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  1. 1. Registration No. 5839536 Abstract In November 2016, Dunton Environmental was invited by Hasky to carry out a bench scale trial treatment on heavy metal contaminated industrial soil. Dunton Environmental created a mix design product using Regener 8-19 solution as the primary catalyst, coupled with other reagents. This mix design product was developed to reduce the concentration of heavy metal contamination within the soil. The trial treatment was conducted at the Tianjin trial site. All the samples were tested by the ALS Group. This trial successfully proved the capability of the Regener8-19 solution to treat heavy metal contaminated soil, and therefore, significantly reduce the risk of harm to human health and the environment from this material. Regener 8-19 Technical Background Regener 8-19 is applied to soils that are polluted with various heavy metal contaminants. The product acts to alter the chemical environment within the solid matrix, allowing the reduction of the heavy metals from the solid. Regener 8-19 is applied in a liquid or powder medium to the solid waste by a variety of mechanisms depending on the nature and composition of the soil or solid waste. On site, Regener 8-19 is mixed and distributed homogenously through the soil or solid waste via Dunton Environmental’s Soterion batching plant; Dunton Environmental’s Stabilisation Unit or Dunton Environmental’s Allu mixing process. Regener 8-19 comprises specific metal-binding polymers that interact with the contaminants designated for reduction. The chemical process involves the exchange of ions between the Regener 8-19 solution and the metals present with the solid matrix, leading to the binding and immobilisation of the heavy metal contaminants. Technical Case Study Registered Office: Unit 1, Tamebridge Industrial Estate, Aldridge Road, Perry Barr, Birmingham, B42 2TX • Bench Scale Trial of Remediation of Heavy Metal Contaminated Industrial Soils from Hasky Environmental Protection Science & Technology Development Co., Ltd
  2. 2. Registration No. 5839536 Registered Office: Unit 1, Tamebridge Industrial Estate, Aldridge Road, Perry Barr, Birmingham, B42 2TX • Technical Case Study Project Background Hasky Environmental Protection Science & Technology Development Co., Ltd is an integrated service provider of environmental protection. Hasky has been offering integrated solutions for a wide array of industry requirements including, water and river monitoring, engineering consulting, project management, core equipment manufacturing, investment and operation, urban water management, ecological restoration, and VOC control. Dunton (Beijing) visited Hasky for a technical meeting regarding Dunton’s heavy metal remediation technology in November 2016. After the meeting, Hasky showed an interest in Dunton’s technology, and commissioned Dunton to carry out a trial treatment of approximately 10 kilograms of heavy metal contaminated soil sample in November 2016. Due to commercial protection reasons, Hasky cannot provide Dunton any information related to the sampled soil. After receiving the sample, Dunton commissioned ALS chemical laboratory to determine initial heavy metal concentration, testing occurred on 6th of December 2016. Solution Regener 8-19 was used to reduce the heavy metal content within the soil, the first treatment occurred after baseline sample was obtained (6th of December 2016). The soil was then sampled and tested by ALS on 15th of March 2017. The soil was treated a second time after 15th of March 2017 and sampled on 24th of April 2017, 12th of May 2017 and 22th of September 2017.
  3. 3. Registration No. 5839536 Registered Office: Unit 1, Tamebridge Industrial Estate, Aldridge Road, Perry Barr, Birmingham, B42 2TX • Technical Case Study Results The results were recorded for each of the 3 contaminants (Pb, Al and Fe), all of which showed a significant reduction. The degradation results and graphs are presented below. Conclusion Application of the proposed Regener 8-19 solution reduced the concentration of Pb, Al and Fe contaminants within the soil by 10.6 %, 60.5 % and 32.6 %, respectively, which achieved the client’s requirement. As a result of this trial, the Regener 8-19 product has proven its capability to significantly reduce heavy metal contaminants within the soil samples provided by Hasky. Since the trial test was carried out on a small scale, it would be beneficial to have a further cooperation with Hasky to undertake a large-scale, on-site pilot project, to further prove the effectiveness of the Regener 8-19 product and to demonstrate the ease of usage of the product under normal working conditions. Figure 1 - Metal degradation over time.