因人类活动（工业、农业）及自然因素导致的水体砷锑污染不仅严重威胁人类健康，更会影响其他动植物的生长发育。零价铁/氧化剂协同体系能够快速、高效去除水体中砷锑，同时能够有效解决反应过程中零价铁表面的钝化问题。本文基于零价铁/氧化剂协同体系，进一步研究不同零价铁材料（生铁、钢铁）对含砷废水的去除效果、典型固定床参数对零价铁/氧化剂协同体系的影响、混凝法-零价铁/氧化剂协同体系联用去除高浓度砷锑工业废水。 第一部分研究不同投加方式下，两种典型氧化剂（H2O2、NaClO）协同生铁、钢铁去除As(V)的效果。无氧化剂参与时，钢铁、生铁循环反应3次后As(V)去除率分别仅有12.4 %、8.8 %。连续泵入氧化剂时，钢铁、生铁经3次循环反应后As(V)去除率均维持在97.0 %以上，继续循环至第九次实验期间，As(V)去除率持续降低；反应初始一次投加氧化剂时，钢铁、生铁首次循环实验后As(V)去除率分别仅为90.4 %、90.2 %，显著低于连续泵入氧化剂时，前九次循环实验期间As(V)去除率持续下降，表明连续泵入氧化剂对As(V)的去除效果优于反应初期一次性投加。连续泵入氧化剂时钢铁、生铁均能实现As(V)的有效去除，但H2O2协同下的前四次循环实验及NaClO协同下的前三次循环实验中，生铁对As(V)的去除效果在反应10 min、30 min时均显著优于钢铁，即相同条件下单位时间内生铁比钢铁更快速的去除As(V)。第十至十五次循环实验期间改曝N2为O2时，两种氧化剂协同钢铁、生铁均能高效去除As(V)，去除率均持续高达98%以上，这是由于O2可协助强氧化剂驱动零价铁表面腐蚀，破坏钝化膜产生铁氧/羟基化合物，提高As(V)去除率。 第二部分研究了铁砂比、流速、H2O2浓度对零价铁/氧化剂协同体系去除As(V)的影响。流速为10 BV/h时，不同铁砂比下的出水始终处于氧化电位，此时零价铁表面腐蚀物主要为Fe(III)氧（氢）化物，几乎不会随出水外流，显著提高出水水质。流速为3 BV/h时，随着床体内的零价铁填充密度逐渐降低，自上而下的各取样口处As(V)去除率呈递增趋势。与单一组分零价铁填充体系相比，铁砂混合填充模式避免了氧化剂只在床体进水端即被过度消耗，流经活性床体时使其能够均匀活化和剥蚀不同部位的零价铁，反应生成铁氧/羟基化合物，显著提高As(V)的去除效果。在所有不同浓度下的H2O2下，铁砂比为1:10时砷的去除率于过滤床体自上而下的各取样口处均呈逐渐递增趋势，五个取样口氧化还原电位均为正值，系统始终处于氧化电位，床体内不同部位的零价铁均能与氧化剂充分接触并反应生成铁氧（氢）化物，从而使床体每一部分均能有效的发挥其除砷潜力和贡献。 第三部分研究混凝法与零价铁/氧化剂协同体系联用对高浓度砷锑工业废水的去除效果。单独利用零价铁/氧化剂协同体系或混凝法去除高浓度砷锑工业废水时均未能使出水中As、Sb浓度达到国家规定的工业废水排放标准。铁与重金属摩尔比为8:1时，混凝后出水静置30 min开始出现明显分层现象，但继续增大其摩尔比时产生的淤泥量越来越多，且砷锑去除效果并无显著差异。因此将摩尔比为8:1混凝后的出水流经零价铁/氧化剂活性床体，连续运行275 BV后，ZVI/H2O2协同体系去除高浓度工业废水时，出水中As、Sb残余浓度分别仅为0.004 mg/L、0.009 mg/L，ZVI/NaClO协同体系去除该高浓度工业废水时，出水中As、Sb残余浓度分别仅为0.006 mg/L、0.008 mg/L，经两种技术联合处理后出水水质显著提高，同时减少了二次污染。

Pollution of heavy metals in water due to human activities (industrial, agricultural) and natural factors not only seriously threatened the health of humans, but also affected the growth and development of other animals and plants. The synergetic system of ZVI/oxidants could eliminate As/Sb efficiently from wastewater and solve the problem of ZVI surface passivation. This study was based on ZVI/oxidants system to further prob into three aspects: removal of arsenic by two different iron materials (pig iron, steel), effects of typical parameters on ZVI/oxidants cooperative system, removal of As and Sb in high concentrations industrial wastewater via the combination technology of coagulation and ZVI/oxidants system. The first part studied the removal efficiency of As(V) by pig iron and steel combined with two typical oxidants (H2O2, NaClO) under different dosing methods. The As(V) removal rates were only 12.4 % and 8.8 % respectively after 3 cycles of steel and pig iron with no oxidants. The removal rates of As(V) were maintained above 97.0 % after 3 cycles of steel and pig iron when the oxidants was continuously pumped, then the As(V) removal rates continued to decrease during the next six experiments. The As(V) removal rates were only 90.4 % and 90.2 % after the first cycle of steel and pig iron when oxidants were added to the reaction at first, which was significantly lower than the removal rates of pumping oxidants continuously. It showed that the removal rates with continuous pumping of oxidants were superior to dosing