雷州无瓣海桑群落7种元素的生物累积和循环

在雷州市附城镇岚北人工生态恢复的 7a生无瓣海桑群落生物量调查的基础上 ,对所采集的无瓣海桑进行了植物体各组分样品的灰分和元素含量测定与循环分析 ,结果表明 :无瓣海桑植物体不同组分的灰分含量范围为 2 .2 7%～ 2 6 .4 1% ,以细根的含量最高 ,枯枝的含量最低 .植物体各组分中 7种元素质量分数范围分别为K 0 .11%～ 1.5 6 % ,Na0 .11%～ 1.6 6 % ,Ca 0 .2 0 %～ 2 .6 6 % ,Mg 0 .15 %～ 1.5 9% ,Fe 0 .0 4× 10 -3 ～ 9.6 4× 10 -3 ,Zn 0 .0 5× 10 -4～ 1.0 3× 10 -4,Cu0 .16× 10 -5～ 1.5 0× 10 -5.其加权平均的富集系数为 0 .0 5～ 9.70 ,其中Ca >K >Cu >Na >Mg>Zn >Fe .群落现存生物量中的累积储量分别为K 10 9.76gm-2 ,Ca 138.89gm-2 ,Na 86 .5 7gm-2 ,Mg 81.0 7gm-2 ,Fe 13.139gm-2 ,Zn 0 .4 83gm-2 ,Cu 0 .10 8gm-2 .群落 2 0 0 1年的元素存留累积储量分别为Ca4 1.6 8gm-2 ,K 37.2 4gm-2 ,Mg 2 7.33gm-2 ,Na2 5 .5 6gm-2 ,Fe 4 .2 75gm-2 ,Zn 0 .188gm-2 ,Cu 0 .0 39gm-2 .2 0 0 1年归还量分别为Ca 2 8.5 9gm-2 ,K 16 .83gm-2 ,Mg 12 .0 7gm-2 ,Na 11.5 8gm-2 ,Fe 0 .916gm-2 ,Zn 0 .14 1gm-2 ,Cu 0 .0 2 6gm-2 .年吸收量分别为Ca 70 .2 7gm-2 ,K 5 4 .0 7gm-2 ,Mg 39.4 0gm-2 ,Na 37.1     

土壤,沉积物中微量金属形态分配预测初步研究

本文讨论了土壤、沉积物中微量金属的形态分配预测问题。对已有的一些工作进行了总结,并以我国东部平原为例,建立了土壤微量金属多元回归相分配预测摸型。     

应用GEM法对硫酸工业中重金属污染的研究

为查明硫酸工业中主要重金属的危害以及不同制酸工艺产生的危害差异，对辽宁省主要生产硫酸企业进行了调研，并应用ＭＥＧ法，对矿石原料中重金属的含量进行了数学模型分析。     

金属粉末烧结材料泊松比模型的探讨

分析了粉末烧结材料泊松比与屈服准则的关系 ,指出了泊松比Kuhn模型的等价假设 ,比较了几种泊松比模型的特点 ,提出了一种能反映致密过程中密度较大时泊松比增长率减缓的特点的箕舌线函数型泊松比模型。     

铁氧体化法在重金属污染物解毒处理中的应用

综合介绍铁氧体化法在重金属污染物解毒处理方面的应用研究情况，提出毒害性污染物解毒处理的概念，并进一步指出开发降解性毒害污染物解毒处理工艺中值得注意的问题。     

Distribution of heavy metals in the Grand Canal (Hangzhou section) and its contributing factors

ＤｉｓｔｒｉｂｕｔｉｏｎｏｆｈｅａｖｙｍｅｔａｌｓｉｎｔｈｅＧｒａｎｄＣａｎａｌ（Ｈａｎｇｚｈｏｕｓｅｃｔｉｏｎ）ａｎｄｉｔｓｃｏｎｔｒｉｂｕｔｉｎｇｆａｃｔｏｒｓＷｅｎｇＨｕａｎｘｉｎ，ＺｈａｎｇＤｅｎｇｒｏｎｇＤｅｐａｒｔｍｅｎｔｏｆＥａｒｔｈ...     

Remediation of Cu and As contaminated water and soil utilizing biochar supported layered double hydroxide: Mechanisms and soil environment altering

Preparing materials for simultaneous remediation of anionic and cationic heavy metals contamination has always been the focus of research. Herein a biochar supported FeMnMg layered double hydroxide (LDH) composites (LB) for simultaneous remediation of copper and arsenic contamination in water and soil has been assembled by a facile co-precipitation approach. Both adsorption isotherm and kinetics studies of heavy metals removal by LB were applied to look into the adsorption performance of adsorbents in water. Moreover, the adsorption mechanisms of Cu and As by LB were investigated, showing that Cu in aqueous solution was removed by the isomorphic substitution, precipitation and electrostatic adsorption while As was removed by complexation. In addition, the availability of Cu and As in the soil incubation experiments was reduced by 35.54%–63.00% and 8.39%–29.04%, respectively by using LB. Meanwhile, the addition of LB increased the activities of urease and sucrase by 93.78%–374.35% and 84.35%–520.04%, respectively, of which 1% of the dosage was the best. A phenomenon was found that the richness and structure of microbial community became vigorous within 1% dosage of LB, which indirectly enhanced the passivation and stabilization of heavy metals. These results indicated that the soil environment was significantly improved by LB. This research demonstrates that LB would be an imaginably forceful material for the remediation of anionic and cationic heavy metals in contaminated water and soil.     

立式金属油罐容积编表计算机自动查询与计算系统

介绍了立式金属油罐容积编表计算机自动查询与计算系统的设计思想，查询计算原理，功能及实现，程序的编制及调试，应用及测试等，该系统的建立旨在克服人工查询与计算方法的计算繁琐，费时，易出差错的缺点，达到了本质安全。     

利用微生态系统研究底泥重金属的生物有效性

对利用微生态系统生物暴露试验评价底泥重金属生物有效性这一方法可行性进行研究。结果表明，用微生态系统进行生物长期暴露试验，来研究底泥重金属的生物有效性是成功的。可行的，根据受试生物折生长发育状况，可以判断底泥重金属毒性的大小，根据生物积累的重金属浓度，可以判定底泥重金属生物可利用性的大小。     

在有氧条件下用生物过滤系统去除NOx

针对有氧环境下用生物过滤法处理废气中的NOx效率普遍不高的现状,将优选后的好氧反硝化菌应用于生物过滤系统用来脱除模拟燃烧废气中NOx,同时设立反硝化菌活性再生系统,维持系统中微生物间的持续稳定反硝化协同性和有效微生物量.进一步研究高浓度氧环境下,环境因素对NO脱除效率的影响,以及研究模拟气体中NO在生物过滤系统中的转化机理.结果表明,该工艺系统能有效克服氧对反硝化菌活性的抑制作用,生物滤塔在不同氧浓度下皆可实现对NO的高效率脱除;甚至在氧气体积分数20%、气体停留时间为1min、最佳操作温度为40～50℃条件下,对647mg·m-3NO的脱除率可达85%以上.本实验有目的地培养得到好氧条件下特有的微生物混合体系,其以兼性反硝化菌为主,多种菌种的存在形成良好的生物协同性,有利于有氧环境下NOx好氧反硝化反应的高效稳定进行.