Compared to wet season, arsenic is difficult to mobile in dry season. Attenuation constant in dry season is 0.3082(1/km), but it is 0.0569(1/km)in wet season. If initial concentration of As was 500μg/L without other contamination source in down stream, arsenic would deceased to 50μg/L in down stream 7.5km in dry season but 40km in down stream 40km. As is dominate species in river running throμgh mining area.

砷在枯水期較豐水期難以遷移狠狠社henhen，通過計算得到在线观看亚洲免费，在枯水期砷的衰減系數(shù)K值為0.3082(1/km)，而在豐水期為0.0569(1/km)午夜性生活黄色片；在污染口濃度達(dá)到500μg/L時农村女人一级特黄大片，下游沒有其它的砷的污染源(或會影響砷衰減的其它污染源)時，枯水期砷會在下游7.5km之后濃度降到50μg/L精品国产午夜理论片，而豐水期則要在下游40km之后才能降到同樣的值日韩专区欧美专区亚洲福利，所以在豐水期砷污染的影響的流域更廣。

The most common methods of removing arsenic from aqueous process streams are by precipitation as arsenic sulfide, calcium arsenate, or ferric arsenate, but it has been suitable for direct disposal to uncontained sites as they will produce leachate containing arsenic.

從水中去除砷是最常用的做法日韩一区二区视频，工藝流程是通過沉淀類似硫化砷亚洲激情小说图片视频、砷酸鈣或者砷酸鐵，由于會產(chǎn)生含砷的瀝出夜粗硬大西欧一级毛片，因此這種方法適合用于不限制排放場所的直接處置日韩一区二区三区无码不卡毛片。

When pH is 10, adsorption time is 30 min, dosage of bone char is 0.6 g/L, the original concentration of As in drinking water is 0.5 mg/L, As removal can reach 95.2%. The adsorption behavior is fitted both with Langmuir and Freundlich isotherm. The adsorption mechanism is supposed to be Ca—OH functional groups combined with anion. And there may occur the co-precipitation between calcium hydrogen arsenate and hydroxylapatite in the aqueous solution, and ions also exchange. The saturation adsorption capacity of As reaches 4.688 mg/g. Indexes of effluent are in good agreement with the WHO stringent drinking water standards (0.01 mg/L).

研究結(jié)果表明：在pH=10，吸附時間為30 min和骨炭加入量為0.6 g/L黄a频美女网站网站频a，飲用水砷初始質(zhì)量濃度為0.5 mg/L時其砷去除率可達(dá)95.2%黄页网站在线播放免费；骨炭吸附砷的行為同時符合Langmuir和Freundlich等溫吸附模型；其吸附機理可能是Ca—OH官能團結(jié)合HASO4陰離子国产一区在线在线播放，并產(chǎn)生砷酸氫鈣和羥基磷灰石的共沉淀18岁的男人看黄色视频，另外還存在離子交換作用；吸附柱的飽和吸附容量為4.688 mg/g精品九九九在线视频免费看；出水砷濃度符合世界衛(wèi)生組織規(guī)定飲水砷標(biāo)準(zhǔn)(0.01 mg/L)男女啪啪视频入口欧美国产。

The results showed that As forms in soils were mainly composed by fixed forms of As when As added at high rate and soil As for ms were mainly composed by labile As,esp.exchangable As,when As added at low rat e.The lability of soil As was improved when astragalusy was added.

結(jié)果表明，外源砷濃度高時土壤砷形態(tài)以固定態(tài)砷為主aigao激情在线视频，外源砷濃度低時以活性態(tài)砷為主深夜15级A毛片免费视频，尤以交換態(tài)砷為主；施入紫云英土壤砷的活性增強99拍一黄色视频,老师；土壤AEC與活性砷含量呈線性正相關(guān)免费AV在线播放不卡。

Methods The selected microorganisms were cultivated at 37℃ in culture media that was put different concentration of sodium arsenite,and detected arsenic accumulation in cells by ASA.

各菌株接種在不同濃度含砷培養(yǎng)基中，觀察其對砷的耐受性及砷對各菌株的生長影響人人人人插人人干人人操；利用超聲波細(xì)胞粉碎機震碎菌體后中日韩人人操人人干，用超低溫捕獲原子吸收分光光度儀檢測砷含量，用熒光光譜檢測器檢測砷形態(tài)91视频专区。

A model was proposed to describe arsenic contamination of groundwater and its influencing factors controlling the processes of arsenic migration and enrichment, which can be used for the strategies making of arsenic contamination control in arseniasis areas.

在此基礎(chǔ)上從砷的&來源－影響因素－影響過程－高砷形成&角度提出了地下水砷污染的成因模式性感xxxxx，對砷中毒病區(qū)的環(huán)境問題調(diào)查與地下水砷污染的防治具有重要參考價值。

It is very peculiar that the region of arsenism and the number of arsenism people caused by burning high arsenic coals.

因此根據(jù)目前國內(nèi)外對煤中砷的研究進展久综合久久，在全國范圍內(nèi)有計劃取樣久久中文字幕乱码久久午，研究中國煤中砷的含量欧美一区日韩在线播放、分布及其影響因素；探討我國煤砷的賦存狀態(tài)黄片少妇；選擇大氣中出現(xiàn)砷異常的西南地區(qū)按摩深夜A级毛片视频免费，研究煤中砷脫洗機理；在室內(nèi)模擬燃燒的基礎(chǔ)上尹人影视，研究燃煤砷排放機制黄色丝袜a片。

A compartmented soil-glass bead culture system was used to investigate characteristics of arsenic accumulation in iron plaque and in mature rice plants irrigated using water with arsenic in greenhouse.

