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| 1 | 湿地土壤重金属污染特征、来源及风险评价研究进展显示文摘湿地土壤重金属污染是当前湿地科学领域内的热点问题。论文较系统地总结了湿地土壤重金属在时间和空间上的污染特征,分析了湿地土壤重金属主要污染来源,总结了湿地土壤重金属形态的主要影响因素,评述了当前湿地土壤重金属在生态风险和健康风险评价方面的进展和不足。总体上,湿地土壤重金属含量在不同时间尺度上变化差异明显,在水平和垂直空间上的分布特征受人类活动方式和时间、湿地自然生态环境等因素影响。工农业活动、交通活动、人类生活废物排放、湿地商业开发等是湿地重金属的主要污染源。湿地水陆环境变化、氧化还原条件、人类活动等因素对湿地土壤重金属形态影响日益显著。最后,提出未来一段时间内湿地土壤重金属应加强研究尺度、手段和风险评价体系的研究。 | 徐明露 方凤满 林跃胜 | 2015 | 土壤通报2015，46，3： | 28 |
| 2 | 砷和汞在水生蔬菜及其生长环境中的迁移富集显示文摘为研究砷和汞在茭白、菱角植株及其生长环境的迁移富集变化,以'浙911号'茭白品种和'水红菱'为实验材料,采用在土壤中添加砷和汞的处理方法,测定处理后18 d内茭白、菱角器官及水体-土壤中砷和汞的积累量.结果表明:随栽培时间的延长,水体中砷和汞出现不断向土壤、水生蔬菜迁移的趋势,一段时间后达到动态平衡;当砷和汞共处水环境中时,汞的存在会抑制水体中砷向土壤、水生蔬菜迁移.茭白叶、茎中砷和汞含量呈现先升高后降低的趋势,茎是茭白富集重金属的主要器官之一.菱角中砷和汞含量总体呈现上升趋势,最终逐渐向杆、根迁移富集,叶、根是菱角富集重金属的主要器官.茭白和菱角对水体中砷和汞的富集系数远大于对土壤的富集系数,且对汞的富集能力都大于砷;茭白不同器官富集能力:茎>叶;菱角不同器官富集能力:根>叶(杆).说明砷和汞在水生蔬菜及生长环境中的迁移与富集能力因蔬菜种类、器官类型及重金属种类的不同而存在明显的差异. | 王方园 谢晓君 龙珠 徐金玲 周卫东 | 2017 | 浙江师范大学学报(自然科学版)2017，40，2： | 12 |
| 3 | 水岸带土壤生态环境与重金属污染研究进展显示文摘水岸带生态系统的保护、恢复和重建具有重要的科学意义和实践价值。笔者系统评述了水岸带生态系统功能研究进展,总结了国内外研究者对水岸带退化机制与生态修复的研究现状,分析了水岸带土壤重金属污染及其评价方法研究进展。就水岸带土壤生态环境及其修复研究而言,国外主要的关注焦点开始转向对退化水岸带生态系统的恢复以及水岸植被缓冲带的管理,而国内学者对水岸带生态系统恢复的理论及实践研究均较为薄弱。从水岸带土壤重金属污染研究来看,国内外水岸带都存在着不同程度的土壤重金属污染状况,并具有明显的生态风险,但主要的研究集中于土壤中重金属的赋存水平和污染现状分析,而没有能够将各环境因子、土壤生物对重金属的响应特征进行充分的考虑,导致了对区域内重金属可能存在的生态危害效应的评价不明。 | 吴爱琴 邓焕广 张菊 陈诗越 | 2015 | 中国农学通报2015，31，6： | 4 |
| 4 | Spectroscopic studies of dye-surfactant interactions with the co-existence of heavy metal ions for foam fractionation显示文摘The interaction between a cationic dye Methylene Blue(MB) and an anionic surfactant sodium dodecyl sulfate(SDS) with the presence of Cd2+ was investigated spectrophotometrically in a certain concentration range.The spectrophotometric measurements of dye-metal ion-surfactant system were carried out.The results indicated that the SDS concentration had a significant influence on the dye spectrum,while the addition of Cd2+ hardly caused change of the maximum value of absorbance.According to this observation,we concluded that electrostatic and hydrophobic interaction between dye and surfactant occurred up to a certain level,and the homo-ions Cd2+ almost exerted no effect on the dye-surfactant complexation,establishing a theoretical foundation for simultaneous removal of organic dye and heavy metal using foam fractionation.Meanwhile,the effects of their interaction on foam performance were investigated.The results showed that the addition of Cd2+ favored the tendency to ameliorate foam properties just contrary to MB.The feasibility of foam separation for dye and heavy metal removal from simulated wastewater was also confirmed using a continuous foam fractionator.In the simultaneous removal process,with the initial SDS concentration ranging from 0.5 to 5.0mmol/L,the maximum removal efficiencies of MB and Cd2+ were obtained as 99.69% and 99.61%,respectively.The enrichment ratios were reduced from24.34 to 7.65 for MB and from22.01 to 3.35 for Cd2+. | Dongmei Zhang Guangming Zeng Jinhui Huang Wenkai Bi Gengxin Xie | 2012 | Journal of Environmental Sciences2012，24，12： | 2 |
