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首页> 外文期刊>Desalination and water treatment >Heavy metal removal from wastewaters by agricultural waste low-cost adsorbents: hindrances of adsorption technology to the large scale industrial application – a review
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Heavy metal removal from wastewaters by agricultural waste low-cost adsorbents: hindrances of adsorption technology to the large scale industrial application – a review

机译：农业废料低成本吸附剂从废水中去除重金属：吸附技术对大规模工业应用的障碍–综述

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摘要

This review paper provides a critical examination on heavy metal removal from wastewaters by the agrowaste low-cost adsorbents, with focus on: (i) water pollution by heavy metals and their adverse effects on flora and fauna, (ii) extent and efficiency of the heavy metal removal from the real industrial effluents by agrowaste adsorbents, (iii) advantages and hindrances of adsorption technology to the large scale industrial application, (iv) heavy metal adsorption mechanisms, (v) biosorbents behavior in a multimetal adsorption system and (vi) biosorbent regeneration and desorptive studies. This was carried out through an extensive examination of relevant published literature on the topic. The review paper found that the agricultural low-cost adsorbents have proven to remove heavy metals from aqueous solutions to some extent and are promising alternatives. However, it is noticeable that the behavior of the low-cost adsorbents with respect to the removal of the heavy metals from the real industrial wastewaters is not well known. In nearly all successful studies, conclusions on these materials potential to treat industrial wastewaters laden with heavy metals are based on the simulations drawn from the treatment of synthetic wastewaters. Furthermore, the prominent agricultural low-cost adsorbents such as Carica papaya, maize cob, soybean oil cake, banana peel, walnut shell, sesame leaf and stem, and mango peel, and many others which were proven to have a high adsorption capacity (mg/g): 1,666.67, 495.9, 476.2, 131.56, 151.5, 84.74, and 68.92, respectively, were investigated under the conditions of synthetic wastewaters and not with real industrial effluents. Moreover, the residual metal ion concentrations were higher than the permissible discharge standards. Hence, their applicability to the industrial effluents is still problematic. The main hindrances are: (i) imbalance between laboratory studies and pilot studies at large scale; (ii) low-cost adsorbents have been applied to the solutions which do not reflect the real heavy metals' concentrations found in industrial effluents; (iii) residual concentrations are higher compared with the discharge standard limits and (iv) economic and costs evaluation studies for practical material engineering design and low-cost adsorbents commercialization information are missing.
机译：这篇综述文章对通过agroaste低成本吸附剂去除废水中的重金属进行了严格的审查，重点是：（i）重金属对水的污染及其对动植物的不利影响，（ii）污染的程度和效率垃圾吸附剂从实际工业废水中去除重金属，（iii）吸附技术在大规模工业应用中的优势和障碍，（iv）重金属吸附机理，（v）多金属吸附系统中的生物吸附剂行为，以及（vi）生物吸附剂再生和吸附研究。这是通过对有关该主题的相关出版文献的广泛检查来进行的。该评论文章发现，农业低成本吸附剂已被证明可以在一定程度上从水溶液中去除重金属，并且是有前途的替代品。然而，值得注意的是，相对于从真实工业废水中去除重金属而言，低成本吸附剂的行为尚不为人所知。在几乎所有成功的研究中，这些材料在处理重金属负载的工业废水中的潜力均基于合成废水的处理模拟得出的结论。此外，著名的农业低成本吸附剂，例如番木瓜，玉米芯，大豆油饼，香蕉皮，核桃壳，芝麻叶和茎，芒果皮等，许多其他吸附剂均具有很高的吸附能力（mg / g）：分别在合成废水而非实际工业废水条件下研究了1,666.67、495.9、476.2、131.56、151.5、84.74和68.92。此外，残留金属离子浓度高于允许的排放标准。因此，它们在工业废水中的适用性仍然存在问题。主要障碍是：（i）大规模的实验室研究与试点研究之间的不平衡； （ii）已将低成本吸附剂应用于解决方案，这些解决方案无法反映出工业废水中真实的重金属浓度； （iii）残留浓度高于排放标准限值，并且（iv）缺少实用材料工程设计的经济和成本评估研究以及低成本吸附剂的商业化信息。

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  • 来源
    《Desalination and water treatment》 |2017年第6期|192-214|共23页
  • 作者

    Habineza Alphonse; Zhai Jun; Ntakirutimana Theoneste; Qiu Fu Ping; Li Xiaoting; Wang Quanfeng;

  • 作者单位

    Chongqing Univ, Sch Urban Construct & Environm Engn, Key Lab Three Gorges Reservoir Regions Ecoenviron, Fac Built Environm,Dept Environm Engn, Chongqing 400045, Peoples R China;

    Chongqing Univ, Sch Urban Construct & Environm Engn, Key Lab Three Gorges Reservoir Regions Ecoenviron, Fac Built Environm,Dept Environm Engn, Chongqing 400045, Peoples R China;

    Univ Rwanda, Coll Med & Hlth Sci, Sch Publ Hlth, Dept Environm Hlth, Kigali, Rwanda;

    Chongqing Univ, Sch Urban Construct & Environm Engn, Key Lab Three Gorges Reservoir Regions Ecoenviron, Fac Built Environm,Dept Environm Engn, Chongqing 400045, Peoples R China;

    Chongqing Univ, Sch Urban Construct & Environm Engn, Key Lab Three Gorges Reservoir Regions Ecoenviron, Fac Built Environm,Dept Environm Engn, Chongqing 400045, Peoples R China;

    Chongqing Univ, Sch Urban Construct & Environm Engn, Key Lab Three Gorges Reservoir Regions Ecoenviron, Fac Built Environm,Dept Environm Engn, Chongqing 400045, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Adsorption technology; Agricultural waste low-cost adsorbents; Heavy metals; Hindrances; Industrial wastewaters;

    机译：吸附技术;农业废料低成本吸附剂;重金属;危害;工业废水;

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