oxidants at the beginning of reaction. Both steel and pig iron could remove As(V) efficiently when the oxidants was continuously pumped into solution. The As(V) removal rate of pig iron was notably higher than that of steel at the reaction of 10 min and 30 min in the first four cycles under H2O2 and the first three cycles under NaClO. Thus pig iron combined with oxidants removed As(V) more quickly than steel under the same experimental conditions. The As(V) removal rates were as high as 98 % of both steel and pig iron under two dosing methods of oxidants when O2 was pumped to solution, which suggested that O2 could assist typical oxidants to drive the Fe0 corrosion to produce iron oxide and oxyhydroxides that could improve the removal rates of As(V). The article also studied the effects of iron-sand ratio, flow rate and H2O2 concentration on the As(V) removal by ZVI/oxidants. The effluent was in oxidation state at different iron-sand ratios when the flow rate was 10BV/h. The surface corrosion of ZVI was mainly Fe(III) oxide (hydride) that almost couldn’t outflow with water, which significantly improved the quality of effluent. The removal rates of As(V) at each sampling port gradually increased with the decline of ZVI packing density. Compared with the system filled by ZVI alone, the mixed system of iron and sand avoided that oxidants were consumed only at water inlet, so that it could uniformly erode ZVI in different parts of experimental bed to produce ferric oxide/hydroxyl compounds. The removal rates of As(V) were gradually increasing at the sampling ports from top to bottom of the bed when ZVI:Sand was 1:10 under different concentrations of H2O2. The ORP of the five sampling ports were all positive, the entire system was always at oxidation potential. ZVI at different locations of the bed was in full contact with oxidants and reacted to form corrosion. Thus every part of the bed could effectively exert its arsenic removal potential and contribution. The paper also studied the removal of industrial wastewater containing high concentrations of As and Sb by the combination technology of ZVI/oxidants and coagulation. It showed that the concentrations of As and Sb in the effluent couldn’t reach the industrial wastewater emission standards when the sewage was disposed by ZVI/oxidants or coagulation alone. The effluent was layered apparently after 30 minutes by coagulation when the molar ratio of iron and heavy metals was 8:1. Amounts of sludge was produced with the increase of mole ratio, there was no significant difference in As/Sb removal while the mole ratio raised from 8:1 to 20:1. The effluent after coagulation at molar ratio of 8:1 flowed through the active column, thus the final concentrations of As and Sb in the outlet were only respectively 0.004 mg/L, 0.009 mg/L when the H2O2 was added, the final concentrations of As and Sb were separately 0.006 mg/L, 0.008 mg/L for NaClO. The combined technology not noly improved the quality of effluent observably, but also reduced the secondary pollution.