Hazardous industrial wastes negatively impact the environment by creating issues for aquatic as well as human's life. This study investigates the treatment of hazardous industrial wastewater using cost-effective graphite adsorbent along with electrochemical regeneration integrated with renewable solar energy. The synthetic industrial effluent containing crystal violet dye was treated using an adsorbent (Nyex� 1000) having a surface area of 1.0 m2 g�1. The efficiency of removing solute was found to be more than 90. The adsorbent regeneration efficiency was achieved at 99.5 by passing a charge of 100 C g�1 at current density of 10 mA cm�2 for 1 h. Solar energy was integrated with electrochemical reactor for the regeneration of adsorbent to make the system cost-effective and self-sustainable. Practitioner points: Industrial hazardous wastewater treatment with a cost-effective graphite integrated adsorbent. Development of renewable solar energy-integrated with electrochemical system for regeneration. Regeneration efficiency of adsorbent Nyex� 1000 was achieved around 99.5 with integrated system. Sustainable system was introduced to incorporate with renewable energy for waste water treatment. © 2021 Water Environment Federation