Electro-Chemical Reduction of Nitrate in Underground Water and Regeration Waste Water of Ion-exchange resin

电化学还原地下水及离子交换树脂再生废水中的硝酸盐

• 批准号: 07555173
• 负责人: NAKAMURA Fumio
• 金额: $ 1.86万
• 依托单位: Yamanashi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555173/
• 关键词: Nitrate reduction; Electrolysis; Regeneration waste; Reduction efficiency; 塩素イオンの再生利用; 交換樹脂再生廃液

Electro-chemical reduction of Nitrate in underground water and regeration waste water of Ion-exchange resin were investigated in this research.Research results may be summarized as follows.(1) Concentration of Cl^-, NO_3^-, SO_4^<2-> in regeration waste water of anion^- exchange resin (IRA-400) was in the order of g/l.(2) Although the change in concentration of SO_4^<2->, CO_3^<2-> was not found, NO_3^- was reducted only in the camber of cathode, and produced NO_2^-, NH_4^+, N_2, NO,NH_3(3) Cl^- was oxidized in the anode, and produced Cl_2 and HC10(4) It was found that main part of gas prodused in cahode was H_2, and O_2 in anode(5) It was found that reduction rate was proportional to the applied electric current, electrolysis time and electric power, however, it has reached to the maximum at around 5A,90 min and 50 Wh. Therefore, it was estimated that electriccurrent and electrolysis time should be set to 4-5A and 60 min from the viewpoint of reduction efficiency.

本文对离子交换树脂再生废水和地下水中硝酸盐的电化学还原进行了研究，结果表明：(1)阴离子交换树脂再生废水中Cl~-、NO_3~-、SO_4~(2-)和Gt~(2-)的浓度约为g/L。NO_3~(2-)只在阴极部被还原，生成NO_2~-、NH_4~(2+)、N_2、NO、NH_3(3)Cl~-，在阳极被氧化生成Cl_2和HC10(4)。结果表明，阳极中生成的气体主要是H_2，而阳极中的O_2主要是O_2，还原速率与电流、电解时间和电能成正比，在5A、90min和50WH左右达到最大。因此，从还原效率的角度估计，电流和电解时间应设置为4-5A和60min。

项目成果

F.Nakamura, J.Watanabe: "Behavior of N in the cource of electrolysis of Nitrate" 46th annual conf.of JWWA. 4-6. 198-199 (1995)

F.Nakamura、J.Watanabe：“硝酸盐电解过程中 N 的行为”JWWA 第 46 届年度会议。

F.Kazama, F.Nakamura Y.Sakamoto: "Removal of Nitrate-ion by ion-exchang resin (report 1)" Jour.of JWWA. 66 (12). 9-19 (1997)

F.Kazama、F.Nakamura Y.Sakamoto：“通过离子交换树脂去除硝酸根离子（报告 1）”Jour.of JWWA。

和久 広丈, 中村 文雄: "硝酸性窒素の電解還元効率に及ぼす負荷電流、電力量の影響" 土木学会第5回年次学術講演会概要集(7部). VII-219. 436-437 (1997)

Hirotake Waku，Fumio Nakamura：“负载电流和电能对硝态氮电解还原效率的影响”日本土木工程师学会第五届学术年会摘要（第 7 部分）436-437。 1997）

和久広丈 中村文雄: "硝酸性窒素の電解還元効率に及ぼす負荷電流、電力量の影響" 土木学会第5回年次学術講演会概要集(7部). VII-219. 436-437 (1998)

Hirotake Waku和Fumio Nakamura：“负载电流和电能对硝态氮电解还原效率的影响”日本土木工程师学会第五届学术年会摘要（第7部分）436-437。 1998））

中村文雄: "電解還元効率に及ぼす硝酸性窒素濃度の影響" 全国水道研究発表大会. (予定). (1996)

Fumio Nakamura：“硝态氮浓度对电解还原效率的影响”全国供水研究会议（计划）（1996 年）。