維護(hù)相關(guān)礦產(chǎn)品的正常貿(mào)易，并避免給國(guó)家環(huán)境安全和公眾健康安全造成危害，檢驗(yàn)檢疫部門(mén)建議外貿(mào)企業(yè)要謹(jǐn)慎簽訂貿(mào)易合同。企業(yè)進(jìn)口伴生放射性礦產(chǎn)品，應(yīng)先取得省級(jí)環(huán)保部門(mén)的環(huán)保批文，才可以簽訂進(jìn)口合同，同時(shí)，企業(yè)在簽訂外貿(mào)合同時(shí)，應(yīng)明確提出我國(guó)對(duì)放射性的限量要求，否則一旦檢出天然放射性核素活度濃度超出國(guó)家標(biāo)準(zhǔn)，其貨物將面臨退運(yùn)處理，造成不必要的經(jīng)濟(jì)損失。