| 5 | Water extraction kinetics of metals, arsenic and dissolved organic carbon from industrial contaminated poplar leaves显示文摘In industrial areas, tree leaves contaminated by metals and metalloids could constitute a secondary source of pollutants. In the present study, water extraction kinetics of inorganic elements(IE: Pb, Zn, Cd, As, Fe and Mn), dissolved organic carbon, pH and biological activity were studied for industrial contaminated poplar leaves. Moreover, the distribution of the IE through the size fractions of the associated top soil was measured. High quantities of Mn, Zn and As and polysaccharides were released in the solution from the strongly contaminated leaves. The kinetic of release varied with time and metal type. The solution pH decreased while dissolved organic contents increased with time after 30 days. Therefore, these contaminated leaves could constitute a source of more available organic metals and metalloids than the initial inorganic process particles. However, the distribution of the IE through the size fractions of the top soil suggested that a great part of the released IE was adsorbed, reducing in consequence their transfers and bioavailability. It's concluded that mobility/bioavailability and speciation of metals and metalloids released from the decomposition of polluted tree leaves depends on soil characteristics, pollutant type and litter composition, with consequences for environmental risk assessment. | Muhammad Shahid Tiantian Xiong Maryse Castrec-Rouelle Tibo Leveque Camille Dumat | 2013 | Journal of Environmental Sciences2013，25，12： | 2 |
| 6 | 辽河保护区不同缓冲区尺度土地利用与水质的响应关系显示文摘为查明辽河保护区土地利用方式与水质的响应关系,将研究区地理空间数据云网站遥感影像数据和同期22个采样点实测作为数据源。实测数据包括水体营养盐类污染指标总氮(TN)、总磷(TP)、化学需氧量(COD)、溶解氧(DO)和氨氮(NH3-N)浓度和水体重金属类污染指标铜(Cu)、锌(Zn)、镍(Ni)、镉(Cd)、铬(Cr)、铅(Pb)和砷(As)浓度。通过GIS软件划出采样点周边250、500、750和1 000 m的圆形缓冲区,采用Spearman相关性分析和冗余分析(RDA)方法,分析不同空间尺度下各种土地利用类型与水质指标之间的关系。结果显示:(1)随着缓冲区面积的增加,土地利用类型更加丰富,水体营养盐类污染指标浓度以TN、TP的污染超标最严重,各项水体重金属类污染指标浓度均低于国家地表水Ⅰ类标准规定的限值。(2)在250、500、750和1000 m 4种圆形缓冲区中,250m缓冲区范围内土地利用方式对水质的解释率最高为60.8%。(3)在250 m缓冲区范围内,住宅用地与TN呈极显著的正相关;林地与TN、TP呈负相关,相关性系数分别为-0.459、-0.512;旱地与Cd呈显著正相关,相关性系数为0.685;水田与Cr呈极显著正相关,相关性系数为0.909。 | 王昭擎 王育鹏 徐笠 冯娜娜 吴亚梅 邢钰 宫志锋 | 2023 | 安徽农业大学学报2023，50，1： | 0 |
| 7 | A barrier to metal movement: Synchrotron study of iron plaque on roots of wetland plants显示文摘A wetland with attractive plants hosting birds and other wildlife is an esthetically pleasing prospect that is gaining popularity as a way of stabilizing or remediating metalcontaminated soils and sediment(Weber and Gagnon,2014; | Iris Koch Michelle M.Nearing | 2016 | Journal of Environmental Sciences2016，28，6： | 0 |
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