采用土壤-玻璃珠聯(lián)合培養(yǎng)的方式，選擇2個氧化能力不同的水稻品種YY-1久东京热、94D-64和采自浙江富陽的土壤(砷的本底值為13.8 mg.kg-1)国产3p一区二区三区视频在线，并設(shè)灌溉清水和含砷水2個處理(即在分蘗期、拔節(jié)期亚日一级a、孕穗期免费一级A毛片在线播放一级、開花期和灌漿期5個生育階段灌溉含砷污水，隨灌溉水進入土壤中砷的濃度為3.2 mg.kg-1)国产黄片高清无码在线观看，研究了砷在土壤-根表鐵氧化物-水稻系統(tǒng)中的累積規(guī)律以及土壤和灌溉水對水稻秸稈和籽粒富集砷的貢獻(xiàn)程度人人操人人搞人人摸人与马。

A compartmented soil-glass bead culture system was used to investigate characteristics of arsenic accumulation in iron plaque and in mature rice plants irrigated using water with arsenic in greenhouse. Arsenic was supplied as a solution of Na3AsO4·12H2O at the following stages: tillering, stem elongation, booting, flowering and grain filling.

采用土壤-玻璃珠聯(lián)合培養(yǎng)的方式，選擇2個氧化能力不同的水稻品種YY-1欧美日韩美女一区、94D-64和采自浙江富陽的土壤（砷的本底值為13.8 mg·kg-1）自拍日韩制服丝袜视频，并設(shè)灌溉清水和含砷水2個處理（即在分蘗期、拔節(jié)期亚洲污视频在线观看、孕穗期99riav113、開花期和灌漿期5個生育階段灌溉含砷污水，隨灌溉水進入土壤中砷的濃度為3.2 mg·kg-1）国产黄色经典Av片，研究了砷在土壤-根表鐵氧化物-水稻系統(tǒng)中的累積規(guī)律以及土壤和灌溉水對水稻秸稈和籽粒富集砷的貢獻(xiàn)程度欧美激情A∨在线观看。

Theresults indicated that the initial desorption rate of As was higher than As, but thefinal desorption percentage of As was two times higher than As; that in therange of pH(6.5-8.5), the desorption of As was the lowest（pH=6.5）,and thepercentage increased with the pH value increasing or deescalating, but for the As,thepercentage increased with the increase of pH; that the supersonic accelerated desoptionof arsenic and the final percentage was lower than non-supersonic; that on the conditionof UV-light ,in a word, it took negative effect to desorption The"reproduced process"has been used in the procedure of regeneration.

實驗結(jié)果表明，初始階段午夜免费福利视频，三價砷的脫附率高于五價砷日韩精品网站日韩在线观看视频免费，但最終脫附率三價砷低于五價砷；三價砷破苞见红视频在线观看、五價砷在不同溫度下的脫附實驗表明三價砷的最佳脫附溫度低于五價砷的最佳脫附溫度在线播放欧洲免费人成视频；在pH=5.5-8.5時，隨著pH的增大午夜无码福利视频，五價砷的脫附率具有先減小再增大的趨勢，在pH為6.5時脫附率降至最谢粕こ赡晔悠翟谙呖础无码免费黄片；在pH=5.5-8.5時，三價砷的脫附率隨pH的增大而增大18禁无遮挡裸体露私密部位网站；不論是三價砷還是五價砷的脫附過程久久精品国产亚，超聲波條件都會促進脫附速率(來源：ecABC論a4文網(wǎng)www.abclunwen.com)的增加999久久精品国产首页，并且最終的脫附率要高于無超聲波條件下的脫附率；紫外光照條件下高清在线观看国产亚洲AV，隨著光照時間的增加黄网站免费看www，兩種價態(tài)砷的脫附率會達(dá)到一個較高的值，再降低日本阿v片在线中文字幕∨访酪磺雌荆總體而言，紫外光照的存在不利于脫附的進行日本迷奷系列在线播放97野外。

arsenic：砷

大家都曉得,砷(Arsenic)是五價元素,原子外層有五個價電子,如果一個砷原子代替了一個矽原子,那麼砷的四個原子便填上了原來矽四個價電子的位置,但砷的第五個電子無處置身,尷尬得很.

arsenical：[化]砷的, 含砒素的

polynia [地]冰間湖,冰穴(尤指北極海面的未結(jié)冰處) | arsenical [化]砷的, 含砒素的 | equipotential pitch 等位距

arsenical：砷的

arsenic 砷 | arsenical 砷的 | arsenicate 使與砒混合

arsenical：砷的,含砷的

\\"三氧化二砷,砒霜\\",\\"arsenic trioxide\\" | \\"砷的,含砷的\\",\\"arsenical\\" | \\"砷化物\\",\\"arsenical compound\\"

arsenfast：抗砷的

抗蛇毒素antivenin | 抗砷的arsenfast | 抗砷素antiarsenin

arsenious：[化]含砒素的, 含砷的

legged 有腿的 | arsenious [化]含砒素的, 含砷的 | velocity of pulsation 脈振速度

arsenious：亞砷的

arsenide 砷化物 | arsenious 亞砷的 | arseniousacid 亞砷酸

arsenous：砷的

arsenotherapy 砷劑醫(yī)療 | arsenous 砷的 | arsine 三氫砷化

arsenous：砷的, 亞砷的

arsenous hydride | 三氫化砷 | arsenous | 砷的, 亞砷的 | arsenoxide | 氧化砷

cacodylic：二甲砷基的, 四甲二砷的

cacodylate | 甲次砷酸鹽 | cacodylic | 二甲砷基的, 四甲二砷的 | cacodyloxide | 卡可基氧 雙二甲胂基氧