Arsenic removal from upstream water is due to adsorption and precipitation of Sn on sediments, while dilution also plays an important role downstream. 上游水体中砷含量的降低主要是吸附沉淀作用,而溪流的简单稀释作用在下游也显得非常重要。
Based on experimental research, the author recommends the chemical oxidation with sodium chlorate and the adsorption precipitation with aluminium sulfate for the wastewater treatment of semiconductor factory. Some treatment conditions are put forward. 作用根据实验研究,提出了半导体生产废水处理的氯酸钠化学氧化法和硫酸铝吸附共沉淀法,并说明了有关处理条件。
Removal of arsenic from drinking water by adsorption onto modified bone char, or coagulation and precipitation, and a metal compounding material; 饮水除砷,采用铁盐改性骨炭(集中式供水)、混凝沉淀(分散式供水)及金属复合材料(净水器装置)除砷;
The asphalt was divided into four fractions by alumina containing 1% water used as adsorbent liquid adsorption chromatography with normal n-heptane precipitation, they were saturates, aromatics, resins and asphaltene. 采用正庚烷溶剂沉淀和1%H2O-Al2O3吸附色谱法将沥青分成饱和分、芳香分、胶质和沥青质4个组分。
Research on Single-step Defluorination in Wet-process Phosphoric Acid Production with Adsorption Precipitation Method 湿法磷酸生产中吸附沉淀法一步脱氟净化的研究
Several enriching processes of recovering palladium from waste alumina catalyst, such as complexation by ammonia and precipitation by acid, adsorption by active carbon and resin, reduction by zinc plates, and precipitation by sulfureted sodium, have been studied in this paper. 研究了从氧化铝废催化剂中回收钯的几种富集方法:氨络合-酸化沉淀法,活性炭、树脂吸附法,锌片还原法,硫化钠沉淀法。
The results demonstrate that the distributions and transport of metal elements of SPM in the estuarine area are mainly flocculation, adsorption, desorption and precipitation, etc. 悬浮物中各种金属元素在河口的分布和迁移过程主要有絮凝、吸附、解吸和沉淀等。
An adsorption precipitation process of Cr from Cr ( VI) to Cr3+ and to Cr ( OH) 3 was proved by absorption spectroscopy during pyrite treatment of Cr ( VI)-bearing wastewater. 吸收光谱表征表明,黄铁矿处理含Cr(Ⅵ)酸性废水,是一个由Cr(Ⅵ)→Cr3+→Cr(OH)3的吸附沉淀过程。
The action mechanism of hydrated paste powder of AASCM with Sr~ ( 2+) includes both adsorption and precipitation at higher initial concentration while there is only adsorption with Cs~+. AASCM水化物粉体与Sr2+的作用在母液浓度较大时存在吸附和沉淀双重机制,与Cs+的作用则主要是吸附机制;
And also, iron oxides with high surface activity, may promote the adsorption and precipitation of heavy metals in the paddy slurry, which determine the availability and mobility of the heavy metals effectively. 而且含铁氧化物具有较高的表面活性,可以通过吸附沉淀影响污染物在土壤中的存在形态和迁移能力。
Chemical transform items including phosphorus adsorption and precipitation action are considered in the solute model. 在传统的溶质运动模型基础上添加化学转化项形成了具有磷的反应特点的溶质运动模型。
Study on the accumulation mechanism of Cd and Pb in radish roots showed that in the first 12 hours the accumulation process of Pb in roots was probably due to rapid adsorption, later, to slow chemical precipitation and cell absorption. 根系对铅的富集过程可能包含吸附反应和慢速的化学沉淀反应和细胞吸收过程。前12小时为快速反应阶段,12小时后为慢速反应阶段。
Using the adsorption method on porous nanometer SiO_2 surfaces that were obtained by chemistry precipitation method preparation loaded silver, with the antibacterial circle diameter of the loading silver powder characterizing antibacterial performance. 以化学沉淀法制备得到多孔纳米SiO2,采用吸附法在其表面负载银,用载银的粉体抑菌圈直径表征抗菌性能。
The adsorption in redox zone do not have a obvious role in uranium precipitation. 粘土矿物的吸附作用在过渡带铀的沉淀过程中并不起明显作用。
