本文關(guān)鍵詞：改性黏土除藻的絮凝形態(tài)學(xué)特征初步研究　出處：《海洋學(xué)報(bào)》2017年06期 　論文類型：期刊論文

  更多相關(guān)文章： 赤潮治理 改性黏土 絮凝形態(tài)學(xué) 絮凝體 觀測(cè)方法

【摘要】：在理論上改性黏土絮凝體的形態(tài)變化對(duì)其除藻過(guò)程有指示作用,可作為改性黏土用量和用法調(diào)控的依據(jù),本文探討了現(xiàn)有絮凝顆粒形態(tài)學(xué)觀測(cè)與分析方法在改性黏土除藻效率評(píng)價(jià)上的適用性。借助激光顆粒表征技術(shù)和電子顯微成像技術(shù),本文觀測(cè)了改性黏土除藻時(shí)的顆粒表面電性、粒徑分布、絮凝體結(jié)構(gòu)等絮凝形態(tài)學(xué)特征,分析了其與除藻效率的相關(guān)性。結(jié)果表明,現(xiàn)有觀測(cè)方法可以表征改性導(dǎo)致的黏土顆粒Zeta電位反轉(zhuǎn)、改性前后黏土在不同介質(zhì)中的顆粒粒級(jí)分布差異、以及改性黏土與微藻形成絮凝體的多種顯微結(jié)構(gòu);但由于較大粒徑絮體對(duì)現(xiàn)有方法觀測(cè)結(jié)果的影響更大,各種黏土的粒徑特征與其除藻效率之間沒有顯著的相關(guān)性。現(xiàn)有觀測(cè)方法獲得的改性黏土顆粒形態(tài)特征仍不能反映其消除藻細(xì)胞的精細(xì)過(guò)程,特別是由于缺乏有效的絮凝體形態(tài)分析方法而導(dǎo)致現(xiàn)有形態(tài)參數(shù)還不能指示除藻效率的變化,亟需發(fā)展適用于改性黏土法除藻過(guò)程的顆粒形態(tài)分析新方法。
[Abstract]:In theory, the morphological changes of modified clay flocculants can indicate the process of algae removal, and can be used as the basis for the control of the amount of modified clay and its usage. In this paper, the applicability of the existing methods of morphological observation and analysis of flocculating particles in the evaluation of algal removal efficiency of modified clay is discussed, with the aid of laser particle characterization and electron microscopic imaging. In this paper, the surface electrical properties, particle size distribution and flocculation structure of the modified clay were observed, and the correlation between the morphology and the efficiency of algae removal was analyzed. The existing observation methods can be used to characterize the Zeta potential reversal of clay particles resulting from the modification, and the particle size distribution of clay particles in different media is different before and after modification. And various microstructures of flocculant formed by modified clay and microalgae; However, the larger particle size floc has a greater influence on the observed results of the existing methods. There was no significant correlation between the particle size characteristics of various clay and its algal removal efficiency. The morphological characteristics of modified clay obtained by the existing observation methods still could not reflect the fine process of its removal of algal cells. In particular, due to the lack of effective flocculant morphology analysis method, the present morphological parameters can not indicate the change of algae removal efficiency, so it is urgent to develop a new method of particle morphology analysis suitable for the process of algal removal by modified clay method.
【作者單位】： 中國(guó)科學(xué)院海洋研究所海洋生態(tài)與環(huán)境科學(xué)重點(diǎn)實(shí)驗(yàn)室;青島海洋科學(xué)與技術(shù)國(guó)家實(shí)驗(yàn)室海洋生態(tài)與環(huán)境科學(xué)功能實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41576119) 國(guó)家自然科學(xué)基金委員會(huì)-山東省人民政府聯(lián)合資助海洋科學(xué)研究中心項(xiàng)目(U1606404) 海洋公益性行業(yè)科研專項(xiàng)項(xiàng)目(201305003)
【分類號(hào)】：X55
【正文快照】： 1引言黏土法被認(rèn)為是最有發(fā)展前景的赤潮防治方法[1—2]。而改性黏土法可以大大提高黏土的除藻效率、顯著降低材料用量[3]。近10年來(lái),改性黏土法治理赤潮得到快速推廣,先后在我國(guó)從南到北的許多赤潮暴發(fā)水域內(nèi)得到成功應(yīng)用,例如2008年在青島奧帆賽場(chǎng)及鄰近海應(yīng)急消除86km2卡盾

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本文編號(hào)：1377823