三价砷

若源水中含有三价砷，可在混凝沉淀前将其氧化。

If arsenite existed in source water , it was oxidated before coagulation_precipitation .

砷的应用范围广、毒性大，尤其是三价砷。

The arsenic is applied abroad , and is a toxic trace element , especially arsenite .

三价砷和五价砷的吸附等温线对Langmuir和Freundlich模型都有良好的相关性。

The adsorption isotherm of arsenate and arsenite fits Langmuir and Freundlich adsorption isotherm model well .

安徽铜陵尾矿堆中三价砷抗性菌株的分离、鉴定及16Srdna分析

Isolation , identification and 16S rDNA sequences analysis of arsenic-resisting bacteria from mine tailing dumps of Tongling in Anhui Province

在利用硫酸铁去除五价砷[As（V）]的基础上研究了三价砷[As（III）]的氧化及去除，以寻求适合于分散式饮水中As（III）的氧化方法。

The feasible methods for oxidation and removal of arsenite [ As (ⅲ) ] from dispersed drinking water were based on the removal of arsenate [ As ( V ) ] by ferric sulfate .

新生态二氧化锰悬浊液的制备及对三价砷氧化吸附机理的探讨

Preparation of Nascent Manganese Dioxide and Discussion on the Mechanism of Oxidative Adsorption to Arsenic

三价砷氧化技术初步研究

Tentative Study on Arsenite Oxidation

其中三价砷比五价砷毒性更强、更不稳定、更不容易去除。

And trivalent arsenic has stronger toxicity , more stability and more difficult to remove than pentavalent arsenic .

并且，三价砷在自然状态下氧化成五价砷的速度较慢。

Moreover , trivalent arsenic in the natural environment oxidized to pentavalent arsenic is a very slow process .

另1例患者在发病26年前有明显接触三价砷的历史。

The other is a case who had a history of close contact with trivalent arsenicals 26 years ago .

考察了不同的紫外光照射情况对三价砷和五价砷吸附机理的影响。

And try to find the different effect of different UV irradiation conditions on arsenate and arsenite adsorption mechanism .

结论亚砷酸钠可抑制淋巴细胞活力，抗氧化物可一定程度的拮抗三价砷的细胞毒性作用。

Conclusion Sodium arsenite can inhibit the survival of lymphocytes of rats and the antioxidants can antagonize the cytotoxicity of arsenic .

巯基与铜、汞、铅和三价砷反应初步研究

Preliminary Study on Reactions of Sulfhydryl Group with Cu 2 + , Hg 2 + , Pb 2 + and Arsenides

本研究结果表明，次氯酸钠是一种效果可靠、经济技术可行的分散式饮水三价砷的氧化剂。

It is suggested that javelle water is an effective , economic and technologic feasible oxidationagent for removing arsenite from dispersed drinking water .

三价砷可以与一些重要蛋白上的密集的半胱氨酸残基作用，进而发挥其生物学效应。

The biological effects of arsenic ( principally the trivalent forms ) may be mediated by reactions with closely spaced cysteine residues on critical cell proteins .

结论硫酸铁、硫酸铝及其混合物是较实用的分散式饮水除砷剂，次氯酸钠为适宜的三价砷氧化剂。

Conclusions Ferric sulfate and aluminum sulfate and their mixture were feasible for removing arsenic from decentralized drinking water system . And sodium hypochlorite was an effective oxidant for arsenite .

本论文的目的：首先建立一种快速测定水中三价砷和五价砷的方法；其次合成一种负载型Mn/TiO2光催化剂和吸附剂，并将其应用于砷的处理体系中。

The first purpose of this paper is to establish a rapid determination of trivalent arsenic and pentavalent arsenic method in water , secondly , to synthesize loaded Mn / TiO2photocatalyst and adsorbent and apply it to the arsenic treatment system .

三价的砷，包括亚砷酸钠及可溶性更高的As203可以通过与带有含硫基团的蛋白作用从而抑制体内很多种酶的活性。

Trivalent arsenicals , including sodium arsenite and the more soluble arsenic trioxide , inhibit many enzymes by reacting with biological ligands that possess available sulfur groups .

因此，在除砷前将三价氧化成为五价砷是强化除砷的有效途径。

Therefore , it is an effective way to oxidized trivalent arsenic to pentavalent arsenic when we remove arsenic in the water .