SAT removes pollutants from effluent by mechanical filtration, biological and chemical degradation of organic matter, adsorption/ desorption, oxidation/ reduction, precipitation/ dissolution, and synthesis of secondary minerals. 该系统通过对污染物的机械过滤、生物化学转化和降解过程、吸附/解吸过程、氧化/还原过程、沉淀/溶解过程、以及矿物的合成过程净化污水。
The advantage of the cross-linking mycelium to Cr 3+ adsorption is to combine the adsorption process with alkali precipitation, so the treatment of Cr 3+ by the cross-linking mycelium was simple and the cost was decreased. 交联菌丝体吸附剂对Cr3+的吸附特点是将沉淀法与吸附法相结合,将沉淀与吸附两过程合二为一,从而简化了处理工艺,降低了处理成本。
The effects of magnetic seed, aluminum sulphate and pH value on phosphorus adsorption, precipitation and coagulation were surveyed. The results made it clear that Al ( III) ion as precipitant and coagulant was the main effect factor on P removal; 研究了磁种、硫酸铝、pH值等对磷的吸附、沉淀、凝聚的影响,结果表明:铝(Ⅲ)离子的沉淀作用是除磷的主要原因;
Adsorption, precipitation, flocculation, filtering and biodegradation are commonly operated in the system. 废水在吸附、絮凝、沉降、过滤和微生物降解等协同作用下,取得了良好的处理效果。
Nowadays, the main defluoridation processes include adsorption, ion exchange, reverse osmosis, chemical precipitation and electrodialysis. 当今,饮用水除氟的主要方法有吸附法、离子交换法、反渗透法、絮凝沉淀法和电渗析法等。
Adsorption and Precipitation Mechanism of Petroleum Asphaltene and its Influence Factors 石油沥青质的吸附、沉淀机理及其影响因素
The existense of reductants such as H 2S is the basic factor leading to the decrease of Eh in environments and the oversaturation of UO 2+ 2 at the redox front in groundwater, thus accelerating the adsorption and the precipitation of uranium. H2S等还原剂的存在是环境Eh值下降的主要原因,从而使水中的UO2+2在氧化还原过渡带处于过饱和状态,加速了铀的吸附和沉淀。
Those included: ( 1) adsorption ( ion exchange, specific adsorption, co-precipitation, surface complexation). 包括:(1)吸附(离子交换、专性吸附、共沉淀和表面络合);
Substantial component in the amorphous mainly heavy metal ions are formed by water adsorption of colloidal hydroxide precipitation, by co-precipitation. 组分中的大量非晶质体主要是由水体中重金属离子形成氢氧化物胶体吸附沉淀、共沉淀而成。
The bioavailability of P is low in soils because of adsorption and precipitation, and P deficiency is a major constraint to crop productivity. 由于土壤中磷很容易被吸附固定,所以土壤中磷的生物有效性很低,缺磷成为限制作物产量的重要因素。
The Cr ( VI) adsorption of organic soil mainly through the ionic exchange and the complex compound precipitation way, the sour modified bentonite adsorbs mainly dependence on the upper edge surface electric of crystal. 有机土对Cr(VI)的吸附主要通过离子交换和络合物沉淀方式,酸改性膨润土对Cr(VI)吸附主要依靠晶层端面电荷的表面吸附。
Adsorption methodology could overcome the problems existed in chemical precipitation and biological treatment. 吸附法能克服存在于化学沉淀法及生物处理法的那些缺点。
The main work is detecting the components of 7-ACA production wastewater, pretreating the waste, and separating amino adipic acid by the resin adsorption and isoelectric precipitation. 本课题主要包括对7-ACA生产废水成分进行检测、对废液进行预处理,然后采用树脂吸附、等电点沉淀进行分离-氨基己二酸。
Nowadays, the mainly treatment of Fluoride at home and abroad in drinking water containing adsorption, ion exchange, reverse osmosis, Flocculation and precipitation, electrodialysis and electro flocculating method. 目前国内外高氟饮用水的处理方法主要有吸附法、离子交换法、反渗透法、絮凝沉淀法、电渗析法和电聚凝法等。
However, the adsorption and precipitation of biomacromolecule on the ultrafiltration membrane surface causes membrane fouling. Membrane fouling constitutes a bottleneck of ultrafiltration development. 由生物大分子在膜表面吸附和沉积导致的膜污染是制约超滤应用的瓶颈。