Preparation method of adsorbent for removing copper ions from water. /PatentNo.: 2007 1 0115054 The invention discloses a preparation method of an adsorbent for removing copper ions from water, which is characterized by comprising the following steps: (1) preparing sodium alginate extracted from sludge into 0.5-2% (w/v). (2) washing the gel substance with deionized water until the eluent does not contain Ca 2+; (3) drying the washed gel substance to constant weight at 50-80 DEG C to prepare a dry adsorbent. By using the method of the invention, the sludge can be converted into a useful copper ion adsorbent, so as to realize "treating waste with waste" and solve the problems that the traditional adsorbent consumes a lot of natural resources and has high cost. Date of application: 165438+2007126 October, date of publication: September 3, 2008 Date of authorization announcement: Applicant/patentee: China Ocean University Applicant's address: Wang Lin, inventor and designer, No.238 Songling Road, Laoshan District, Qingdao, Shandong Province; Lin Yuemei; Zhang Hailing; Late patent agency: Qingdao Lianzhi Patent and Trademark Office Co., Ltd. Agent: Yang Patent Type: invention patent classification number: B 01J 20/24; c02f 1/28； C02F 1/62